kill-zombies.groovy

import com.cloudbees.hudson.plugins.folder.Folder
import org.jenkinsci.plugins.workflow.job.WorkflowRun 
import org.jenkinsci.plugins.workflow.support.steps.StageStepExecution 

dryRun = true

def printIfBuildIsRunning(job){
   def item = job.getLastBuild()
   
   if(item!=null && item.isBuilding()) { 
        if(item in WorkflowRun) {
            WorkflowRun run = (WorkflowRun) item 
            if(!dryRun) { 
                //hard kill
                run.doKill() 
                //release pipeline concurrency locks
                StageStepExecution.exit(run) 
            } 
            println "Killed ${run}" 
        } else if(item in FreeStyleBuild) {
            FreeStyleBuild run = (FreeStyleBuild) item 
            if(!dryRun) {
                run.executor.interrupt(Result.ABORTED) 
            } 
            println "Killed ${run}" 
        } else { 
            println "WARNING: Don't know how to handle ${item.class}" 
        } 
    } 
}

def killZombies(folder){
  def a = folder.getItems()
  a.each{
    if (it instanceof Folder)
       killZombies(it)
    else
      printIfBuildIsRunning(it)
  }
}

killZombies(Jenkins.instance)
true