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Bug #68338 Slowly Cascading Segfaults
Submitted: 2014-11-03 00:13 UTC Modified: 2014-11-03 01:54 UTC
From: john at boxrec dot com Assigned:
Status: Not a bug Package: Apache related
PHP Version: 5.6.2 OS: Ubuntu 14.04
Private report: No CVE-ID: None
 [2014-11-03 00:13 UTC] john at boxrec dot com
Description:
------------
When I start the server under load and it segfaults every 5 mins and this rate increases until after a few hours it's several times a second.

[Mon Nov 03 00:29:46.131169 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 27525 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:29:47.133226 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 27619 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:29:48.134335 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 27499 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:29:48.134376 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 27501 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:29:48.134392 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 27650 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:29:48.134405 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 27652 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:29:50.137747 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 27712 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:29:51.140250 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 27741 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:29:51.140285 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 27742 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:29:52.141397 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 27800 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:29:52.141433 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 27813 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:29:52.141451 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 27844 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:29:53.142870 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 27801 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:29:54.144862 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 27917 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:29:55.147567 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 27946 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:29:55.147605 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 27947 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:29:56.148701 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 28004 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:29:56.148733 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 28056 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:29:58.152316 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 28118 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:29:59.153407 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 28148 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:30:00.154893 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 28023 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:30:00.154935 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 28147 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:30:01.156848 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 28005 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:30:01.156884 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 28210 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:30:02.159563 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 28248 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:30:02.159597 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 28249 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:30:03.160655 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 28423 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:30:04.162373 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 28358 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:30:04.162418 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 28378 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:30:05.164448 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 28481 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:30:05.422892 2014] [mpm_event:notice] [pid 11695:tid 139978632546112] AH00493: SIGUSR1 received.  Doing graceful restart
[Mon Nov 03 00:30:05.490666 2014] [mpm_event:notice] [pid 11695:tid 139978632546112] AH00489: Apache/2.4.10 (Unix) PHP/5.6.2 configured -- resuming normal operations
[Mon Nov 03 00:30:05.490686 2014] [core:notice] [pid 11695:tid 139978632546112] AH00094: Command line: '/usr/local/apache2/bin/httpd'
[Mon Nov 03 00:30:05.490707 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 28513 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:30:52.541270 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 28795 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:34:54.790968 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 28831 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:38:39.022670 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 29059 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:40:07.114836 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 29122 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:40:28.136785 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 29171 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:41:36.209412 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 29202 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:44:24.384207 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 29231 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:46:20.506009 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 29272 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:48:16.629620 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 29326 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:49:45.724228 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 29387 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:50:14.755809 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 29430 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:51:49.855736 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 29465 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:56:05.122066 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 28706 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:57:38.218295 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 29595 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 00:58:23.265863 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 28704 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2
[Mon Nov 03 01:02:35.525193 2014] [core:notice] [pid 11695:tid 139978632546112] AH00051: child pid 28731 exit signal Segmentation fault (11), possible coredump in /usr/local/apache2



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 [2014-11-03 00:29 UTC] requinix@php.net
-Status: Open +Status: Feedback
 [2014-11-03 00:29 UTC] requinix@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.

It'd help to know what the code is doing too. And what changed when the segfaults started happening.
 [2014-11-03 01:54 UTC] requinix@php.net
-Status: Feedback +Status: Not a bug
 [2014-11-03 01:54 UTC] requinix@php.net
Was a configuration issue.
 
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