Apache2 sporadically not interpreting php code

Question

My httpdserver is sporadically not interpreting some of my php code. For example: today it can be function a() from page1.php that he doesn't find and tomorrow it can be function b() from page2.php that isn't interpeted. After restarting the httpd service, it works for a couple of hours and then the problems are coming back.

I didn't found any large errors in my httpd/error_log file, except from these (but I think this is because i restarted the httpd service):

[Wed Oct 26 08:52:01 2011] [notice] caught SIGTERM, shutting down
[Wed Oct 26 08:52:02 2011] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Wed Oct 26 08:52:02 2011] [notice] Digest: generating secret for digest authentication ...
[Wed Oct 26 08:52:02 2011] [notice] Digest: done
PHP Warning:  Module 'apc' already loaded in Unknown on line 0
[Wed Oct 26 08:52:02 2011] [notice] mod_python: Creating 4 session mutexes based on 256 max processes and 0 max threads.
[Wed Oct 26 08:52:02 2011] [notice] mod_python: using mutex_directory /tmp
[Wed Oct 26 08:52:02 2011] [notice] Apache/2.2.8 (Unix) DAV/2 PHP/5.2.6 mod_python/3.3.1 Python/2.5 mod_ssl/2.2.8 OpenSSL/0.9.8b mod_perl/2.0.3 Perl/v5.8.8 configured -- resuming normal operations

It is a dedicated server with Fedora 7. PHP version: 5.2.6 Apache version: 2.2.8 I am also using RewriteCond

Answer 1

Fedora 7? Was this server originally found by Indiana Jones from the catacombs of Egypt? :-)

That said, I suspect APC might cause your problem. Have you tried disabling it?