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From "Nick Wilson" <n...@di.fm>
Subject [users@httpd] one more time... help with Segmentation fault
Date Wed, 26 Jul 2006 14:27:10 GMT
I don't know if no one saw it, or no one can help, but I'll try one more
time, this is honestly my last hope and im not sure what else to do

 

________________________________

Im having trouble debugging a segmentation fault, the server is only
running a phpAdsNew ads server. The system:

Dual opteron box running gentoo 2.6 kernel

Apache 2.0.58

PHP 5.1.4

 

When we hit our peak hours is when the seg faults start occurring:

 

[Tue Jul 25 13:09:32 2006] [notice] child pid 20868 exit signal
Segmentation fault (11)

[Tue Jul 25 13:09:32 2006] [notice] child pid 20877 exit signal
Segmentation fault (11)

[Tue Jul 25 13:09:32 2006] [notice] child pid 20895 exit signal
Segmentation fault (11)

[Tue Jul 25 13:09:34 2006] [notice] child pid 20340 exit signal
Segmentation fault (11)

[Tue Jul 25 13:09:34 2006] [notice] child pid 20698 exit signal
Segmentation fault (11)

[Tue Jul 25 13:09:34 2006] [notice] child pid 20738 exit signal
Segmentation fault (11)

[Tue Jul 25 13:09:34 2006] [notice] child pid 20826 exit signal
Segmentation fault (11)

[Tue Jul 25 13:09:34 2006] [notice] child pid 20858 exit signal
Segmentation fault (11)

[Tue Jul 25 13:09:34 2006] [notice] child pid 20866 exit signal
Segmentation fault (11)

[Tue Jul 25 13:09:34 2006] [notice] child pid 20884 exit signal
Segmentation fault (11)

[Tue Jul 25 13:09:34 2006] [notice] child pid 20886 exit signal
Segmentation fault (11)

[Tue Jul 25 13:09:34 2006] [notice] child pid 20893 exit signal
Segmentation fault (11)

[Tue Jul 25 13:09:34 2006] [notice] child pid 20903 exit signal
Segmentation fault (11)

 

This will happen every 5-10 minutes in blocks like that.

 

At first I thought it was a ram issue, but when I moved it to another
web server running apache 2.0.58/php5.0.4 the same thing happens. I've
attempted to setup a core dump directory using the CoreDumpDirectory
directive, the directory is owned by the apache user and "ulimit -c
unlimited" was run before starting apache, however nothing is ever
outputted. I did read that this has something to do with apache starting
as root and then switching to the correct user, but with kernel 2.4+ it
should still output, maybe im wrong. Next I tried to setup
mod_whatkilledus (http://people.apache.org/~trawick/mod_whatkilledus.c),
I compiled apache with -enable-exception-hook, and I have the
EnableExceptionHook directive on and the module is loaded, however as
you can see from my log output mod_whatkilledus is not doing anything.
Is there something im missing to make both of these work? Any help would
be appreciated as this is driving me nuts =]

 

-Nick

 

Nick Wilson

Web Developer

Digitally Imported, Inc.

http://www.di.fm

http://www.sky.fm

<http://www.di.fm> 

 


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