Doing an upgrade of Jenkins (but also a clean installation) lead to a jenkins that didn't start or start partially (started jetty but not the actually application). The /usr/local/jenkins directory didn't seem to be owned by jenkins:jenkins and I used chown myself.
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A commit references this bug: Author: swills Date: Sat Oct 18 18:06:40 UTC 2014 New revision: 371152 URL: https://svnweb.freebsd.org/changeset/ports/371152 Log: devel/jenkins-lts: Fix permissions on ${PREFIX}/jenkins While here, bring over other changes from devel/jenkins PR: 194274 Reported by: Holger Freyther <holger@freyther.de> Changes: head/devel/jenkins-lts/Makefile head/devel/jenkins-lts/pkg-plist
Should be fixed now, let me know you still have issues. Thanks!