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Bug #61689 php-fpm children crashes on exit
Submitted: 2012-04-10 14:54 UTC Modified: 2013-02-18 00:35 UTC
Votes:2
Avg. Score:3.5 ± 0.5
Reproduced:2 of 2 (100.0%)
Same Version:1 (50.0%)
Same OS:0 (0.0%)
From: eugene at zhegan dot in Assigned: fat (profile)
Status: No Feedback Package: FPM related
PHP Version: 5.3.10 OS: FreeBSD 9.0-RELEASE
Private report: No CVE-ID: None
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From: eugene at zhegan dot in
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 [2012-04-10 14:54 UTC] eugene at zhegan dot in 
Description:
------------
I use an nginx + php-fpm installation. Php-fpm is installed form ports.
The problem is, that php-fpm children sometimes (not always) got signal 11 when the master process attempts to rotate em:

[10-Apr-2012 20:46:30.072189] DEBUG: pid 14165, fpm_got_signal(), line 72: received SIGCHLD
[10-Apr-2012 20:46:30.072278] WARNING: pid 14165, fpm_children_bury(), line 252: [pool www] child 14590 exited on signal 11 (SIGSEGV) after 121.434207 seconds from start

Seems like this doesn't affect the production process, but anyway this bothers me and I think you will agree that bugs should be attempted to be fixed.

I would be really glad to present you a backtrace, but unfortunately I don't see any corefiles anywhere. Core dumps are enabled, even for suid/gid processes:

# sysctl -a | grep core
kern.corefile: %N.core
kern.nodump_coredump: 0
kern.coredump: 1
kern.sugid_coredump: 1
debug.elf64_legacy_coredump: 0
debug.ncores: 5
debug.elf32_legacy_coredump: 0

But still no cores.

Test script:
---------------
I don't think this is relatred to some particular script.

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 [2012-05-23 13:28 UTC] fat@php.net
-Assigned To: +Assigned To: fat
 [2012-05-23 18:20 UTC] fat@php.net
-Status: Assigned +Status: Feedback
 [2012-05-23 18:20 UTC] fat@php.net 
Thank you for this bug report. To properly diagnose the problem, we
need a backtrace to see what is happening behind the scenes. To
find out how to generate a backtrace, please read
http://bugs.php.net/bugs-generating-backtrace.php for *NIX and
http://bugs.php.net/bugs-generating-backtrace-win32.php for Win32

Once you have generated a backtrace, please submit it to this bug
report and change the status back to "Open". Thank you for helping
us make PHP better.

I can't do anything w/o a coredump.

You should check your ulimits configuration, the directory where FPM children 
process are in (chdir FPM parameter), the rights of this directory and ensure 
rlimit_core FPM parameter is not set (to use default ulimit values).
 [2013-02-18 00:35 UTC] php-bugs at lists dot php dot net 
No feedback was provided. The bug is being suspended because
we assume that you are no longer experiencing the problem.
If this is not the case and you are able to provide the
information that was requested earlier, please do so and
change the status of the bug back to "Open". Thank you.
 
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