ask/celery — pull request #662 by ivirabyan (2012-04-11 09:19:53+00:00)
Title: Error while restarting using SIGHUP

There was an error, saying "Pidfile is already exists" while restarting
using SIGHUP. The problem arises only when "--pidfile" option is used.

Related to: https://github.com/ask/celery/issues/26