Php5-fpm on ubuntu 14.04 stop: Unknown instance:

Error: stop: Unknown instance:

It is know bug add

first kill all php5-fpm instances than

Workaround (untested): add the line “reload signal USR2 to /etc/init/php5-fpm.conf.

https://bugs.launchpad.net/ubuntu/+source/php5/+bug/1242376