Gary: The same thing happened to one of my servers. After long research I got to the conclusion that the problem was caused by the XCache module. If you have it, try to disable it.
Rodrigo 2009/12/16 gary lim <garylim...@gmail.com> > Hi, > > 1. Unfortunately, our website depend heavily on PHP to operate, so it not > possible for us to disable it. We also highly suspect that the crash is > related to one of our php module because we are running a lot of Joomla > component. > > 2. unfortunately, we are unable to track which module is causing this > issue. Any idea how we can check which script is causing the problem because > this has been going on for weeks and we are still unable to determine the > source. > > 3. Kindly advise how we can perform the migration of our existing codebase > to FastCGI/SCGI without breaking the current website? > > > rgds > > > On Thu, Dec 17, 2009 at 12:28 AM, Tom Evans <tevans...@googlemail.com>wrote: > >> On Wed, Dec 16, 2009 at 4:20 PM, gary lim <garylim...@gmail.com> wrote: >> > >> > Dear all, >> > >> > 1. I'm using Linux 2.6.16.29 and running on i686 Intel(R) Pentium(R) 4 >> CPU 3.00GHz GNU/Linux >> > 2. The below info are my machine config and log output >> > 3. Kindly advise how to resolve intermittent apache crash even after >> performance tuning >> > >> > httpd.conf output >> > # prefork MPM [DEFAULT IF USE=-threads] >> > # StartServers: number of server processes to start >> > # MinSpareServers: minimum number of server processes which are kept >> spare >> > # MaxSpareServers: maximum number of server processes which are kept >> spare >> > # MaxClients: maximum number of server processes allowed to start >> > # MaxRequestsPerChild: maximum number of requests a server process >> serves >> > <IfModule prefork.c> >> > StartServers 2 >> > MinSpareServers 4 >> > MaxSpareServers 6 >> > MaxClients 100 >> > MaxRequestsPerChild 500 >> > </IfModule> >> > >> > # worker MPM [DEFAULT IF USE=threads] >> > # StartServers: initial number of server processes to start >> > # MaxClients: maximum number of simultaneous client connections >> > # MinSpareThreads: minimum number of worker threads which are kept spare >> > # MaxSpareThreads: maximum number of worker threads which are kept spare >> > # ThreadsPerChild: constant number of worker threads in each server >> process >> > # MaxRequestsPerChild: maximum number of requests a server process >> serves >> > <IfModule worker.c> >> > StartServers 2 >> > MaxClients 100 >> > MinSpareThreads 25 >> > MaxSpareThreads 75 >> > ThreadsPerChild 25 >> > MaxRequestsPerChild 500 >> > </IfModule> >> > >> > >> > >> > top output >> > top - 00:09:00 up 157 days, 23:12, 2 users, load average: 0.67, 0.85, >> 0.80 >> > Tasks: 47 total, 1 running, 46 sleeping, 0 stopped, 0 zombie >> > Cpu(s): 8.3% us, 1.4% sy, 0.0% ni, 88.0% id, 2.2% wa, 0.0% hi, >> 0.0% si >> > Mem: 917652k total, 858880k used, 58772k free, 142820k buffers >> > Swap: 1048568k total, 37844k used, 1010724k free, 434476k cached >> > >> > apache2 error log >> > *** glibc detected *** /usr/sbin/apache2: double free or corruption >> (fasttop): 0x08b4faf0 *** >> > [Tue Dec 15 13:04:22 2009] [error] server reached MaxClients setting, >> consider raising the MaxClients setting >> > *** glibc detected *** /usr/sbin/apache2: double free or corruption >> (fasttop): 0x086a1170 *** >> > *** glibc detected *** /usr/sbin/apache2: double free or corruption >> (fasttop): 0x08b48c08 *** >> > [Wed Dec 16 23:53:07 2009] [warn] child process 1325 still did not exit, >> sending a SIGTERM >> > [Wed Dec 16 23:53:07 2009] [warn] child process 19910 still did not >> exit, sending a SIGTERM >> > [Wed Dec 16 23:53:07 2009] [warn] child process 10569 still did not >> exit, sending a SIGTERM >> > [Wed Dec 16 23:53:07 2009] [warn] child process 16964 still did not >> exit, sending a SIGTERM >> > [Wed Dec 16 23:53:07 2009] [warn] child process 19718 still did not >> exit, sending a SIGTERM >> > [Wed Dec 16 23:53:09 2009] [warn] child process 1325 still did not exit, >> sending a SIGTERM >> > [Wed Dec 16 23:53:09 2009] [warn] child process 19910 still did not >> exit, sending a SIGTERM >> > [Wed Dec 16 23:53:09 2009] [warn] child process 10569 still did not >> exit, sending a SIGTERM >> > [Wed Dec 16 23:53:09 2009] [warn] child process 16964 still did not >> exit, sending a SIGTERM >> > [Wed Dec 16 23:53:09 2009] [warn] child process 19718 still did not >> exit, sending a SIGTERM >> > [Wed Dec 16 23:53:11 2009] [warn] child process 1325 still did not exit, >> sending a SIGTERM >> > [Wed Dec 16 23:53:11 2009] [warn] child process 19910 still did not >> exit, sending a SIGTERM >> > [Wed Dec 16 23:53:11 2009] [warn] child process 10569 still did not >> exit, sending a SIGTERM >> > [Wed Dec 16 23:53:11 2009] [warn] child process 16964 still did not >> exit, sending a SIGTERM >> > [Wed Dec 16 23:53:11 2009] [warn] child process 19718 still did not >> exit, sending a SIGTERM >> > [Wed Dec 16 23:53:13 2009] [error] child process 1325 still did not >> exit, sending a SIGKILL >> > [Wed Dec 16 23:53:13 2009] [error] child process 19910 still did not >> exit, sending a SIGKILL >> > [Wed Dec 16 23:53:13 2009] [error] child process 10569 still did not >> exit, sending a SIGKILL >> > [Wed Dec 16 23:53:13 2009] [error] child process 16964 still did not >> exit, sending a SIGKILL >> > >> > >> > Joomla / PHP / Apache >> > System Information >> > PHP built On: Linux trillian 2.6.16.29-ab1-xenU #1 SMP Sat Sep 23 >> 19:20:15 SGT 2006 i686 >> > Database Version: 5.0.24a-log >> > PHP Version: 5.1.6-pl4-gentoo >> > Web Server: Apache >> > WebServer to PHP interface: apache2handler >> > Joomla! Version: Joomla! 1.0.15 Stable [ Daytime ] 22 February 2008 >> 23:00 UTC >> > User Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.15) >> Gecko/2009101601 Firefox/3.0.15 (.NET CLR 3.5.30729) >> > >> > Mysql >> > mysql Ver 14.12 Distrib 5.0.24a, for pc-linux-gnu (i686) using readline >> 5.1 >> > >> >> Does it work if you disable PHP? Does it still exhibit problems if you >> run PHP out of process, eg using fastcgi or scgi (can PHP talk SCGI?). >> For my money, the double free()s are coming from PHP or a PHP module. >> >> Cheers >> >> Tom >> >> --------------------------------------------------------------------- >> The official User-To-User support forum of the Apache HTTP Server Project. >> See <URL:http://httpd.apache.org/userslist.html> for more info. >> To unsubscribe, e-mail: users-unsubscr...@httpd.apache.org >> " from the digest: users-digest-unsubscr...@httpd.apache.org >> For additional commands, e-mail: users-h...@httpd.apache.org >> >> > -- Rodrigo Aliste P.
