Unstick Stuck Docker executor jobs

unstick.groovy

import hudson.model.labels.*;

node ('master') {
    Jenkins.instance.queue.items.each {
        //http://javadoc.jenkins-ci.org/hudson/model/Queue.Item.html#isStuck--
        //Means that buildable is "starved" and should have already run but no executor is available
        //if this is on a docker template, there is no reason it shouldn't have already run.
        if(it.stuck && !it.blocked)
        {
          	println("Found stuck job - " + it.task.name + "- checking docker to see if we can unstick")
            def label=it.assignedLabel.getName()
            Jenkins.instance.clouds.any { dockerCloud ->
                def foundTemplate = false;
                if(dockerCloud.class.name.equals("com.nirima.jenkins.plugins.docker.DockerCloud"))
                {
                    dockerCloud.templates.each { template ->
                        template.labelString.split(' ').each{ splitLabel ->
    
                            if(splitLabel.equals(label)){
                                println(dockerCloud.name + " - " + template.labelString + " - provisioning...")
                                //dockerCloud.provision(new LabelAtom(label),1)
                                foundTemplate = true
                            }
                        }
                    }
                    if (foundTemplate)
                    {
                        return true
                    }
                        return
                }
            }
        }
    }

}