[php-maint] Bug#431799: php5-cgi: PHP fastcgi with PHP_FCGI_CHILDREN doesn't kill children when parent is killed

[Raphael Geissert]

Package: php5-cgi
Version: 5.2.0-8+etch4
Severity: important
Tags: patch

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Quoting from: http://bugs.php.net/bug.php?id=40286 
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Context:
When running PHP in FastCGI mode with a fastCGI apache module (such a
mod_fcgid), all is running fine when PHP_FCGI_CHILDREN unset : only 1
process spawned. When using PHP_FCGI_CHILDREN=n, the PHP parent process
forks n childs, and the parent acts as a manager between the child
processes, wait()ing to respawn them if they are killed or exit. The
problem happens when the FastCGI process manager handled by the apache
module has to kill the parent PHP process (it only knows the parent's
PID) for any reason such as idle timeout, max lifetime, etc.

Problem:
While the PHP parent process is properly killed by the FastCGI process
manager, the children aren't killed, but instead stay alive, waiting for
a new request which will never come (because the socket shared with the
parent is removed at the same time parent is killed).
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At the end of the PHP bug report there's a patch.
PHP4 Is also affected (and I guess, but can't confirm, lenny's PHP4/5 are also affected).

This bug causes a lot useless php[4|5]-cgi processes to remain on memory and thus consuming resources.
I hope a fixed php[4|5]-cgi package can make into etch's r1 or even before (if possible).


- -- System Information:
Debian Release: lenny/sid
  APT prefers testing
  APT policy: (500, 'testing'), (100, 'unstable')
Architecture: i386 (i686)

Kernel: Linux 2.6.21-1-686 (SMP w/1 CPU core)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

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