How do I clear stuck/stale Resque workers?

Question

As you can see from the attached image, I\'ve got a couple of workers that seem to be stuck. Those processes shouldn\'t take longer than a couple of seconds.

Answer 1

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

Answer 2

If you use Docker, you can also use this command:

<id> is the worker id.

docker stop <id>

docker start <id>

Answer 3

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.