httpd-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Rodrigo Aliste P." <rali...@gmail.com>
Subject Re: [users@httpd] Apache intermittent crash - HELP!!!
Date Thu, 17 Dec 2009 02:17:25 GMT
I just noticed that your error log shows:

[Tue Dec 15 13:04:22 2009] [error] server reached MaxClients setting,
consider raising the MaxClients setting

so try adjusting your MaxClient setting and your prefork settings. (
http://httpd.apache.org/docs/2.0/mod/prefork.html)

I'm not an expert on tuning those settings, but I'm sure someone else here
could help you.


2009/12/16 Rodrigo Aliste P. <raliste@gmail.com>

> 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.in@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.uk@googlemail.com>wrote:
>>
>>> On Wed, Dec 16, 2009 at 4:20 PM, gary lim <garylim.in@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-unsubscribe@httpd.apache.org
>>>   "   from the digest: users-digest-unsubscribe@httpd.apache.org
>>> For additional commands, e-mail: users-help@httpd.apache.org
>>>
>>>
>>
>
>
> --
> Rodrigo Aliste P.
>
>


-- 
Rodrigo Aliste P.

Mime
View raw message