Attachment 219664 Details for Bug 251122 – Jenkins log file

Jenkins log file

jenkins.log (text/plain), 368.42 KB, created by Gary on 2020-11-14 01:58:31 UTC

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Creator: Gary

Created: 2020-11-14 01:58:31 UTC

Size: 368.42 KB

patch

obsolete

>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/cloudbees-folder/6.15/cloudbees-folder.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/cloudbees-folder/6.15/cloudbees-folder.hpi
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/cloudbees-folder/6.15/cloudbees-folder.hpi to /usr/local/jenkins/plugins/cloudbees-folder.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/cloudbees-folder/6.15/cloudbees-folder.hpi (redirected to: https://get.jenkins.io/plugins/cloudbees-folder/6.15/cloudbees-folder.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:44:17.330+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of trilead-api on behalf of admin
>2020-11-14 01:44:17.665+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading trilead-api
>2020-11-14 01:44:17.665+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install trilead-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/trilead-api/1.0.12/trilead-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/trilead-api/1.0.12/trilead-api.hpi
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/trilead-api/1.0.12/trilead-api.hpi to /usr/local/jenkins/plugins/trilead-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/trilead-api/1.0.12/trilead-api.hpi (redirected to: https://get.jenkins.io/plugins/trilead-api/1.0.12/trilead-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:44:17.666+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of antisamy-markup-formatter on behalf of admin
>2020-11-14 01:44:19.248+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading antisamy-markup-formatter
>2020-11-14 01:44:19.249+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install antisamy-markup-formatter
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/antisamy-markup-formatter/2.1/antisamy-markup-formatter.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/antisamy-markup-formatter/2.1/antisamy-markup-formatter.hpi
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/antisamy-markup-formatter/2.1/antisamy-markup-formatter.hpi to /usr/local/jenkins/plugins/antisamy-markup-formatter.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/antisamy-markup-formatter/2.1/antisamy-markup-formatter.hpi (redirected to: https://get.jenkins.io/plugins/antisamy-markup-formatter/2.1/antisamy-markup-formatter.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:44:19.249+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of jdk-tool on behalf of admin
>2020-11-14 01:44:20.334+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading jdk-tool
>2020-11-14 01:44:20.334+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install jdk-tool
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/jdk-tool/1.4/jdk-tool.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/jdk-tool/1.4/jdk-tool.hpi
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/jdk-tool/1.4/jdk-tool.hpi to /usr/local/jenkins/plugins/jdk-tool.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/jdk-tool/1.4/jdk-tool.hpi (redirected to: https://get.jenkins.io/plugins/jdk-tool/1.4/jdk-tool.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:44:20.335+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of structs on behalf of admin
>2020-11-14 01:44:21.524+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading structs
>2020-11-14 01:44:21.525+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install structs
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/structs/1.20/structs.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/structs/1.20/structs.hpi
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/structs/1.20/structs.hpi to /usr/local/jenkins/plugins/structs.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/structs/1.20/structs.hpi (redirected to: https://get.jenkins.io/plugins/structs/1.20/structs.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:44:21.525+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of workflow-step-api on behalf of admin
>2020-11-14 01:44:22.590+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading workflow-step-api
>2020-11-14 01:44:22.591+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install workflow-step-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-step-api/2.23/workflow-step-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-step-api/2.23/workflow-step-api.hpi
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/workflow-step-api/2.23/workflow-step-api.hpi to /usr/local/jenkins/plugins/workflow-step-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/workflow-step-api/2.23/workflow-step-api.hpi (redirected to: https://get.jenkins.io/plugins/workflow-step-api/2.23/workflow-step-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:44:22.591+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of token-macro on behalf of admin
>2020-11-14 01:44:23.939+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading token-macro
>2020-11-14 01:44:23.939+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install token-macro
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/token-macro/2.12/token-macro.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/token-macro/2.12/token-macro.hpi
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/token-macro/2.12/token-macro.hpi to /usr/local/jenkins/plugins/token-macro.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/token-macro/2.12/token-macro.hpi (redirected to: https://get.jenkins.io/plugins/token-macro/2.12/token-macro.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:44:23.939+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of build-timeout on behalf of admin
>2020-11-14 01:44:25.225+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading build-timeout
>2020-11-14 01:44:25.226+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install build-timeout
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/build-timeout/1.20/build-timeout.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/build-timeout/1.20/build-timeout.hpi
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/build-timeout/1.20/build-timeout.hpi to /usr/local/jenkins/plugins/build-timeout.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/build-timeout/1.20/build-timeout.hpi (redirected to: https://get.jenkins.io/plugins/build-timeout/1.20/build-timeout.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:44:25.226+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of credentials on behalf of admin
>2020-11-14 01:44:25.889+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading credentials
>2020-11-14 01:44:25.890+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install credentials
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/credentials/2.3.13/credentials.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/credentials/2.3.13/credentials.hpi
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/credentials/2.3.13/credentials.hpi to /usr/local/jenkins/plugins/credentials.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/credentials/2.3.13/credentials.hpi (redirected to: https://get.jenkins.io/plugins/credentials/2.3.13/credentials.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:44:25.890+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of plain-credentials on behalf of admin
>2020-11-14 01:44:26.478+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading plain-credentials
>2020-11-14 01:44:26.479+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install plain-credentials
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/plain-credentials/1.7/plain-credentials.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/plain-credentials/1.7/plain-credentials.hpi
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/plain-credentials/1.7/plain-credentials.hpi to /usr/local/jenkins/plugins/plain-credentials.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/plain-credentials/1.7/plain-credentials.hpi (redirected to: https://get.jenkins.io/plugins/plain-credentials/1.7/plain-credentials.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:44:26.479+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of ssh-credentials on behalf of admin
>2020-11-14 01:44:26.973+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading ssh-credentials
>2020-11-14 01:44:26.974+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install ssh-credentials
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/ssh-credentials/1.18.1/ssh-credentials.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/ssh-credentials/1.18.1/ssh-credentials.hpi
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/ssh-credentials/1.18.1/ssh-credentials.hpi to /usr/local/jenkins/plugins/ssh-credentials.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/ssh-credentials/1.18.1/ssh-credentials.hpi (redirected to: https://get.jenkins.io/plugins/ssh-credentials/1.18.1/ssh-credentials.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:44:26.974+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of credentials-binding on behalf of admin
>2020-11-14 01:44:27.335+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading credentials-binding
>2020-11-14 01:44:27.335+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install credentials-binding
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/credentials-binding/1.24/credentials-binding.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/credentials-binding/1.24/credentials-binding.hpi
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/credentials-binding/1.24/credentials-binding.hpi to /usr/local/jenkins/plugins/credentials-binding.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/credentials-binding/1.24/credentials-binding.hpi (redirected to: https://get.jenkins.io/plugins/credentials-binding/1.24/credentials-binding.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:44:27.336+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of scm-api on behalf of admin
>2020-11-14 01:44:27.674+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading scm-api
>2020-11-14 01:44:27.675+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install scm-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/scm-api/2.6.4/scm-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/scm-api/2.6.4/scm-api.hpi
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/scm-api/2.6.4/scm-api.hpi to /usr/local/jenkins/plugins/scm-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/scm-api/2.6.4/scm-api.hpi (redirected to: https://get.jenkins.io/plugins/scm-api/2.6.4/scm-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:44:27.675+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of workflow-api on behalf of admin
>2020-11-14 01:44:28.030+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading workflow-api
>2020-11-14 01:44:28.031+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install workflow-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-api/2.40/workflow-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-api/2.40/workflow-api.hpi
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/workflow-api/2.40/workflow-api.hpi to /usr/local/jenkins/plugins/workflow-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/workflow-api/2.40/workflow-api.hpi (redirected to: https://get.jenkins.io/plugins/workflow-api/2.40/workflow-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:44:28.031+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of timestamper on behalf of admin
>2020-11-14 01:44:28.383+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading timestamper
>2020-11-14 01:44:28.384+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install timestamper
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/timestamper/1.11.8/timestamper.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/timestamper/1.11.8/timestamper.hpi
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/timestamper/1.11.8/timestamper.hpi to /usr/local/jenkins/plugins/timestamper.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/timestamper/1.11.8/timestamper.hpi (redirected to: https://get.jenkins.io/plugins/timestamper/1.11.8/timestamper.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:44:28.384+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of script-security on behalf of admin
>2020-11-14 01:44:28.762+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading script-security
>2020-11-14 01:44:28.762+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install script-security
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/script-security/1.75/script-security.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/script-security/1.75/script-security.hpi
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/script-security/1.75/script-security.hpi to /usr/local/jenkins/plugins/script-security.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/script-security/1.75/script-security.hpi (redirected to: https://get.jenkins.io/plugins/script-security/1.75/script-security.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:44:28.763+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of workflow-support on behalf of admin
>2020-11-14 01:44:29.373+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading workflow-support
>2020-11-14 01:44:29.373+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install workflow-support
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-support/3.6/workflow-support.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-support/3.6/workflow-support.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/workflow-support/3.6/workflow-support.hpi to /usr/local/jenkins/plugins/workflow-support.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/workflow-support/3.6/workflow-support.hpi (redirected to: https://get.jenkins.io/plugins/workflow-support/3.6/workflow-support.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:44:29.374+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of durable-task on behalf of admin
>2020-11-14 01:44:30.430+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading durable-task
>2020-11-14 01:44:30.430+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install durable-task
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/durable-task/1.35/durable-task.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/durable-task/1.35/durable-task.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/durable-task/1.35/durable-task.hpi to /usr/local/jenkins/plugins/durable-task.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/durable-task/1.35/durable-task.hpi (redirected to: https://get.jenkins.io/plugins/durable-task/1.35/durable-task.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:44:30.431+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of workflow-durable-task-step on behalf of admin
>2020-11-14 01:44:31.440+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading workflow-durable-task-step
>2020-11-14 01:44:31.440+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install workflow-durable-task-step
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-durable-task-step/2.36/workflow-durable-task-step.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-durable-task-step/2.36/workflow-durable-task-step.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/workflow-durable-task-step/2.36/workflow-durable-task-step.hpi to /usr/local/jenkins/plugins/workflow-durable-task-step.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/workflow-durable-task-step/2.36/workflow-durable-task-step.hpi (redirected to: https://get.jenkins.io/plugins/workflow-durable-task-step/2.36/workflow-durable-task-step.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:44:31.441+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of plugin-util-api on behalf of admin
>2020-11-14 01:44:33.037+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading plugin-util-api
>2020-11-14 01:44:33.037+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install plugin-util-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/plugin-util-api/1.4.0/plugin-util-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/plugin-util-api/1.4.0/plugin-util-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/plugin-util-api/1.4.0/plugin-util-api.hpi to /usr/local/jenkins/plugins/plugin-util-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/plugin-util-api/1.4.0/plugin-util-api.hpi (redirected to: https://get.jenkins.io/plugins/plugin-util-api/1.4.0/plugin-util-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:44:33.037+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of font-awesome-api on behalf of admin
>2020-11-14 01:44:35.412+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading font-awesome-api
>2020-11-14 01:44:35.412+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install font-awesome-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/font-awesome-api/5.15.1-1/font-awesome-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/font-awesome-api/5.15.1-1/font-awesome-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/font-awesome-api/5.15.1-1/font-awesome-api.hpi to /usr/local/jenkins/plugins/font-awesome-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/font-awesome-api/5.15.1-1/font-awesome-api.hpi (redirected to: https://get.jenkins.io/plugins/font-awesome-api/5.15.1-1/font-awesome-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:44:35.413+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of popper-api on behalf of admin
>2020-11-14 01:44:37.471+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading popper-api
>2020-11-14 01:44:37.472+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install popper-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/popper-api/1.16.0-7/popper-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/popper-api/1.16.0-7/popper-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/popper-api/1.16.0-7/popper-api.hpi to /usr/local/jenkins/plugins/popper-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/popper-api/1.16.0-7/popper-api.hpi (redirected to: https://get.jenkins.io/plugins/popper-api/1.16.0-7/popper-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:44:37.472+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of jquery3-api on behalf of admin
>2020-11-14 01:44:39.583+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading jquery3-api
>2020-11-14 01:44:39.583+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install jquery3-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/jquery3-api/3.5.1-2/jquery3-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/jquery3-api/3.5.1-2/jquery3-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/jquery3-api/3.5.1-2/jquery3-api.hpi to /usr/local/jenkins/plugins/jquery3-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/jquery3-api/3.5.1-2/jquery3-api.hpi (redirected to: https://get.jenkins.io/plugins/jquery3-api/3.5.1-2/jquery3-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:44:39.584+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of bootstrap4-api on behalf of admin
>2020-11-14 01:44:41.752+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading bootstrap4-api
>2020-11-14 01:44:41.753+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install bootstrap4-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/bootstrap4-api/4.5.3-1/bootstrap4-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/bootstrap4-api/4.5.3-1/bootstrap4-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/bootstrap4-api/4.5.3-1/bootstrap4-api.hpi to /usr/local/jenkins/plugins/bootstrap4-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/bootstrap4-api/4.5.3-1/bootstrap4-api.hpi (redirected to: https://get.jenkins.io/plugins/bootstrap4-api/4.5.3-1/bootstrap4-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:44:41.753+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of snakeyaml-api on behalf of admin
>2020-11-14 01:44:44.195+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading snakeyaml-api
>2020-11-14 01:44:44.195+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install snakeyaml-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/snakeyaml-api/1.27.0/snakeyaml-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/snakeyaml-api/1.27.0/snakeyaml-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/snakeyaml-api/1.27.0/snakeyaml-api.hpi to /usr/local/jenkins/plugins/snakeyaml-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/snakeyaml-api/1.27.0/snakeyaml-api.hpi (redirected to: https://get.jenkins.io/plugins/snakeyaml-api/1.27.0/snakeyaml-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:44:44.196+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of jackson2-api on behalf of admin
>2020-11-14 01:44:46.543+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading jackson2-api
>2020-11-14 01:44:46.543+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install jackson2-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/jackson2-api/2.11.3/jackson2-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/jackson2-api/2.11.3/jackson2-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/jackson2-api/2.11.3/jackson2-api.hpi to /usr/local/jenkins/plugins/jackson2-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/jackson2-api/2.11.3/jackson2-api.hpi (redirected to: https://get.jenkins.io/plugins/jackson2-api/2.11.3/jackson2-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:44:46.543+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of echarts-api on behalf of admin
>2020-11-14 01:44:50.230+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading echarts-api
>2020-11-14 01:44:50.230+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install echarts-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/echarts-api/4.9.0-2/echarts-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/echarts-api/4.9.0-2/echarts-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/echarts-api/4.9.0-2/echarts-api.hpi to /usr/local/jenkins/plugins/echarts-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/echarts-api/4.9.0-2/echarts-api.hpi (redirected to: https://get.jenkins.io/plugins/echarts-api/4.9.0-2/echarts-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:44:50.230+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of display-url-api on behalf of admin
>2020-11-14 01:45:02.399+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading display-url-api
>2020-11-14 01:45:02.399+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install display-url-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/display-url-api/2.3.3/display-url-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/display-url-api/2.3.3/display-url-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/display-url-api/2.3.3/display-url-api.hpi to /usr/local/jenkins/plugins/display-url-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/display-url-api/2.3.3/display-url-api.hpi (redirected to: https://get.jenkins.io/plugins/display-url-api/2.3.3/display-url-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:45:02.400+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of command-launcher on behalf of admin
>2020-11-14 01:45:06.422+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading command-launcher
>2020-11-14 01:45:06.422+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install command-launcher
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/command-launcher/1.5/command-launcher.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/command-launcher/1.5/command-launcher.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/command-launcher/1.5/command-launcher.hpi to /usr/local/jenkins/plugins/command-launcher.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/command-launcher/1.5/command-launcher.hpi (redirected to: https://get.jenkins.io/plugins/command-launcher/1.5/command-launcher.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:45:06.422+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of bouncycastle-api on behalf of admin
>2020-11-14 01:45:07.701+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading bouncycastle-api
>2020-11-14 01:45:07.701+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install bouncycastle-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/bouncycastle-api/2.18/bouncycastle-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/bouncycastle-api/2.18/bouncycastle-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/bouncycastle-api/2.18/bouncycastle-api.hpi to /usr/local/jenkins/plugins/bouncycastle-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/bouncycastle-api/2.18/bouncycastle-api.hpi (redirected to: https://get.jenkins.io/plugins/bouncycastle-api/2.18/bouncycastle-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:45:07.702+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of ace-editor on behalf of admin
>2020-11-14 01:45:17.514+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading ace-editor
>2020-11-14 01:45:17.514+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install ace-editor
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/ace-editor/1.1/ace-editor.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/ace-editor/1.1/ace-editor.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/ace-editor/1.1/ace-editor.hpi to /usr/local/jenkins/plugins/ace-editor.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/ace-editor/1.1/ace-editor.hpi (redirected to: https://get.jenkins.io/plugins/ace-editor/1.1/ace-editor.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:45:17.514+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of workflow-scm-step on behalf of admin
>2020-11-14 01:45:19.350+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading workflow-scm-step
>2020-11-14 01:45:19.350+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install workflow-scm-step
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-scm-step/2.11/workflow-scm-step.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-scm-step/2.11/workflow-scm-step.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/workflow-scm-step/2.11/workflow-scm-step.hpi to /usr/local/jenkins/plugins/workflow-scm-step.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/workflow-scm-step/2.11/workflow-scm-step.hpi (redirected to: https://get.jenkins.io/plugins/workflow-scm-step/2.11/workflow-scm-step.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:45:19.350+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of workflow-cps on behalf of admin
>2020-11-14 01:45:39.358+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading workflow-cps
>2020-11-14 01:45:39.359+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install workflow-cps
>java.net.SocketTimeoutException: connect timed out
>	at java.net.PlainSocketImpl.socketConnect(Native Method)
>	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
>	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
>	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
>	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
>	at java.net.Socket.connect(Socket.java:607)
>	at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:681)
>	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
>	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
>	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
>	at sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:264)
>	at sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:367)
>	at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:191)
>	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1162)
>	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1056)
>	at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:177)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1570)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.net.SocketTimeoutException: connect timed out
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/workflow-cps/2.85/workflow-cps.hpi to /usr/local/jenkins/plugins/workflow-cps.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/workflow-cps/2.85/workflow-cps.hpi
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:45:39.359+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of workflow-job on behalf of admin
>2020-11-14 01:45:42.764+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading workflow-job
>2020-11-14 01:45:42.765+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install workflow-job
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-job/2.40/workflow-job.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-job/2.40/workflow-job.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/workflow-job/2.40/workflow-job.hpi to /usr/local/jenkins/plugins/workflow-job.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/workflow-job/2.40/workflow-job.hpi (redirected to: https://get.jenkins.io/plugins/workflow-job/2.40/workflow-job.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:45:42.765+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of checks-api on behalf of admin
>2020-11-14 01:46:02.095+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading checks-api
>2020-11-14 01:46:02.096+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install checks-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/checks-api/1.1.0/checks-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/checks-api/1.1.0/checks-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/checks-api/1.1.0/checks-api.hpi to /usr/local/jenkins/plugins/checks-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/checks-api/1.1.0/checks-api.hpi (redirected to: https://get.jenkins.io/plugins/checks-api/1.1.0/checks-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:46:02.096+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of junit on behalf of admin
>2020-11-14 01:46:05.530+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading junit
>2020-11-14 01:46:05.531+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install junit
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/junit/1.43/junit.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/junit/1.43/junit.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/junit/1.43/junit.hpi to /usr/local/jenkins/plugins/junit.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/junit/1.43/junit.hpi (redirected to: https://get.jenkins.io/plugins/junit/1.43/junit.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:46:05.531+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of matrix-project on behalf of admin
>2020-11-14 01:46:24.450+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading matrix-project
>2020-11-14 01:46:24.450+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install matrix-project
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/matrix-project/1.18/matrix-project.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/matrix-project/1.18/matrix-project.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/matrix-project/1.18/matrix-project.hpi to /usr/local/jenkins/plugins/matrix-project.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/matrix-project/1.18/matrix-project.hpi (redirected to: https://get.jenkins.io/plugins/matrix-project/1.18/matrix-project.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:46:24.450+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of resource-disposer on behalf of admin
>2020-11-14 01:46:44.560+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading resource-disposer
>2020-11-14 01:46:44.561+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install resource-disposer
>java.net.SocketTimeoutException: connect timed out
>	at java.net.PlainSocketImpl.socketConnect(Native Method)
>	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
>	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
>	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
>	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
>	at java.net.Socket.connect(Socket.java:607)
>	at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:681)
>	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
>	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
>	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
>	at sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:264)
>	at sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:367)
>	at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:191)
>	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1162)
>	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1056)
>	at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:177)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1570)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.net.SocketTimeoutException: connect timed out
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/resource-disposer/0.14/resource-disposer.hpi to /usr/local/jenkins/plugins/resource-disposer.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/resource-disposer/0.14/resource-disposer.hpi
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:46:44.561+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of ws-cleanup on behalf of admin
>2020-11-14 01:46:47.987+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading ws-cleanup
>2020-11-14 01:46:47.987+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install ws-cleanup
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/ws-cleanup/0.38/ws-cleanup.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/ws-cleanup/0.38/ws-cleanup.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/ws-cleanup/0.38/ws-cleanup.hpi to /usr/local/jenkins/plugins/ws-cleanup.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/ws-cleanup/0.38/ws-cleanup.hpi (redirected to: https://get.jenkins.io/plugins/ws-cleanup/0.38/ws-cleanup.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:46:47.988+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of pipeline-milestone-step on behalf of admin
>2020-11-14 01:46:54.741+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading pipeline-milestone-step
>2020-11-14 01:46:54.742+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install pipeline-milestone-step
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/pipeline-milestone-step/1.3.1/pipeline-milestone-step.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/pipeline-milestone-step/1.3.1/pipeline-milestone-step.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/pipeline-milestone-step/1.3.1/pipeline-milestone-step.hpi to /usr/local/jenkins/plugins/pipeline-milestone-step.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/pipeline-milestone-step/1.3.1/pipeline-milestone-step.hpi (redirected to: https://get.jenkins.io/plugins/pipeline-milestone-step/1.3.1/pipeline-milestone-step.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:46:54.742+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of jquery-detached on behalf of admin
>2020-11-14 01:46:58.949+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading jquery-detached
>2020-11-14 01:46:58.949+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install jquery-detached
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/jquery-detached/1.2.1/jquery-detached.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/jquery-detached/1.2.1/jquery-detached.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/jquery-detached/1.2.1/jquery-detached.hpi to /usr/local/jenkins/plugins/jquery-detached.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/jquery-detached/1.2.1/jquery-detached.hpi (redirected to: https://get.jenkins.io/plugins/jquery-detached/1.2.1/jquery-detached.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:46:58.950+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of pipeline-input-step on behalf of admin
>2020-11-14 01:47:01.338+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading pipeline-input-step
>2020-11-14 01:47:01.339+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install pipeline-input-step
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/pipeline-input-step/2.12/pipeline-input-step.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/pipeline-input-step/2.12/pipeline-input-step.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/pipeline-input-step/2.12/pipeline-input-step.hpi to /usr/local/jenkins/plugins/pipeline-input-step.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/pipeline-input-step/2.12/pipeline-input-step.hpi (redirected to: https://get.jenkins.io/plugins/pipeline-input-step/2.12/pipeline-input-step.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:47:01.339+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of pipeline-stage-step on behalf of admin
>2020-11-14 01:47:41.436+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading pipeline-stage-step
>2020-11-14 01:47:41.436+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install pipeline-stage-step
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/pipeline-stage-step/2.5/pipeline-stage-step.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/pipeline-stage-step/2.5/pipeline-stage-step.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/pipeline-stage-step/2.5/pipeline-stage-step.hpi to /usr/local/jenkins/plugins/pipeline-stage-step.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/pipeline-stage-step/2.5/pipeline-stage-step.hpi (redirected to: https://get.jenkins.io/plugins/pipeline-stage-step/2.5/pipeline-stage-step.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:47:41.437+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of pipeline-graph-analysis on behalf of admin
>2020-11-14 01:47:43.448+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading pipeline-graph-analysis
>2020-11-14 01:47:43.448+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install pipeline-graph-analysis
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/pipeline-graph-analysis/1.10/pipeline-graph-analysis.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/pipeline-graph-analysis/1.10/pipeline-graph-analysis.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/pipeline-graph-analysis/1.10/pipeline-graph-analysis.hpi to /usr/local/jenkins/plugins/pipeline-graph-analysis.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/pipeline-graph-analysis/1.10/pipeline-graph-analysis.hpi (redirected to: https://get.jenkins.io/plugins/pipeline-graph-analysis/1.10/pipeline-graph-analysis.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:47:43.449+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of pipeline-rest-api on behalf of admin
>2020-11-14 01:47:45.147+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading pipeline-rest-api
>2020-11-14 01:47:45.148+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install pipeline-rest-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/pipeline-rest-api/2.18/pipeline-rest-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/pipeline-rest-api/2.18/pipeline-rest-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/pipeline-rest-api/2.18/pipeline-rest-api.hpi to /usr/local/jenkins/plugins/pipeline-rest-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/pipeline-rest-api/2.18/pipeline-rest-api.hpi (redirected to: https://get.jenkins.io/plugins/pipeline-rest-api/2.18/pipeline-rest-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:47:45.148+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of handlebars on behalf of admin
>2020-11-14 01:47:47.214+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading handlebars
>2020-11-14 01:47:47.215+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install handlebars
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/handlebars/1.1.1/handlebars.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/handlebars/1.1.1/handlebars.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/handlebars/1.1.1/handlebars.hpi to /usr/local/jenkins/plugins/handlebars.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/handlebars/1.1.1/handlebars.hpi (redirected to: https://get.jenkins.io/plugins/handlebars/1.1.1/handlebars.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:47:47.215+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of momentjs on behalf of admin
>2020-11-14 01:47:49.049+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading momentjs
>2020-11-14 01:47:49.049+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install momentjs
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/momentjs/1.1.1/momentjs.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/momentjs/1.1.1/momentjs.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/momentjs/1.1.1/momentjs.hpi to /usr/local/jenkins/plugins/momentjs.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/momentjs/1.1.1/momentjs.hpi (redirected to: https://get.jenkins.io/plugins/momentjs/1.1.1/momentjs.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:47:49.050+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of pipeline-stage-view on behalf of admin
>2020-11-14 01:47:51.485+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading pipeline-stage-view
>2020-11-14 01:47:51.486+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install pipeline-stage-view
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/pipeline-stage-view/2.18/pipeline-stage-view.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/pipeline-stage-view/2.18/pipeline-stage-view.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/pipeline-stage-view/2.18/pipeline-stage-view.hpi to /usr/local/jenkins/plugins/pipeline-stage-view.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/pipeline-stage-view/2.18/pipeline-stage-view.hpi (redirected to: https://get.jenkins.io/plugins/pipeline-stage-view/2.18/pipeline-stage-view.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:47:51.486+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of pipeline-build-step on behalf of admin
>2020-11-14 01:47:52.236+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading pipeline-build-step
>2020-11-14 01:47:52.237+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install pipeline-build-step
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/pipeline-build-step/2.13/pipeline-build-step.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/pipeline-build-step/2.13/pipeline-build-step.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/pipeline-build-step/2.13/pipeline-build-step.hpi to /usr/local/jenkins/plugins/pipeline-build-step.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/pipeline-build-step/2.13/pipeline-build-step.hpi (redirected to: https://get.jenkins.io/plugins/pipeline-build-step/2.13/pipeline-build-step.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:47:52.237+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of pipeline-model-api on behalf of admin
>2020-11-14 01:47:55.171+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading pipeline-model-api
>2020-11-14 01:47:55.171+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install pipeline-model-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/pipeline-model-api/1.7.2/pipeline-model-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/pipeline-model-api/1.7.2/pipeline-model-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/pipeline-model-api/1.7.2/pipeline-model-api.hpi to /usr/local/jenkins/plugins/pipeline-model-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/pipeline-model-api/1.7.2/pipeline-model-api.hpi (redirected to: https://get.jenkins.io/plugins/pipeline-model-api/1.7.2/pipeline-model-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:47:55.172+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of pipeline-model-extensions on behalf of admin
>2020-11-14 01:47:57.411+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading pipeline-model-extensions
>2020-11-14 01:47:57.412+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install pipeline-model-extensions
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/pipeline-model-extensions/1.7.2/pipeline-model-extensions.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/pipeline-model-extensions/1.7.2/pipeline-model-extensions.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/pipeline-model-extensions/1.7.2/pipeline-model-extensions.hpi to /usr/local/jenkins/plugins/pipeline-model-extensions.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/pipeline-model-extensions/1.7.2/pipeline-model-extensions.hpi (redirected to: https://get.jenkins.io/plugins/pipeline-model-extensions/1.7.2/pipeline-model-extensions.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:47:57.412+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of apache-httpcomponents-client-4-api on behalf of admin
>2020-11-14 01:47:58.462+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading apache-httpcomponents-client-4-api
>2020-11-14 01:47:58.463+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install apache-httpcomponents-client-4-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/apache-httpcomponents-client-4-api/4.5.10-2.0/apache-httpcomponents-client-4-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/apache-httpcomponents-client-4-api/4.5.10-2.0/apache-httpcomponents-client-4-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/apache-httpcomponents-client-4-api/4.5.10-2.0/apache-httpcomponents-client-4-api.hpi to /usr/local/jenkins/plugins/apache-httpcomponents-client-4-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/apache-httpcomponents-client-4-api/4.5.10-2.0/apache-httpcomponents-client-4-api.hpi (redirected to: https://get.jenkins.io/plugins/apache-httpcomponents-client-4-api/4.5.10-2.0/apache-httpcomponents-client-4-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:47:58.463+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of jsch on behalf of admin
>2020-11-14 01:47:59.425+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading jsch
>2020-11-14 01:47:59.425+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install jsch
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/jsch/0.1.55.2/jsch.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/jsch/0.1.55.2/jsch.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/jsch/0.1.55.2/jsch.hpi to /usr/local/jenkins/plugins/jsch.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/jsch/0.1.55.2/jsch.hpi (redirected to: https://get.jenkins.io/plugins/jsch/0.1.55.2/jsch.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:47:59.426+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of git-client on behalf of admin
>2020-11-14 01:48:00.428+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading git-client
>2020-11-14 01:48:00.429+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install git-client
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/git-client/3.5.1/git-client.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/git-client/3.5.1/git-client.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/git-client/3.5.1/git-client.hpi to /usr/local/jenkins/plugins/git-client.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/git-client/3.5.1/git-client.hpi (redirected to: https://get.jenkins.io/plugins/git-client/3.5.1/git-client.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:48:00.429+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of git-server on behalf of admin
>2020-11-14 01:48:01.596+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading git-server
>2020-11-14 01:48:01.596+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install git-server
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/git-server/1.9/git-server.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/git-server/1.9/git-server.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/git-server/1.9/git-server.hpi to /usr/local/jenkins/plugins/git-server.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/git-server/1.9/git-server.hpi (redirected to: https://get.jenkins.io/plugins/git-server/1.9/git-server.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:48:01.597+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of workflow-cps-global-lib on behalf of admin
>2020-11-14 01:48:03.853+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading workflow-cps-global-lib
>2020-11-14 01:48:03.854+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install workflow-cps-global-lib
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-cps-global-lib/2.17/workflow-cps-global-lib.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-cps-global-lib/2.17/workflow-cps-global-lib.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/workflow-cps-global-lib/2.17/workflow-cps-global-lib.hpi to /usr/local/jenkins/plugins/workflow-cps-global-lib.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/workflow-cps-global-lib/2.17/workflow-cps-global-lib.hpi (redirected to: https://get.jenkins.io/plugins/workflow-cps-global-lib/2.17/workflow-cps-global-lib.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:48:03.854+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of mailer on behalf of admin
>2020-11-14 01:48:06.249+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading mailer
>2020-11-14 01:48:06.249+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install mailer
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/mailer/1.32.1/mailer.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/mailer/1.32.1/mailer.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/mailer/1.32.1/mailer.hpi to /usr/local/jenkins/plugins/mailer.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/mailer/1.32.1/mailer.hpi (redirected to: https://get.jenkins.io/plugins/mailer/1.32.1/mailer.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:48:06.250+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of branch-api on behalf of admin
>2020-11-14 01:48:10.597+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading branch-api
>2020-11-14 01:48:10.597+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install branch-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/branch-api/2.6.2/branch-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/branch-api/2.6.2/branch-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/branch-api/2.6.2/branch-api.hpi to /usr/local/jenkins/plugins/branch-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/branch-api/2.6.2/branch-api.hpi (redirected to: https://get.jenkins.io/plugins/branch-api/2.6.2/branch-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:48:10.597+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of workflow-multibranch on behalf of admin
>2020-11-14 01:48:12.334+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading workflow-multibranch
>2020-11-14 01:48:12.334+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install workflow-multibranch
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-multibranch/2.22/workflow-multibranch.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-multibranch/2.22/workflow-multibranch.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/workflow-multibranch/2.22/workflow-multibranch.hpi to /usr/local/jenkins/plugins/workflow-multibranch.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/workflow-multibranch/2.22/workflow-multibranch.hpi (redirected to: https://get.jenkins.io/plugins/workflow-multibranch/2.22/workflow-multibranch.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:48:12.335+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of pipeline-stage-tags-metadata on behalf of admin
>2020-11-14 01:48:13.536+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading pipeline-stage-tags-metadata
>2020-11-14 01:48:13.537+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install pipeline-stage-tags-metadata
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/pipeline-stage-tags-metadata/1.7.2/pipeline-stage-tags-metadata.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/pipeline-stage-tags-metadata/1.7.2/pipeline-stage-tags-metadata.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/pipeline-stage-tags-metadata/1.7.2/pipeline-stage-tags-metadata.hpi to /usr/local/jenkins/plugins/pipeline-stage-tags-metadata.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/pipeline-stage-tags-metadata/1.7.2/pipeline-stage-tags-metadata.hpi (redirected to: https://get.jenkins.io/plugins/pipeline-stage-tags-metadata/1.7.2/pipeline-stage-tags-metadata.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:48:13.537+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of workflow-basic-steps on behalf of admin
>2020-11-14 01:48:14.917+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading workflow-basic-steps
>2020-11-14 01:48:14.918+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install workflow-basic-steps
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-basic-steps/2.22/workflow-basic-steps.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-basic-steps/2.22/workflow-basic-steps.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/workflow-basic-steps/2.22/workflow-basic-steps.hpi to /usr/local/jenkins/plugins/workflow-basic-steps.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/workflow-basic-steps/2.22/workflow-basic-steps.hpi (redirected to: https://get.jenkins.io/plugins/workflow-basic-steps/2.22/workflow-basic-steps.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:48:14.918+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of pipeline-model-definition on behalf of admin
>2020-11-14 01:48:17.183+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading pipeline-model-definition
>2020-11-14 01:48:17.183+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install pipeline-model-definition
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/pipeline-model-definition/1.7.2/pipeline-model-definition.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/pipeline-model-definition/1.7.2/pipeline-model-definition.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/pipeline-model-definition/1.7.2/pipeline-model-definition.hpi to /usr/local/jenkins/plugins/pipeline-model-definition.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/pipeline-model-definition/1.7.2/pipeline-model-definition.hpi (redirected to: https://get.jenkins.io/plugins/pipeline-model-definition/1.7.2/pipeline-model-definition.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:48:17.184+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of lockable-resources on behalf of admin
>2020-11-14 01:48:37.240+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading lockable-resources
>2020-11-14 01:48:37.241+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install lockable-resources
>java.net.SocketTimeoutException: connect timed out
>	at java.net.PlainSocketImpl.socketConnect(Native Method)
>	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
>	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
>	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
>	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
>	at java.net.Socket.connect(Socket.java:607)
>	at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:681)
>	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
>	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
>	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
>	at sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:264)
>	at sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:367)
>	at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:191)
>	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1162)
>	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1056)
>	at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:177)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1570)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.net.SocketTimeoutException: connect timed out
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/lockable-resources/2.10/lockable-resources.hpi to /usr/local/jenkins/plugins/lockable-resources.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/lockable-resources/2.10/lockable-resources.hpi
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:48:37.241+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of workflow-aggregator on behalf of admin
>2020-11-14 01:48:39.259+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading workflow-aggregator
>2020-11-14 01:48:39.260+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install workflow-aggregator
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-aggregator/2.6/workflow-aggregator.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-aggregator/2.6/workflow-aggregator.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/workflow-aggregator/2.6/workflow-aggregator.hpi to /usr/local/jenkins/plugins/workflow-aggregator.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/workflow-aggregator/2.6/workflow-aggregator.hpi (redirected to: https://get.jenkins.io/plugins/workflow-aggregator/2.6/workflow-aggregator.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:48:39.260+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of okhttp-api on behalf of admin
>2020-11-14 01:48:40.213+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading okhttp-api
>2020-11-14 01:48:40.213+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install okhttp-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/okhttp-api/3.14.9/okhttp-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/okhttp-api/3.14.9/okhttp-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/okhttp-api/3.14.9/okhttp-api.hpi to /usr/local/jenkins/plugins/okhttp-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/okhttp-api/3.14.9/okhttp-api.hpi (redirected to: https://get.jenkins.io/plugins/okhttp-api/3.14.9/okhttp-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:48:40.214+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of github-api on behalf of admin
>2020-11-14 01:48:41.080+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading github-api
>2020-11-14 01:48:41.081+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install github-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/github-api/1.116/github-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/github-api/1.116/github-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/github-api/1.116/github-api.hpi to /usr/local/jenkins/plugins/github-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/github-api/1.116/github-api.hpi (redirected to: https://get.jenkins.io/plugins/github-api/1.116/github-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:48:41.081+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of git on behalf of admin
>2020-11-14 01:48:42.934+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading git
>2020-11-14 01:48:42.935+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install git
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/git/4.4.5/git.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/git/4.4.5/git.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/git/4.4.5/git.hpi to /usr/local/jenkins/plugins/git.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/git/4.4.5/git.hpi (redirected to: https://get.jenkins.io/plugins/git/4.4.5/git.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:48:42.935+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of github on behalf of admin
>2020-11-14 01:48:47.412+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading github
>2020-11-14 01:48:47.413+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install github
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/github/1.32.0/github.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/github/1.32.0/github.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/github/1.32.0/github.hpi to /usr/local/jenkins/plugins/github.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/github/1.32.0/github.hpi (redirected to: https://get.jenkins.io/plugins/github/1.32.0/github.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:48:47.413+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of github-branch-source on behalf of admin
>2020-11-14 01:48:57.068+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading github-branch-source
>2020-11-14 01:48:57.068+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install github-branch-source
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/github-branch-source/2.9.1/github-branch-source.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/github-branch-source/2.9.1/github-branch-source.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/github-branch-source/2.9.1/github-branch-source.hpi to /usr/local/jenkins/plugins/github-branch-source.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/github-branch-source/2.9.1/github-branch-source.hpi (redirected to: https://get.jenkins.io/plugins/github-branch-source/2.9.1/github-branch-source.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:48:57.069+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of pipeline-stage-view on behalf of admin
>2020-11-14 01:48:59.002+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading pipeline-stage-view
>2020-11-14 01:48:59.003+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install pipeline-stage-view
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/pipeline-stage-view/2.18/pipeline-stage-view.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/pipeline-stage-view/2.18/pipeline-stage-view.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/pipeline-stage-view/2.18/pipeline-stage-view.hpi to /usr/local/jenkins/plugins/pipeline-stage-view.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/pipeline-stage-view/2.18/pipeline-stage-view.hpi (redirected to: https://get.jenkins.io/plugins/pipeline-stage-view/2.18/pipeline-stage-view.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:48:59.003+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of git on behalf of admin
>2020-11-14 01:48:59.848+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading git
>2020-11-14 01:48:59.849+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install git
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/git/4.4.5/git.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/git/4.4.5/git.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/git/4.4.5/git.hpi to /usr/local/jenkins/plugins/git.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/git/4.4.5/git.hpi (redirected to: https://get.jenkins.io/plugins/git/4.4.5/git.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:48:59.849+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of ssh-slaves on behalf of admin
>2020-11-14 01:49:00.715+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading ssh-slaves
>2020-11-14 01:49:00.715+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install ssh-slaves
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/ssh-slaves/1.31.2/ssh-slaves.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/ssh-slaves/1.31.2/ssh-slaves.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/ssh-slaves/1.31.2/ssh-slaves.hpi to /usr/local/jenkins/plugins/ssh-slaves.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/ssh-slaves/1.31.2/ssh-slaves.hpi (redirected to: https://get.jenkins.io/plugins/ssh-slaves/1.31.2/ssh-slaves.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:49:00.716+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of matrix-auth on behalf of admin
>2020-11-14 01:49:01.860+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading matrix-auth
>2020-11-14 01:49:01.860+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install matrix-auth
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/matrix-auth/2.6.4/matrix-auth.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/matrix-auth/2.6.4/matrix-auth.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/matrix-auth/2.6.4/matrix-auth.hpi to /usr/local/jenkins/plugins/matrix-auth.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/matrix-auth/2.6.4/matrix-auth.hpi (redirected to: https://get.jenkins.io/plugins/matrix-auth/2.6.4/matrix-auth.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:49:01.861+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of email-ext on behalf of admin
>2020-11-14 01:49:03.849+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading email-ext
>2020-11-14 01:49:03.850+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install email-ext
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/email-ext/2.79/email-ext.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/email-ext/2.79/email-ext.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/email-ext/2.79/email-ext.hpi to /usr/local/jenkins/plugins/email-ext.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/email-ext/2.79/email-ext.hpi (redirected to: https://get.jenkins.io/plugins/email-ext/2.79/email-ext.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:49:03.850+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of mailer on behalf of admin
>2020-11-14 01:49:05.071+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading mailer
>2020-11-14 01:49:05.071+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install mailer
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/mailer/1.32.1/mailer.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/mailer/1.32.1/mailer.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/mailer/1.32.1/mailer.hpi to /usr/local/jenkins/plugins/mailer.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/mailer/1.32.1/mailer.hpi (redirected to: https://get.jenkins.io/plugins/mailer/1.32.1/mailer.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:49:05.072+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of ssh-agent on behalf of admin
>2020-11-14 01:49:06.023+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading ssh-agent
>2020-11-14 01:49:06.024+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install ssh-agent
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/ssh-agent/1.20/ssh-agent.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/ssh-agent/1.20/ssh-agent.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/ssh-agent/1.20/ssh-agent.hpi to /usr/local/jenkins/plugins/ssh-agent.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/ssh-agent/1.20/ssh-agent.hpi (redirected to: https://get.jenkins.io/plugins/ssh-agent/1.20/ssh-agent.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:49:06.024+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of embeddable-build-status on behalf of admin
>2020-11-14 01:49:50.103+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading embeddable-build-status
>2020-11-14 01:49:50.103+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install embeddable-build-status
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/embeddable-build-status/2.0.3/embeddable-build-status.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/embeddable-build-status/2.0.3/embeddable-build-status.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/embeddable-build-status/2.0.3/embeddable-build-status.hpi to /usr/local/jenkins/plugins/embeddable-build-status.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/embeddable-build-status/2.0.3/embeddable-build-status.hpi (redirected to: https://get.jenkins.io/plugins/embeddable-build-status/2.0.3/embeddable-build-status.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:49:50.103+0000 [id=90]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of active-directory on behalf of admin
>2020-11-14 01:49:54.505+0000 [id=90]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading active-directory
>2020-11-14 01:49:54.505+0000 [id=90]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install active-directory
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/active-directory/2.20/active-directory.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/active-directory/2.20/active-directory.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/active-directory/2.20/active-directory.hpi to /usr/local/jenkins/plugins/active-directory.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/active-directory/2.20/active-directory.hpi (redirected to: https://get.jenkins.io/plugins/active-directory/2.20/active-directory.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:49:54.505+0000 [id=90]	INFO	h.m.UpdateCenter$CompleteBatchJob#run: Completing installing of plugin batch?
>2020-11-14 01:49:54.562+0000 [id=251]	INFO	jenkins.InitReactorRunner$1#onAttained: Started initialization
>2020-11-14 01:49:54.564+0000 [id=255]	INFO	jenkins.InitReactorRunner$1#onAttained: Listed all plugins
>2020-11-14 01:49:54.565+0000 [id=261]	INFO	jenkins.InitReactorRunner$1#onAttained: Prepared all plugins
>2020-11-14 01:49:54.566+0000 [id=265]	INFO	jenkins.InitReactorRunner$1#onAttained: Started all plugins
>2020-11-14 01:49:54.567+0000 [id=265]	INFO	jenkins.InitReactorRunner$1#onAttained: Augmented all extensions
>2020-11-14 01:49:54.567+0000 [id=265]	INFO	jenkins.InitReactorRunner$1#onAttained: System config loaded
>2020-11-14 01:49:54.567+0000 [id=261]	INFO	jenkins.InitReactorRunner$1#onAttained: System config adapted
>2020-11-14 01:49:54.568+0000 [id=256]	INFO	jenkins.InitReactorRunner$1#onAttained: Loaded all jobs
>2020-11-14 01:49:54.568+0000 [id=258]	INFO	jenkins.InitReactorRunner$1#onAttained: Configuration for all jobs updated
>2020-11-14 01:49:54.569+0000 [id=262]	INFO	jenkins.InitReactorRunner$1#onAttained: Completed initialization
>2020-11-14 01:49:54.574+0000 [id=90]	INFO	h.m.UpdateCenter$CompleteBatchJob#run: Completed installation of 0 plugins in 5 min 37 sec
>2020-11-14 01:50:29.801+0000 [id=70]	INFO	hudson.PluginManager#install: Starting installation of a batch of 32 plugins plus their dependencies
>2020-11-14 01:50:29.802+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of cloudbees-folder on behalf of admin
>2020-11-14 01:50:30.270+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading cloudbees-folder
>2020-11-14 01:50:30.270+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install cloudbees-folder
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/cloudbees-folder/6.15/cloudbees-folder.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/cloudbees-folder/6.15/cloudbees-folder.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/cloudbees-folder/6.15/cloudbees-folder.hpi to /usr/local/jenkins/plugins/cloudbees-folder.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/cloudbees-folder/6.15/cloudbees-folder.hpi (redirected to: https://get.jenkins.io/plugins/cloudbees-folder/6.15/cloudbees-folder.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:30.270+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of trilead-api on behalf of admin
>2020-11-14 01:50:30.620+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading trilead-api
>2020-11-14 01:50:30.620+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install trilead-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/trilead-api/1.0.12/trilead-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/trilead-api/1.0.12/trilead-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/trilead-api/1.0.12/trilead-api.hpi to /usr/local/jenkins/plugins/trilead-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/trilead-api/1.0.12/trilead-api.hpi (redirected to: https://get.jenkins.io/plugins/trilead-api/1.0.12/trilead-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:30.620+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of antisamy-markup-formatter on behalf of admin
>2020-11-14 01:50:30.997+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading antisamy-markup-formatter
>2020-11-14 01:50:30.997+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install antisamy-markup-formatter
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/antisamy-markup-formatter/2.1/antisamy-markup-formatter.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/antisamy-markup-formatter/2.1/antisamy-markup-formatter.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/antisamy-markup-formatter/2.1/antisamy-markup-formatter.hpi to /usr/local/jenkins/plugins/antisamy-markup-formatter.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/antisamy-markup-formatter/2.1/antisamy-markup-formatter.hpi (redirected to: https://get.jenkins.io/plugins/antisamy-markup-formatter/2.1/antisamy-markup-formatter.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:30.997+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of jdk-tool on behalf of admin
>2020-11-14 01:50:31.355+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading jdk-tool
>2020-11-14 01:50:31.355+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install jdk-tool
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/jdk-tool/1.4/jdk-tool.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/jdk-tool/1.4/jdk-tool.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/jdk-tool/1.4/jdk-tool.hpi to /usr/local/jenkins/plugins/jdk-tool.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/jdk-tool/1.4/jdk-tool.hpi (redirected to: https://get.jenkins.io/plugins/jdk-tool/1.4/jdk-tool.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:31.356+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of structs on behalf of admin
>2020-11-14 01:50:31.698+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading structs
>2020-11-14 01:50:31.698+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install structs
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/structs/1.20/structs.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/structs/1.20/structs.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/structs/1.20/structs.hpi to /usr/local/jenkins/plugins/structs.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/structs/1.20/structs.hpi (redirected to: https://get.jenkins.io/plugins/structs/1.20/structs.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:31.699+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of workflow-step-api on behalf of admin
>2020-11-14 01:50:32.085+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading workflow-step-api
>2020-11-14 01:50:32.086+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install workflow-step-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-step-api/2.23/workflow-step-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-step-api/2.23/workflow-step-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/workflow-step-api/2.23/workflow-step-api.hpi to /usr/local/jenkins/plugins/workflow-step-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/workflow-step-api/2.23/workflow-step-api.hpi (redirected to: https://get.jenkins.io/plugins/workflow-step-api/2.23/workflow-step-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:32.086+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of token-macro on behalf of admin
>2020-11-14 01:50:32.414+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading token-macro
>2020-11-14 01:50:32.414+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install token-macro
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/token-macro/2.12/token-macro.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/token-macro/2.12/token-macro.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/token-macro/2.12/token-macro.hpi to /usr/local/jenkins/plugins/token-macro.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/token-macro/2.12/token-macro.hpi (redirected to: https://get.jenkins.io/plugins/token-macro/2.12/token-macro.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:32.415+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of build-timeout on behalf of admin
>2020-11-14 01:50:32.767+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading build-timeout
>2020-11-14 01:50:32.768+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install build-timeout
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/build-timeout/1.20/build-timeout.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/build-timeout/1.20/build-timeout.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/build-timeout/1.20/build-timeout.hpi to /usr/local/jenkins/plugins/build-timeout.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/build-timeout/1.20/build-timeout.hpi (redirected to: https://get.jenkins.io/plugins/build-timeout/1.20/build-timeout.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:32.768+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of credentials on behalf of admin
>2020-11-14 01:50:33.110+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading credentials
>2020-11-14 01:50:33.111+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install credentials
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/credentials/2.3.13/credentials.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/credentials/2.3.13/credentials.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/credentials/2.3.13/credentials.hpi to /usr/local/jenkins/plugins/credentials.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/credentials/2.3.13/credentials.hpi (redirected to: https://get.jenkins.io/plugins/credentials/2.3.13/credentials.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:33.111+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of plain-credentials on behalf of admin
>2020-11-14 01:50:33.447+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading plain-credentials
>2020-11-14 01:50:33.448+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install plain-credentials
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/plain-credentials/1.7/plain-credentials.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/plain-credentials/1.7/plain-credentials.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/plain-credentials/1.7/plain-credentials.hpi to /usr/local/jenkins/plugins/plain-credentials.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/plain-credentials/1.7/plain-credentials.hpi (redirected to: https://get.jenkins.io/plugins/plain-credentials/1.7/plain-credentials.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:33.448+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of ssh-credentials on behalf of admin
>2020-11-14 01:50:33.781+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading ssh-credentials
>2020-11-14 01:50:33.782+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install ssh-credentials
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/ssh-credentials/1.18.1/ssh-credentials.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/ssh-credentials/1.18.1/ssh-credentials.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/ssh-credentials/1.18.1/ssh-credentials.hpi to /usr/local/jenkins/plugins/ssh-credentials.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/ssh-credentials/1.18.1/ssh-credentials.hpi (redirected to: https://get.jenkins.io/plugins/ssh-credentials/1.18.1/ssh-credentials.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:33.782+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of credentials-binding on behalf of admin
>2020-11-14 01:50:34.151+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading credentials-binding
>2020-11-14 01:50:34.152+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install credentials-binding
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/credentials-binding/1.24/credentials-binding.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/credentials-binding/1.24/credentials-binding.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/credentials-binding/1.24/credentials-binding.hpi to /usr/local/jenkins/plugins/credentials-binding.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/credentials-binding/1.24/credentials-binding.hpi (redirected to: https://get.jenkins.io/plugins/credentials-binding/1.24/credentials-binding.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:34.152+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of scm-api on behalf of admin
>2020-11-14 01:50:34.491+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading scm-api
>2020-11-14 01:50:34.492+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install scm-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/scm-api/2.6.4/scm-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/scm-api/2.6.4/scm-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/scm-api/2.6.4/scm-api.hpi to /usr/local/jenkins/plugins/scm-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/scm-api/2.6.4/scm-api.hpi (redirected to: https://get.jenkins.io/plugins/scm-api/2.6.4/scm-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:34.492+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of workflow-api on behalf of admin
>2020-11-14 01:50:34.832+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading workflow-api
>2020-11-14 01:50:34.832+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install workflow-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-api/2.40/workflow-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-api/2.40/workflow-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/workflow-api/2.40/workflow-api.hpi to /usr/local/jenkins/plugins/workflow-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/workflow-api/2.40/workflow-api.hpi (redirected to: https://get.jenkins.io/plugins/workflow-api/2.40/workflow-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:34.833+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of timestamper on behalf of admin
>2020-11-14 01:50:35.170+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading timestamper
>2020-11-14 01:50:35.170+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install timestamper
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/timestamper/1.11.8/timestamper.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/timestamper/1.11.8/timestamper.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/timestamper/1.11.8/timestamper.hpi to /usr/local/jenkins/plugins/timestamper.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/timestamper/1.11.8/timestamper.hpi (redirected to: https://get.jenkins.io/plugins/timestamper/1.11.8/timestamper.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:35.170+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of script-security on behalf of admin
>2020-11-14 01:50:35.515+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading script-security
>2020-11-14 01:50:35.515+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install script-security
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/script-security/1.75/script-security.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/script-security/1.75/script-security.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/script-security/1.75/script-security.hpi to /usr/local/jenkins/plugins/script-security.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/script-security/1.75/script-security.hpi (redirected to: https://get.jenkins.io/plugins/script-security/1.75/script-security.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:35.515+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of workflow-support on behalf of admin
>2020-11-14 01:50:35.857+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading workflow-support
>2020-11-14 01:50:35.857+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install workflow-support
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-support/3.6/workflow-support.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-support/3.6/workflow-support.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/workflow-support/3.6/workflow-support.hpi to /usr/local/jenkins/plugins/workflow-support.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/workflow-support/3.6/workflow-support.hpi (redirected to: https://get.jenkins.io/plugins/workflow-support/3.6/workflow-support.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:35.857+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of durable-task on behalf of admin
>2020-11-14 01:50:36.213+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading durable-task
>2020-11-14 01:50:36.213+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install durable-task
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/durable-task/1.35/durable-task.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/durable-task/1.35/durable-task.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/durable-task/1.35/durable-task.hpi to /usr/local/jenkins/plugins/durable-task.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/durable-task/1.35/durable-task.hpi (redirected to: https://get.jenkins.io/plugins/durable-task/1.35/durable-task.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:36.214+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of workflow-durable-task-step on behalf of admin
>2020-11-14 01:50:36.558+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading workflow-durable-task-step
>2020-11-14 01:50:36.558+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install workflow-durable-task-step
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-durable-task-step/2.36/workflow-durable-task-step.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-durable-task-step/2.36/workflow-durable-task-step.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/workflow-durable-task-step/2.36/workflow-durable-task-step.hpi to /usr/local/jenkins/plugins/workflow-durable-task-step.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/workflow-durable-task-step/2.36/workflow-durable-task-step.hpi (redirected to: https://get.jenkins.io/plugins/workflow-durable-task-step/2.36/workflow-durable-task-step.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:36.559+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of plugin-util-api on behalf of admin
>2020-11-14 01:50:36.904+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading plugin-util-api
>2020-11-14 01:50:36.904+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install plugin-util-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/plugin-util-api/1.4.0/plugin-util-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/plugin-util-api/1.4.0/plugin-util-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/plugin-util-api/1.4.0/plugin-util-api.hpi to /usr/local/jenkins/plugins/plugin-util-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/plugin-util-api/1.4.0/plugin-util-api.hpi (redirected to: https://get.jenkins.io/plugins/plugin-util-api/1.4.0/plugin-util-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:36.904+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of font-awesome-api on behalf of admin
>2020-11-14 01:50:37.248+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading font-awesome-api
>2020-11-14 01:50:37.248+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install font-awesome-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/font-awesome-api/5.15.1-1/font-awesome-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/font-awesome-api/5.15.1-1/font-awesome-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/font-awesome-api/5.15.1-1/font-awesome-api.hpi to /usr/local/jenkins/plugins/font-awesome-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/font-awesome-api/5.15.1-1/font-awesome-api.hpi (redirected to: https://get.jenkins.io/plugins/font-awesome-api/5.15.1-1/font-awesome-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:37.249+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of popper-api on behalf of admin
>2020-11-14 01:50:37.600+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading popper-api
>2020-11-14 01:50:37.600+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install popper-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/popper-api/1.16.0-7/popper-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/popper-api/1.16.0-7/popper-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/popper-api/1.16.0-7/popper-api.hpi to /usr/local/jenkins/plugins/popper-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/popper-api/1.16.0-7/popper-api.hpi (redirected to: https://get.jenkins.io/plugins/popper-api/1.16.0-7/popper-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:37.601+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of jquery3-api on behalf of admin
>2020-11-14 01:50:37.966+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading jquery3-api
>2020-11-14 01:50:37.967+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install jquery3-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/jquery3-api/3.5.1-2/jquery3-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/jquery3-api/3.5.1-2/jquery3-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/jquery3-api/3.5.1-2/jquery3-api.hpi to /usr/local/jenkins/plugins/jquery3-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/jquery3-api/3.5.1-2/jquery3-api.hpi (redirected to: https://get.jenkins.io/plugins/jquery3-api/3.5.1-2/jquery3-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:37.967+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of bootstrap4-api on behalf of admin
>2020-11-14 01:50:38.296+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading bootstrap4-api
>2020-11-14 01:50:38.297+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install bootstrap4-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/bootstrap4-api/4.5.3-1/bootstrap4-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/bootstrap4-api/4.5.3-1/bootstrap4-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/bootstrap4-api/4.5.3-1/bootstrap4-api.hpi to /usr/local/jenkins/plugins/bootstrap4-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/bootstrap4-api/4.5.3-1/bootstrap4-api.hpi (redirected to: https://get.jenkins.io/plugins/bootstrap4-api/4.5.3-1/bootstrap4-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:38.297+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of snakeyaml-api on behalf of admin
>2020-11-14 01:50:38.655+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading snakeyaml-api
>2020-11-14 01:50:38.656+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install snakeyaml-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/snakeyaml-api/1.27.0/snakeyaml-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/snakeyaml-api/1.27.0/snakeyaml-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/snakeyaml-api/1.27.0/snakeyaml-api.hpi to /usr/local/jenkins/plugins/snakeyaml-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/snakeyaml-api/1.27.0/snakeyaml-api.hpi (redirected to: https://get.jenkins.io/plugins/snakeyaml-api/1.27.0/snakeyaml-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:38.656+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of jackson2-api on behalf of admin
>2020-11-14 01:50:39.020+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading jackson2-api
>2020-11-14 01:50:39.021+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install jackson2-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/jackson2-api/2.11.3/jackson2-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/jackson2-api/2.11.3/jackson2-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/jackson2-api/2.11.3/jackson2-api.hpi to /usr/local/jenkins/plugins/jackson2-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/jackson2-api/2.11.3/jackson2-api.hpi (redirected to: https://get.jenkins.io/plugins/jackson2-api/2.11.3/jackson2-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:39.021+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of echarts-api on behalf of admin
>2020-11-14 01:50:39.363+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading echarts-api
>2020-11-14 01:50:39.364+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install echarts-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/echarts-api/4.9.0-2/echarts-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/echarts-api/4.9.0-2/echarts-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/echarts-api/4.9.0-2/echarts-api.hpi to /usr/local/jenkins/plugins/echarts-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/echarts-api/4.9.0-2/echarts-api.hpi (redirected to: https://get.jenkins.io/plugins/echarts-api/4.9.0-2/echarts-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:39.364+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of display-url-api on behalf of admin
>2020-11-14 01:50:39.711+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading display-url-api
>2020-11-14 01:50:39.712+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install display-url-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/display-url-api/2.3.3/display-url-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/display-url-api/2.3.3/display-url-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/display-url-api/2.3.3/display-url-api.hpi to /usr/local/jenkins/plugins/display-url-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/display-url-api/2.3.3/display-url-api.hpi (redirected to: https://get.jenkins.io/plugins/display-url-api/2.3.3/display-url-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:39.712+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of command-launcher on behalf of admin
>2020-11-14 01:50:40.065+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading command-launcher
>2020-11-14 01:50:40.065+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install command-launcher
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/command-launcher/1.5/command-launcher.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/command-launcher/1.5/command-launcher.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/command-launcher/1.5/command-launcher.hpi to /usr/local/jenkins/plugins/command-launcher.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/command-launcher/1.5/command-launcher.hpi (redirected to: https://get.jenkins.io/plugins/command-launcher/1.5/command-launcher.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:40.065+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of bouncycastle-api on behalf of admin
>2020-11-14 01:50:40.408+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading bouncycastle-api
>2020-11-14 01:50:40.409+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install bouncycastle-api
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/bouncycastle-api/2.18/bouncycastle-api.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/bouncycastle-api/2.18/bouncycastle-api.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/bouncycastle-api/2.18/bouncycastle-api.hpi to /usr/local/jenkins/plugins/bouncycastle-api.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/bouncycastle-api/2.18/bouncycastle-api.hpi (redirected to: https://get.jenkins.io/plugins/bouncycastle-api/2.18/bouncycastle-api.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:40.409+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of ace-editor on behalf of admin
>2020-11-14 01:50:40.754+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading ace-editor
>2020-11-14 01:50:40.754+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install ace-editor
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/ace-editor/1.1/ace-editor.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/ace-editor/1.1/ace-editor.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/ace-editor/1.1/ace-editor.hpi to /usr/local/jenkins/plugins/ace-editor.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/ace-editor/1.1/ace-editor.hpi (redirected to: https://get.jenkins.io/plugins/ace-editor/1.1/ace-editor.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:40.754+0000 [id=267]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of workflow-scm-step on behalf of admin
>2020-11-14 01:50:41.103+0000 [id=267]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading workflow-scm-step
>2020-11-14 01:50:41.103+0000 [id=267]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install workflow-scm-step
>java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-scm-step/2.11/workflow-scm-step.hpi
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1900)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3061)
>	at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
>	at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
>	at java.net.URLConnection.getContentLength(URLConnection.java:485)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:412)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1264)
>Caused: java.io.IOException: Server returned HTTP response code: 503 for URL: https://get.jenkins.io/plugins/workflow-scm-step/2.11/workflow-scm-step.hpi
>	at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source)
>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1950)
>	at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1945)
>	at java.security.AccessController.doPrivileged(Native Method)
>	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1944)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1514)
>	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
>	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1280)
>Caused: java.io.IOException: Failed to load https://updates.jenkins.io/download/plugins/workflow-scm-step/2.11/workflow-scm-step.hpi to /usr/local/jenkins/plugins/workflow-scm-step.jpi.tmp
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1287)
>Caused: java.io.IOException: Failed to download from https://updates.jenkins.io/download/plugins/workflow-scm-step/2.11/workflow-scm-step.hpi (redirected to: https://get.jenkins.io/plugins/workflow-scm-step/2.11/workflow-scm-step.hpi)
>	at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1321)
>	at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1869)
>	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2147)
>	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1843)
>	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:118)
>	at java.lang.Thread.run(Thread.java:748)
>2020-11-14 01:50:41.103+0000 [id=267]	INFO	h.m.UpdateCenter$CompleteBatchJob#run: Completing installing of plugin batch?
>2020-11-14 01:50:41.153+0000 [id=333]	INFO	jenkins.InitReactorRunner$1#onAttained: Started initialization
>2020-11-14 01:50:41.154+0000 [id=337]	INFO	jenkins.InitReactorRunner$1#onAttained: Listed all plugins
>2020-11-14 01:50:41.155+0000 [id=342]	INFO	jenkins.InitReactorRunner$1#onAttained: Prepared all plugin

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Attachments on bug 251122: 219664