[notice] child pid XXXX exit signal Segmentation fault (11)

By , Sunday 11th October 2009 6:09 pm

If you’ve recently upgraded PHP or Apache you maybe coming up against the issue of your webserver returning blank pages, and throwing error messages into your logs with no idea why, here’s one possible way to fix it…

I’ve had this problem a couple of times recently after upgrading Apache or PHP on a virtual machine. The first time I noticed the error I simply reverted to a backup of my VM but the second time I realised I’d have to look into the issue.

The first time I noticed the issue some of my web pages were being served as blank files while the others worked absolutely fine. After some investigation I noted that apache was writing out to /var/log/http/error_log with the following message repeatidly:

[notice] child pid XXXX exit signal Segmentation fault (11)

There’s not allot to go by on-line, and most of the pages about it trail off to nothing. That said, I narrowed down the issue to PHP crashing when trying to unneeded dynamic libraries.

Looking at my php.ini (/etc/php.ini) I commented out all of the dynamic libraries loaded planning on commenting them back in as required. The two I had to take out where pdo.so and mysql.so.

Once these were removed all my web pages were being served fine, just as before the PHP/Apache update.

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