Resque (workers and derivatives) - OregonDigital/oregondigital GitHub Wiki
On hydra-worker1.l.o.e, at a shell prompt:
Find the parent process:
ps -e -o pid,command | grep [r]esque
Look for "Forked N at T" then issue kill -9 for the process:
kill -9 {process ID (N)}
That should kill the job process and the worker should resume working on a new job.
http://engineering.hoteltonight.com/killing-stale-or-stuck-resque-jobs/