apache2 crashed with SIGABRT in proc_mutex_fcntl_acquire() -> __libc_fcntl()

[Dylan Borg]

apport showed up

ProblemType: Crash
DistroRelease: Ubuntu 13.10
Package: apache2-bin 2.4.6-2ubuntu2
ProcVersionSignature: Ubuntu 3.11.0-5.10-generic 3.11.0
Uname: Linux 3.11.0-5-generic i686
ApportVersion: 2.12.1-0ubuntu3
Architecture: i386
CrashCounter: 1
Date: Wed Sep 4 22:50:40 2013
ExecutablePath: /usr/sbin/apache2
InstallationDate: Installed on 2011-11-11 (664 days ago)
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
MarkForUpload: True
ProcCmdline: /usr/sbin/apache2 -k start
ProcEnviron:
 PATH=(custom, no user)
 LANG=C
Signal: 6
SourcePackage: apache2
StacktraceTop:
 __libc_fcntl (fd=26, cmd=7) at ../sysdeps/unix/sysv/linux/i386/fcntl.c:53
 ?? () from /usr/lib/libapr-1.so.0
 apr_proc_mutex_lock () from /usr/lib/libapr-1.so.0
 ?? () from /usr/lib/apache2/modules/mod_mpm_prefork.so
 ?? () from /usr/lib/apache2/modules/mod_mpm_prefork.so
Title: apache2 crashed with SIGABRT in __libc_fcntl()
UpgradeStatus: Upgraded to saucy on 2013-08-04 (31 days ago)
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 __libc_fcntl (fd=26, cmd=cmd@entry=7) at ../sysdeps/unix/sysv/linux/i386/fcntl.c:53
 proc_mutex_fcntl_acquire (mutex=0xb5f1de88) at ../locks/unix/proc_mutex.c:579
 apr_proc_mutex_lock (mutex=0xb5f1de88) at ../locks/unix/proc_mutex.c:906
 accept_mutex_on () at prefork.c:232
 child_main (child_num_arg=child_num_arg@entry=7) at prefork.c:611

[Bryce Harrington (bryce)]

Closing as expired, since this bug was against Ubuntu 13.10, on a version of apache2 that is no longer under active support.

(I'm not sure from the stack trace alone what was going on. It seems to have failed during mutex acquisition, but there wasn't enough information captured to discern what was wrong beyond that.)