mongodb/mongo — pull request #443 by idank (2013-06-16 17:48:17+00:00)
Title: mongodb.upstart: chown dirs potentially created by pre-start stanza

Usually these are created by the the post-install script that runs after installing the package, but if those were rm'ed later on and then created by this script, their permission would be most likely set to root, causing mongod to fail starting.