Apache Segfault Error 6
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this Page… Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode 04-25-2011,02:49 PM #1 kangzj View Profile View Forum Posts Verified User Join Date Nov 2010 Posts 7 very wierd problem: httpd/php caused kernel segfualt. /var/log/messages are many segfault errors as follows, ----------------- Apr 26 13:42:32 host kernel: httpd[25056]: segfault at 00007fff4d5db928 rip 00002ba1807da57a rsp 00007fff4d5db910 error 6 Apr 26 13:42:33 host kernel: httpd[29267]: segfault at 00007fff4d5db878 rip 00002ba1807da57a rsp 00007fff4d5db860 error 6 Apr 26 13:42:34 host kernel: httpd[29642]: segfault at 00007fff4d5db3a8 rip 00002ba1807da57a rsp 00007fff4d5db390 error 6 Apr 26 13:42:35 host kernel: httpd[30302]: segfault at 00007fff4d5db248 rip 00002ba1807da57a rsp 00007fff4d5db230 error 6 Apr 26 13:42:37 host kernel: httpd[26788]: segfault at 00007fff4d5db5b8 rip 00002ba1807da57a rsp 00007fff4d5db5a0 error 6 Apr 26 13:42:38 host kernel: httpd[26789]: segfault at 00007fff4d5dbb38 rip 00002ba1807da57a rsp 00007fff4d5dbb20 error 6 Apr 26 13:42:44 host kernel: httpd[31417]: segfault at 00007fff4d5dbb38 rip 00002ba1807da57a rsp 00007fff4d5dbb20 error 6 Apr 26 13:42:46 host kernel: httpd[31430]: segfault at 00007fff4d5db5b8 rip 00002ba1807da57a rsp 00007fff4d5db5a0 error 6 Apr 26 13:42:46 host kernel: httpd[28526]: segfault at 00007fff4d5dbb38 rip 00002ba1807da57a rsp 00007fff4d5dbb20 error 6 Apr 26 13:42:46 host kernel: httpd[31429]: segfault at 00007fff4d5db718 rip 00002ba1807da57a rsp 00007fff4d5db700 error 6 Apr 26 13:42:46 host kernel: httpd[32406]: segfault at 00007fff4d5dcec0 rip 00002ba1807e2493 rsp 00007fff4d5dcec0 error 6 Apr 26 13:42:48 host kernel: httpd[31424]: segfault at
Post #1 of 6 (8154 views) Permalink Tons of Segfaults in Apache-Prefork 2.2.4 Hi all, we experience a lot of threads segfaulting with our Apaches. There are about 300 dying threads per day. The error in syslog is the following: Apr 16 23:51:41 foo-bar kernel: httpd[24629]: segfault at 00007fffae529f98 rip 00002b2ffd6408b7 rsp 00007fffae529ea0 error 6 I wish I could http://forum.directadmin.com/showthread.php?t=40179 give you some kind of trace or core file. But we don't get a core file since only threads die and not the root-process. I also tried to strace the Apache but this slowed the server down too much. And the error appears only on the live system with a http://www.gossamer-threads.com/lists/apache/users/350309 very high load. Any ideas welcome here. At the same time we get broken TCP packets with a wrong window size which looks like this: Apr 17 00:14:17 foo-bar kernel: TCP: Treason uncloaked! Peer 84.175.98.78:2637/80 shrinks window 1785243455:1785255071. Repaired. The information I found on the net are very contradictory, so I can't estimate the impact on the system. The box is used for dynamic webpages on PHP. Below are some system information. Sorry, this is not very much information but I'm still at the beginning of my Apache leraning curve. Thx and cheers, --- Markus Meyer Some system info: # uname -a Linux wkw-fra2 2.6.18-4-amd64 #1 SMP Fri May 4 00:37:33 UTC 2007 x86_64 GNU/Linux from httpd.conf ================ ServerLimit 1800 StartServers 250 MinSpareServers 64 MaxSpareServers 128 MaxClients 1200 Timeout 60 KeepAlive On KeepAliveTimeout 2 MaxKeepAliveRequests 128 MaxRequestsPerChild 10000 LoadModule authz_owner_module modules/mod_authz_owner.so LoadModule ext_filter_module modules/mod_ext_filter.so LoadModule env_module modules/mod_env.so
problem is that in the apache2 error log I can see a lot of segfaults. All sites though continue to work properly and https://www.void.gr/kargig/blog/2009/02/03/help-needed-on-apache2-segfaults/ nobody has ever complained about them. Some logs: [Tue Feb 03 18:30:36 2009] [notice] child pid 1353 exit signal Segmentation fault (11) [Tue Feb 03 18:30:37 2009] [notice] child pid http://www.centos.org/forums/viewtopic.php?t=27567 29343 exit signal Segmentation fault (11) [Tue Feb 03 18:30:37 2009] [notice] child pid 1350 exit signal Segmentation fault (11) [Tue Feb 03 18:30:38 2009] [notice] child pid 1349 segfault error exit signal Segmentation fault (11) [Tue Feb 03 18:30:38 2009] [notice] child pid 1352 exit signal Segmentation fault (11) [Tue Feb 03 18:30:39 2009] [notice] child pid 1354 exit signal Segmentation fault (11) [Tue Feb 03 18:30:41 2009] [notice] child pid 1380 exit signal Segmentation fault (11) [Tue Feb 03 18:30:42 2009] [notice] child pid 1378 exit signal Segmentation fault segfault error 6 (11) [Tue Feb 03 18:30:42 2009] [notice] child pid 1714 exit signal Segmentation fault (11) [Tue Feb 03 18:30:44 2009] [notice] child pid 1715 exit signal Segmentation fault (11) [Tue Feb 03 18:30:44 2009] [notice] child pid 1718 exit signal Segmentation fault (11) [Tue Feb 03 18:30:45 2009] [notice] child pid 1720 exit signal Segmentation fault (11) [Tue Feb 03 18:30:45 2009] [notice] child pid 1721 exit signal Segmentation fault (11) [Tue Feb 03 18:30:46 2009] [notice] child pid 1723 exit signal Segmentation fault (11) [Tue Feb 03 18:30:47 2009] [notice] child pid 1724 exit signal Segmentation fault (11) [Tue Feb 03 18:30:47 2009] [notice] child pid 1725 exit signal Segmentation fault (11) [Tue Feb 03 18:30:49 2009] [notice] child pid 1726 exit signal Segmentation fault (11) [Tue Feb 03 18:30:49 2009] [notice] child pid 1728 exit signal Segmentation fault (11) [Tue Feb 03 18:30:50 2009] [notice] child pid 1729 exit signal Segmentation fault (11) [Tue Feb 03 18:30:50 2009] [notice] child pid 1730 exit signal Segmentation fault (11) [Tue Feb 03 18:30:51 2009] [notice] child
server Installing, Configuring, Troubleshooting server daemons such as Web and Mail Post Reply Print view Search Advanced search 3 posts • Page 1 of 1 adankert Posts: 2 Joined: 2008/01/22 17:55:01 Contact: Contact adankert Website httpd segfaults crashing server Quote Postby adankert » 2008/01/22 18:04:56 I am running latest centos with all the latest available fixes. My site runs stable....if I do not run Joomla system.When I run Joomla (PHP and MySQL based web publishing) the server crashes withing 48 hours or so. In /var/log/messages I see errors like this:kernel: httpd[20025]: segfault at 00007fff97f02ff8 rip 00002aaaac7e1ab0 rsp 00007fff97f03018 error 6kernel: httpd[19959]: segfault at 00007fff97f02ff8 rip 00002aaaac7e55fc rsp 00007fff97f03000 error 6kernel: httpd[20111]: segfault at 00007fff97f02ff8 rip 00002aaaac7e1ab0 rsp 00007fff97f03018 error 6kernel: httpd[20031]: segfault at 00007fff97f02fd0 rip 00002aaaac7b8275 rsp 00007fff97f02fc0 error 6kernel: httpd[20519]: segfault at 00007fff97f02ff8 rip 00002aaaac7e1ab0 rsp 00007fff97f03018 error 6This starts at 24-48 hours after server has been restarted.After 3-5 hours of this the server becomes unresponsive!I can?t find any information regarding this error with Joomla/apache/mysql/php anywhere on the net.Any ide what causes this? Again: If I do not run anything PHP based the server runs fine for months.Regards,adankerta Top yyagol Posts: 1015 Joined: 2006/06/10 18:27:44 Location: 32 4′N 34 47′E Contact: Contact yyagol Website httpd segfaults crashing server Quote Postby yyagol » 2008/01/22 22:51:10 upgrade you're server it works too hard !check you're load when this errors happen most likely its under heavy duty . Top adankert Posts: 2 Joined: 2008/01/22 17:55:01 Contact: Contact adankert Website Re: httpd segfaults crashing server Quote Postby adankert » 2008/01/23 12:34:43 THanks for your replay, but I don?t think this can be the problem. CPU has idl