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From Per olof Ljungmark <>
Subject [users@httpd] Annoying problem with apache22 / php5 - how to investigate?
Date Sun, 05 Jul 2009 00:01:23 GMT

We run FreeBSD 7 and apache 2.2 (currently 2.2.11) with php5 serving 
pages from a webmail app (Horde).

Randomly (as it seems at least), there is a 500 (Internal server error) 
and a blank page is presented to the user like

[04/Jul/2009:15:19:37 +0200] "GET 
/services/portal/sidebar.php?httpclient=1 HTTP/1.1" 500 -

There are no other messages in the logs, not even with LogLevel debug. 
The problem has survived several both OS and Apache/PHP/HORDE upgrades 
and I really need to track this down now.

Question: What tools would be the best to further analyze this? The 
standard logging does not seem to be sufficient in this case and I am 
totally inexperienced in how to dig further down.

Thanks a lot!


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