Jenkins script to find dead executors and remove them.

find-dead-executors.groovy

// get handle to build output
def config = new HashMap()
def bindings = getBinding()
config.putAll(bindings.getVariables())
def out = config['out']

for (aSlave in hudson.model.Hudson.instance.slaves) {
  // check if executor is dead
  execList = aSlave.getComputer().getExecutors()      
  for( exec in execList ) {
    if (exec.getCauseOfDeath()) {
      println("\tSlave ${aSlave.name} has a dead executor.")
      println("Error:")
      exec.getCauseOfDeath().printStackTrace(out) 
      println('\n')
      println("\tRemoving Dead Executor.")
      exec.doYank()
    }
  } 
}

I have single executor on master. So tried instance.master but got exception and I want to start that dead executor. Tried to search method for starting executor but no success.

Looks like this was using some old APIs, try it this way ...

// get handle to build output
def config = new HashMap()
def bindings = getBinding()
config.putAll(bindings.getVariables())
def out = config['out']


  jenkins.model.Jenkins.instance.getComputers().each { computer ->
  // check if executor is dead
  execList = computer.getExecutors()      
  for( exec in execList ) {
    if (exec.getCauseOfDeath()) {
      println("\tNode: ${computer.getDisplayName()}, executer ${exec.getDisplayName()} is dead.")
      println("Error:")
      exec.getCauseOfDeath().printStackTrace(out) 
      println('\n')
      println("\tRemoving Dead Executor.")
      exec.doYank()
    }
  }
}