It happens randomly, and only on moodle installations. Apache don't add a line in the logs when this happens, and I don't know where to look.
koke@escher:~/Code/eboxhq/moodle[master]$ curl -I http://training.ebox-technologies.com/login/signup.php?course=WNA001
curl: (52) Empty reply from server
koke@escher:~/Code/eboxhq/moodle[master]$ curl -I http://training.ebox-technologies.com/login/signup.php?course=WNA001
HTTP/1.1 200 OK
The apache conf is quite straightforward and works perfectly in the other vhosts
<VirtualHost *:80>
ServerAdmin [email protected]
DocumentRoot /srv/apache/training.ebox-technologies.com/htdocs
ServerName training.eboxhq.com
ErrorLog /var/log/apache2/training.ebox-technologies.com-error.log
CustomLog /var/log/apache2/training.ebox-technologies.com-access.log combined
<FilesMatch "\.(ico|gif|jpe?g|png|js|css)$">
ExpiresActive On
ExpiresDefault "access plus 1 week"
Header add Cache-Control public
</FilesMatch>
</VirtualHost>
Using apache 2.2.9 php 5.2.6 and moodle 1.9.5+ (Build: 20090722)
Any ideas welcome :)