Re: segmentation Faults

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I'm certainly no expert, but have you run a memory test on this server? Maybe it's a red herring, but the "Failed to read a valid object file image from memory" message and the fact that it's started crashing suddenly after working for 3 years would make me suspicious. If you don't have time to run memtest through it's paces, maybe you can try reseating/swapping around the RAM (or swapping compatible RAM from another less mission-critical server) and see if the nature of the problem changes or goes away.

Paul

On 9/12/2011 7:02 AM, dhottinger@xxxxxxxxxxxxxxxxxxxxxx wrote:
I recently started get seg faults on a production server that has been online for 3 years now. At first I was convinced it was a faulty php script in one of the cms sites, but now it seems to happen fairly often. I actually used a little bash script that restarts apache when it sees the segfault in the logfiles. I have a core dump from the latest fault:
GNU gdb Red Hat Linux (6.3.0.0-1.134.fc5rh)
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "i386-redhat-linux-gnu"...(no debugging symbols found)
Using host libthread_db library "/lib/libthread_db.so.1".

Failed to read a valid object file image from memory.
Core was generated by `/usr/sbin/httpd'.
Program terminated with signal 11, Segmentation fault.
<SNIP>
Ive been trying to figure out what is causing the sudden onset of the segfaults, and havent pinpointed it yet. If anyone can look at the coredump file and interpret it for me that would be great. The websites that I think are causing the issue are using cms made simple 1.6.8.

If there is a config change I can make to my httpd.conf that would alleviate this I would gladly do so.

Incidently when the segfaults occur, users get an error that the page can not be found, or server is refusing connection to that page.

Thanks for helping,
ddh





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