How to stop an unstoppable zombie job on Jenkins without restarting the server?

Question

Our Jenkins server has a job that has been running for three days, but is not doing anything. Clicking the little X in the corner does nothing, and the console output log do

Answer 1

A utility I wrote called jkillthread can be used to stop any thread in any Java process, so long as you can log in to the machine running the service under the same account.