sensu/sensu-community-plugins — pull request #583 by aliles (2014-05-12 12:00:23+00:00)
Title: Optionally require PID file to be present

Allow the check-procs command the fail with warning status if the PID
file can not be found. Some applications will remove the PID file after
the application exists. However, it may be desirable to fail with a
warning message to trigger appropriate notifications.