How to kill a job running inside a worker process?

[runlevel5]

@mperham explained to me that you could not kill a thread in a worker process as it is quite dangerous. However for my usecase, I need total control on job killing. I am thinking of running multiple workers each with 1 thread, so I could kill the PID instead. It does come with a resource cost though. And then @mperham suggested this: "or have the worker thread check if should it halt". I don't truly understand what does it mean, this ticket is dedicated for explanation on that

[mperham]

Can you explain the job your worker is performing? At a high level, I'm speaking something like this:

def perform
  while active? && !done
    do_something
  end
end

The active? check could verify the job has not been cancelled. That's the point of the JID: it's a global identifier you can use to power this type of thing.

[runlevel5]

@mperham I think you misunderstand me. In my use case, some job takes too long and I could not figure out how to kill a single job (which is probably running in a thread)

[mperham]

You cannot stop a job that is taking too long. The only thing you can do is shut down the Sidekiq process and restart it.