Question

I have installed the new Symfony 2.1 framework on my local server

when i run http://www.myhost.com/app_dev.php

i get on my browser

Error 324 (net::ERR_EMPTY_RESPONSE): The server closed the connection without sending any data.

and when i checkout my /var/log/apache2/error.log file, i see

[Tue Apr 24 12:03:43 2012] [notice] seg fault or similar nasty error detected in the parent process
[Tue Apr 24 12:03:44 2012] [notice] Apache/2.2.22 (Ubuntu) PHP/5.4.0-3~precise+4 configured -- resuming normal operations
[Tue Apr 24 12:03:58 2012] [notice] child pid 3016 exit signal Segmentation fault (11)
[Tue Apr 24 12:03:59 2012] [notice] child pid 3014 exit signal Segmentation fault (11)
[Tue Apr 24 12:04:00 2012] [notice] child pid 3025 exit signal Segmentation fault (11)
[Tue Apr 24 12:04:01 2012] [notice] child pid 3013 exit signal Segmentation fault (11)
[Tue Apr 24 12:04:24 2012] [notice] child pid 3012 exit signal Segmentation fault (11)

how can i debug, or better solve this issue?

Answer 1

Usually the reason why PHP makes an httpd segfault (without leaving a core dump, I suppose) is a faulty extension in PHP, or a combination of two incompatible ones.

Examples are:

• APC + XCache (or, in general two accelerators)
• suhosin + xdebug