[xdebug-general] Internal Server Error while debuging

From: Andreas Paeffgen <oegeeks[@]googlemail.com>
Date: Wed, 8 Jun 2011 11:43:34 +0200

Hi all,

using xdebug.so 2.1.1 on centos 5.6 and php 5.3.6 (xdebug Compiled from the
sources) in
various client-debug-environments i always get socket errors, internal
server errors and strange behaviors.

All debugging is remote on a Mac with only one breakpoint.

1. Eclipse: Debug-Session starts correctly and shows some Variables.
Meanwhile the website tries to load. After 30 sec, or so an internal server
error occurs. No further debugging possible. Restart of the debug-session
necessary. Then the same happens again.
2. Netbeans: Configuring the Watch and Balloning in the options dialog
gives a warning about unstable behavior, so i suspected a somewhat weird
behavior. Debug-Session starts, but
watch variables only show null values. Working with the debugger leads
to internal server errors in the debug-session or to a socket error.
Restart of netbeans is necessary after a socket error occurs to
be able to start debugging again.
3. MacGDB (The more or less stable solution): Jumping to the
breakpoint (a few very quick clicks are necessary) and the site still works
and variables / functions are shown. Clicking not fast enough, a
"Internal Server Error" occurs before reaching the breakpoint. The
same happens with Step-Debugging up to the breakpoint. I suspect a

Is this normal behavior? Any hints how to go further are appreciated.
It is a symfony-framework based application. Firewall is disabled for
testing purposes on the linux machine.

Apache log shows a lot of the following lines with different pid, but other-
wise the info is not very helpfull:

[warn] mod_fcgid: process 10935 graceful kill fail, sending SIGKILL

What kind of logs, etc should i look for to find out the cause of the

Best regards
Received on Wed Jun 08 2011 - 10:43:36 BST

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