Bug 12730
| Summary: | poll() causes indeterministic program hangs on 3.2 but not 3.1 | ||
|---|---|---|---|
| Product: | Base System | Reporter: | pfeifer <pfeifer> |
| Component: | kern | Assignee: | freebsd-bugs (Nobody) <bugs> |
| Status: | Closed FIXED | ||
| Severity: | Affects Only Me | ||
| Priority: | Normal | ||
| Version: | 3.2-RELEASE | ||
| Hardware: | Any | ||
| OS: | Any | ||
State Changed From-To: open->feedback Does this problem still occur on more recent releases? State Changed From-To: feedback->closed Submitter can no longer reproduce this and says that the PR can be closed. |
Since we switched some hosts from 3.1 to 3.2, Pine regularily (though not deterministically) hangs infinitely when sending e-mail. A backtrace in the debugger (gcore followed by gdb) reveals the following: (gdb) bt #0 0x282c80f8 in poll () from /usr/lib/libc.so.3 #1 0x282e5279 in res_send () from /usr/lib/libc.so.3 #2 0x282e1fbf in res_query () from /usr/lib/libc.so.3 #3 0x282dba98 in _gethostbydnsaddr () from /usr/lib/libc.so.3 #4 0x282da5b2 in gethostbyaddr () from /usr/lib/libc.so.3 #5 0x81817c2 in tcp_localhost (stream=0x82ca000) at tcp_unix.c:659 #6 0x817c044 in net_localhost (stream=0x82ba530) at mail.c:4645 #7 0x818ac67 in smtp_open_full (dv=0x0, hostlist=0x829fb10, service=0x822d247 "smtp", port=25, options=65) at smtp.c:166 #8 0x8128c36 in call_mailer () #9 0x8125463 in pine_send () #10 0x811f054 in compose_mail () #11 0x811e025 in compose_screen () #12 0x80bdcd5 in process_cmd () #13 0x80d0707 in index_lister () #14 0x80cf71a in mail_index_screen () #15 0x810c84c in main () #16 0x804a539 in _start () This is not a Pine problem, the very same Pine 4.10 binary has been working just fine on 3.1 for a couple of months. Home directories and /var/mail are NFS mounted from a Solaris 2.6 host. Originally we used Pine as distributed by its authors, but also applying the patches from the FreeBSD ports collection did not change anything. Some additional information from a message of mine to freebsd-stable@freebsd.org. As you see, something similiar happened with FreeBSD 3.1 but we managed to fix it, but FreeBSD 3.2 breaks again. Subject: Re: NFSv3 seriously broken in 3.1 On Mon, 28 Jun 1999, David O'Brien wrote: How-To-Repeat: NFS mount /var/mail and home directory from a Solaris 2.6 server. Send lots of e-mail from a FreeBSD 3.2 client until Pine hangs.