How do I clear stuck/stale Resque workers?

Question

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}

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.

You probably have the resque gem installed, so you can open the console and get current workers

Resque.workers

It returns a list of workers

#=> [#<Worker infusion.local:40194-0:JAVA_DYNAMIC_QUEUES,index_migrator,converter,extractor>]

pick the worker and prune_dead_workers, for example the first one

Resque.workers.first.prune_dead_workers

Adding to answer by hagope, I wanted to be able to only unregister workers that had been running for a certain amount of time. The code below will only unregister workers running for over 300 seconds (5 minutes).

Resque.workers.each {|w| w.unregister_worker if w.processing['run_at'] && Time.now - w.processing['run_at'].to_time > 300}

I have an ongoing collection of Resque related Rake tasks that I have also added this to: https://gist.github.com/ewherrmann/8809350

Run this command wherever you ran the command to start the server

$ ps -e -o pid,command | grep [r]esque

you should see something like this:

92102 resque: Processing ProcessNumbers since 1253142769

Make note of the PID (process id) in my example it is 92102

Then you can quit the process 1 of 2 ways.

• Gracefully use QUIT 92102

• Forcefully use TERM 92102

* I'm not sure of the syntax it's either QUIT 92102 or QUIT -92102

Let me know if you have any trouble.

I just did:

% rails c production
irb(main):001:0>Resque.workers

Got the list of workers.

irb(main):002:0>Resque.remove_worker(Resque.workers[n].id)

... where n is the zero based index of the unwanted worker.