[feedquote='Trac','http://trac.i-mscp.net/ticket/1106#comment:2']
This issue can be fixed easily by adding the file /etc/init/php5-fpm.override with the following content:
Here upstart will first read /etc/.init/php5-fpm.conf, and then apply any changes in /etc/.config/upstart/php5-fpm.override (as of Upstart v1.7).
To resume, the file will fix the issue on Ubuntu >= Trusty while it will be ignored on older Ubuntu version (expected).
[/feedquote]