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Bug#368315: apache: [notice] child pid xxxxx exit signal Segmentation fault (11)

tech wrote:


my /var/log/apache/error.log is filled with error messages like :
[notice] child pid 15353 exit signal Segmentation fault (11)


Please run "apache -X" under gdb and see if you can get a backtrace of
the segfault, so we know who's at fault here.

Also, a list of modules you have loaded (and their package versions, or
information if they've been compiled/installed manually) would be useful.

... Adam
Hello, as it is a server in production and hosting 50 virtualhosts, it's a bit problematic to let it run under gdb until the segfault occurs, as it seems take some time after a restart before it happens... 

Here are more infos I can provide :
- when apache starts to segfault, it can happen many times a minute :

[Wed May 24 10:28:01 2006] [notice] child pid 28729 exit signal Segmentation fault (11)
[Wed May 24 10:28:03 2006] [notice] child pid 28726 exit signal Segmentation fault (11)
[Wed May 24 10:28:07 2006] [notice] child pid 28719 exit signal Segmentation fault (11)
[Wed May 24 10:28:09 2006] [notice] child pid 28716 exit signal Segmentation fault (11)
[Wed May 24 10:28:10 2006] [notice] child pid 28723 exit signal Segmentation fault (11)
[Wed May 24 10:28:12 2006] [notice] child pid 28721 exit signal Segmentation fault (11)
[Wed May 24 10:28:14 2006] [notice] child pid 28715 exit signal Segmentation fault (11)
[Wed May 24 10:28:18 2006] [notice] child pid 28725 exit signal Segmentation fault (11)
[Wed May 24 10:28:20 2006] [notice] child pid 28728 exit signal Segmentation fault (11)
[Wed May 24 10:28:22 2006] [notice] child pid 28727 exit signal Segmentation fault (11)
[Wed May 24 10:28:24 2006] [notice] child pid 28724 exit signal Segmentation fault (11)
[Wed May 24 10:28:26 2006] [notice] child pid 28722 exit signal Segmentation fault (11)
[Wed May 24 10:28:28 2006] [notice] child pid 28718 exit signal Segmentation fault (11)
[Wed May 24 10:28:30 2006] [notice] child pid 28710 exit signal Segmentation fault (11)
[Wed May 24 10:28:32 2006] [notice] child pid 28709 exit signal Segmentation fault (11)
[Wed May 24 10:28:34 2006] [notice] child pid 28707 exit signal Segmentation fault (11)
[Wed May 24 10:28:36 2006] [notice] child pid 28706 exit signal Segmentation fault (11)
[Wed May 24 10:28:38 2006] [notice] child pid 28705 exit signal Segmentation fault (11)
[Wed May 24 10:28:40 2006] [notice] child pid 28703 exit signal Segmentation fault (11)
[Wed May 24 10:28:42 2006] [notice] child pid 28702 exit signal Segmentation fault (11)
[Wed May 24 10:28:44 2006] [notice] child pid 28701 exit signal Segmentation fault (11)
[Wed May 24 10:28:46 2006] [notice] child pid 28700 exit signal Segmentation fault (11)
[Wed May 24 10:28:48 2006] [notice] child pid 28699 exit signal Segmentation fault (11)
[Wed May 24 10:28:50 2006] [notice] child pid 28698 exit signal Segmentation fault (11)
[Wed May 24 10:28:52 2006] [notice] child pid 28697 exit signal Segmentation fault (11)
[Wed May 24 10:28:54 2006] [notice] child pid 28696 exit signal Segmentation fault (11)
[Wed May 24 10:28:56 2006] [notice] child pid 28695 exit signal Segmentation fault (11)
[Wed May 24 10:28:58 2006] [notice] child pid 28694 exit signal Segmentation fault (11)
[Wed May 24 10:29:00 2006] [notice] child pid 28693 exit signal Segmentation fault (11)
[Wed May 24 10:29:04 2006] [notice] child pid 28691 exit signal Segmentation fault (11)
[Wed May 24 10:29:06 2006] [notice] child pid 28690 exit signal Segmentation fault (11)
[Wed May 24 10:29:08 2006] [notice] child pid 28689 exit signal Segmentation fault (11)
[Wed May 24 10:29:10 2006] [notice] child pid 28688 exit signal Segmentation fault (11)
[Wed May 24 10:29:12 2006] [notice] child pid 28687 exit signal Segmentation fault (11)
[Wed May 24 10:29:14 2006] [notice] child pid 28686 exit signal Segmentation fault (11)
[Wed May 24 10:29:17 2006] [notice] child pid 28685 exit signal Segmentation fault (11)
[Wed May 24 10:29:21 2006] [notice] child pid 28681 exit signal Segmentation fault (11)
[Wed May 24 10:29:23 2006] [notice] child pid 28680 exit signal Segmentation fault (11)
[Wed May 24 10:29:25 2006] [notice] child pid 28679 exit signal Segmentation fault (11)
[Wed May 24 10:29:27 2006] [notice] child pid 28626 exit signal Segmentation fault (11)
[Wed May 24 10:30:39 2006] [notice] child pid 28824 exit signal Segmentation fault (11)
[Wed May 24 10:30:42 2006] [notice] child pid 28817 exit signal Segmentation fault (11)
[Wed May 24 10:30:44 2006] [notice] child pid 28812 exit signal Segmentation fault (11)
[Wed May 24 10:31:20 2006] [notice] child pid 28819 exit signal Segmentation fault (11)
[Wed May 24 10:54:40 2006] [notice] child pid 29142 exit signal Segmentation fault (11)
[Wed May 24 10:54:42 2006] [notice] child pid 29141 exit signal Segmentation fault (11)
[Wed May 24 10:54:44 2006] [notice] child pid 29140 exit signal Segmentation fault (11)
[Wed May 24 10:54:46 2006] [notice] child pid 29139 exit signal Segmentation fault (11)
[Wed May 24 10:54:48 2006] [notice] child pid 29138 exit signal Segmentation fault (11)
[Wed May 24 10:54:50 2006] [notice] child pid 29137 exit signal Segmentation fault (11)
[Wed May 24 10:54:52 2006] [notice] child pid 29136 exit signal Segmentation fault (11)
[Wed May 24 10:54:54 2006] [notice] child pid 29135 exit signal Segmentation fault (11)
[Wed May 24 10:54:56 2006] [notice] child pid 29134 exit signal Segmentation fault (11)
[Wed May 24 10:54:58 2006] [notice] child pid 29133 exit signal Segmentation fault (11)
[Wed May 24 10:55:01 2006] [notice] child pid 29132 exit signal Segmentation fault (11)
[Wed May 24 10:55:09 2006] [notice] child pid 29131 exit signal Segmentation fault (11)
[Wed May 24 10:55:19 2006] [notice] child pid 29130 exit signal Segmentation fault (11)




in this case, I restarted apache at 10:31:20

- here is th result of : apt-show-versions -r .*apache.* :


libapache-mod-perl-doc/stable uptodate 1.29.0.2-5cvs20040129
libapache-mod-ssl-doc/testing uptodate 2.8.25-1
apache/testing uptodate 1.3.34-2
apache2-common/testing uptodate 2.0.55-4
apache2-utils/testing uptodate 2.0.55-4
libapache-mod-cgi-debug/testing uptodate 0.7-10
apache-common/testing uptodate 1.3.34-2
libapache-request-perl/testing uptodate 1.33-1
webmin-apache 1.220-2 newer than version in archive
libapache2-mod-php4/testing uptodate 4:4.4.2-1+b1
libapache-mod-php4/testing uptodate 4:4.4.2-1+b1
apache2-mpm-prefork/testing uptodate 2.0.55-4
libapache-mod-gzip/testing uptodate 1.3.26.1a-9
libapache-mod-ssl/testing uptodate 2.8.25-1
libapache-mod-jk/testing uptodate 1:1.2.14.1-2
libapache-modxslt/testing uptodate 2004112100-3.1
libapache-mod-perl/testing uptodate 1.29.0.4-2




and here is my /etc/apache/modules.conf


# Autogenerated file - do not edit!
# This file is maintained by the apache package.
# To update it, run the command:
#    /usr/sbin/apache-modconf apache
LoadModule vhost_alias_module /usr/lib/apache/1.3/mod_vhost_alias.so
LoadModule env_module /usr/lib/apache/1.3/mod_env.so
LoadModule config_log_module /usr/lib/apache/1.3/mod_log_config.so
LoadModule agent_log_module /usr/lib/apache/1.3/mod_log_agent.so
LoadModule referer_log_module /usr/lib/apache/1.3/mod_log_referer.so
#LoadModule log_forensic_module /usr/lib/apache/1.3/mod_log_forensic.so
LoadModule mime_magic_module /usr/lib/apache/1.3/mod_mime_magic.so
LoadModule mime_module /usr/lib/apache/1.3/mod_mime.so
LoadModule negotiation_module /usr/lib/apache/1.3/mod_negotiation.so
LoadModule status_module /usr/lib/apache/1.3/mod_status.so
LoadModule info_module /usr/lib/apache/1.3/mod_info.so
LoadModule includes_module /usr/lib/apache/1.3/mod_include.so
LoadModule autoindex_module /usr/lib/apache/1.3/mod_autoindex.so
LoadModule dir_module /usr/lib/apache/1.3/mod_dir.so
LoadModule cgi_module /usr/lib/apache/1.3/mod_cgi.so
LoadModule asis_module /usr/lib/apache/1.3/mod_asis.so
LoadModule imap_module /usr/lib/apache/1.3/mod_imap.so
LoadModule speling_module /usr/lib/apache/1.3/mod_speling.so
LoadModule userdir_module /usr/lib/apache/1.3/mod_userdir.so
LoadModule alias_module /usr/lib/apache/1.3/mod_alias.so
LoadModule rewrite_module /usr/lib/apache/1.3/mod_rewrite.so
LoadModule access_module /usr/lib/apache/1.3/mod_access.so
LoadModule auth_module /usr/lib/apache/1.3/mod_auth.so
LoadModule expires_module /usr/lib/apache/1.3/mod_expires.so
LoadModule headers_module /usr/lib/apache/1.3/mod_headers.so
#LoadModule usertrack_module /usr/lib/apache/1.3/mod_usertrack.so
LoadModule setenvif_module /usr/lib/apache/1.3/mod_setenvif.so
LoadModule perl_module /usr/lib/apache/1.3/mod_perl.so
#LoadModule ssl_module /usr/lib/apache/1.3/mod_ssl.so
LoadModule php4_module /usr/lib/apache/1.3/libphp4.so
LoadModule gzip_module /usr/lib/apache/1.3/mod_gzip.so
#LoadModule whatkilledus_module /usr/lib/apache/1.3/mod_whatkilledus.so




I also get very often this kind of messages :


[Wed May 24 12:26:45 2006] [info] server seems busy, (you may need to increase StartServers, or Min/MaxSpareServers), spawning 8 children, there are 0 idle, and 20 total children
[Wed May 24 12:26:46 2006] [info] server seems busy, (you may need to increase StartServers, or Min/MaxSpareServers), spawning 16 children, there are 0 idle, and 28 total children
[Wed May 24 12:26:47 2006] [info] server seems busy, (you may need to increase StartServers, or Min/MaxSpareServers), spawning 32 children, there are 0 idle, and 44 total children




and also this :

[info] [client 80.224.222.5] (32)Broken pipe: client stopped connection before send mmap completed




and then when I restart apache, whether with "apachectl restart" or with "/etc/init.d/apache restart"
I always get this kind of messages :

[Wed May 24 12:53:37 2006] [warn] child process 1780 did not exit, sending another SIGHUP
[Wed May 24 12:53:37 2006] [warn] child process 1781 did not exit, sending another SIGHUP
[Wed May 24 12:53:37 2006] [warn] child process 1782 did not exit, sending another SIGHUP
[Wed May 24 12:53:37 2006] [warn] child process 1783 did not exit, sending another SIGHUP


I hope all of this will help to find where the problem come from ;)

Stéphane CHIRON




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