Hi there,

I think we need help of some 'guru' at this time 

Our Apache2 (mpm-prefork) is segfaulting on a given webapp (only with
that app) and it's spawning users with -php- sessions opened. Other
PHP/MySQL-based apps running with the same are working ok (mediawiki,
phpchain, phpmyadmin...). The error message is something like the
following:

[Thu Mar 15 13:40:15 2007] [notice] Apache/2.0.54 (Debian GNU/Linux)
PHP/5.2.1 configured -- resuming normal operations
[Thu Mar 15 13:41:47 2007] [notice] child pid 10531 exit signal
Segmentation fault (11)
[Thu Mar 15 13:41:47 2007] [notice] child pid 10532 exit signal
Segmentation fault (11)
[Thu Mar 15 13:41:56 2007] [notice] child pid 10533 exit signal
Segmentation fault (11)
[Thu Mar 15 13:42:01 2007] [notice] child pid 10535 exit signal
Segmentation fault (11)
[Thu Mar 15 13:42:12 2007] [notice] child pid 10529 exit signal
Segmentation fault (11)
[Thu Mar 15 13:43:18 2007] [notice] child pid 10530 exit signal
Segmentation fault (11)

When it happens, top shows that one apache process hits a high cpu
usage rate (approx. 65%) before failing.

Our app interacts with debian's current mysql-server-4.1 and a self-
compiled php 5.2.1. We've been using self/custom-compiled php since
5.0 version without showing this problem, and then it arised from
nowhere. We've tryied this same configuration on several (3) machines
with same results (we wanted to discard some hardware problem, and we
did, but no clue what's really happening).

Tests has also been done with default & custom apache2/mysql configs,
with same results (chlid processes segfault, but main process still
remains, so there's core-dump option).

Could you please suggest any test/hint to try to understand what could
be happening?

Kind regards,
jors

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