TYPO3 Core

Apache/2.2.3 (Debian)
TYPO3 4.2.12
PHP Version 5.2.0-8+etch16
GD Version 2.0 or higher

I've got a problem with the jpg Thumbnail generation on some pdf, not on all.

www-data 32469 0.0 0.1 10324 3484 ? S 09:10 0:00 /usr/bin/gm convert -geometry 200x200! -colorspace RGB -quality 85 /var/www/www.cmne.ch/fileadmin/documents/Agenda/PDF/samedis0910E.pdf /var/www/www.cmne.ch/typo3temp/pics/5621d427d1.jpg

On some pdf, the system can't generate the Thumbnail (I don't know why), but the process on the server continue to run and when I restart apache, apache can't start because the process is still running on the 80 port.

(98)Address already in use: make_sock: could not bind to address
1.2.3.4:80 no listening sockets available, shutting down
Unable to open logs
error: error running shared postrotate script
for /var/log/apache2/*log run-parts: /etc/cron.daily/logrotate exited
with return code 1

Any possibility to have a timeout on the process ?

(issue imported from #M13979)