apache2 error.log seg faults

jhwilliams · 01-12-2009, 11:39 AM

Hello,

On my Debian Etch server, I'm finding a lot of the following in my /var/log/apache2/error.log file:

Code:

[Mon Jan 12 09:34:17 2009] [notice] child pid 17217 exit signal Segmentation fault (11)
[Mon Jan 12 09:34:18 2009] [notice] child pid 17206 exit signal Segmentation fault (11)
[Mon Jan 12 09:34:18 2009] [notice] child pid 17216 exit signal Segmentation fault (11)

What is a good way to trouble shoot and remedy this problem? We can't have processes dying all over the place, now can we.

Thanks!

chrism01 · 01-12-2009, 08:10 PM

The only time I usually see that error is when a C prog writes off the end of an array. Don't know if that'll help...

anomie · 01-12-2009, 09:40 PM

Quote:

Originally Posted by jhwilliams

What is a good way to trouble shoot and remedy this problem?

Crank it up to LogLevel debug, reload httpd, and check error_log for clues...

http://httpd.apache.org/docs/2.0/mod/core.html#loglevel

jhwilliams · 01-13-2009, 07:10 PM

Ah yes! A fine idea. Thanks anomie.

jhwilliams · 01-13-2009, 08:04 PM

but alas, with debug....

Code:

285 [Tue Jan 13 19:10:54 2009] [notice] Apache configured -- resuming normal operations
286 [Tue Jan 13 19:10:54 2009] [info] Server built: Sep  8 2008 09:03:05
287 [Tue Jan 13 19:10:54 2009] [debug] prefork.c(1016): AcceptMutex: sysvsem (default: sysvsem)
288 [Tue Jan 13 19:16:33 2009] [notice] child pid 3611 exit signal Segmentation fault (11)
289 [Tue Jan 13 19:16:33 2009] [notice] child pid 3660 exit signal Segmentation fault (11)
290 [Tue Jan 13 19:16:34 2009] [notice] child pid 3659 exit signal Segmentation fault (11)
291 [Tue Jan 13 19:16:35 2009] [notice] child pid 3606 exit signal Segmentation fault (11)
292 [Tue Jan 13 19:16:36 2009] [notice] child pid 3610 exit signal Segmentation fault (11)
293 [Tue Jan 13 19:16:37 2009] [notice] child pid 3609 exit signal Segmentation fault (11)
294 [Tue Jan 13 19:16:38 2009] [notice] child pid 3607 exit signal Segmentation fault (11)
295 [Tue Jan 13 19:47:51 2009] [notice] child pid 3764 exit signal Segmentation fault (11)
296 [Tue Jan 13 19:47:51 2009] [notice] child pid 3775 exit signal Segmentation fault (11)
297 [Tue Jan 13 19:47:52 2009] [notice] child pid 3773 exit signal Segmentation fault (11)
298 [Tue Jan 13 19:49:34 2009] [notice] child pid 3765 exit signal Segmentation fault (11)
299 [Tue Jan 13 19:58:49 2009] [notice] child pid 3767 exit signal Segmentation fault (11)

anomie · 01-13-2009, 10:51 PM

This thread help? Seems to be commonly related to mod_php.

jhwilliams · 01-15-2009, 08:21 PM

Hey anomie, yea -- good find. That's the thing. I redirected php logs to syslog and the "child PID" segfaults have now disappeared from my apache2 error log. Well, not entirely; but now they come one at a time instead of ACTIVE_CHILDREN* at a time. I am surprised and someone disappointed that this package made its way into the stable repos, but it is true that it's not actually causing me any functional trouble.

* ACTIVE_CHILDREN is a fictitious macro I invented to get my point across.