How do I clear stuck/stale Resque workers?
In your console:
queue_name = "process_numbers"
Resque.redis.del "queue:#{queue_name}"
Otherwise you can try to fake them as being done to remove them, with:
Resque::Worker.working.each {|w| w.done_working}
EDIT
A lot of people have been upvoting this answer and I feel that it's important that people try hagope's solution which unregisters workers off a queue, whereas the above code deletes queues. If you're happy to fake them, then cool.
None of these solutions worked for me, I would still see this in redis-web:
0 out of 10 Workers Working
Finally, this worked for me to clear all the workers:
Resque.workers.each {|w| w.unregister_worker}