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  1. Jenkins
  2. JENKINS-53384

Jobs complain no free executor or offline node

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    • Icon: Bug Bug
    • Resolution: Duplicate
    • Icon: Minor Minor
    • build-blocker-plugin
    • Jenkins 2.89.4
      Windows OS
      Build-blocker-plugin V1.7.3

      Since two weeks we are experiencing that occasionally the Jenkins pipeline jobs are stating that there is no free executor or the node required to run the job is offline. Therefore the jobs are not executed but queued. When checking the respective node, it is running and has free executors. After restarting the master the situation recovers and queued builds start to run.

      I can see the following log entry on the master around the time when the jobs start stucking

      Sep 02, 2018 5:46:51 AM hudson.model.AsyncPeriodicWork$1 run
INFO: Finished DockerContainerWatchdog Asynchronous Periodic Work. 1 ms
Sep 02, 2018 5:49:59 AM jenkins.util.AtmostOneTaskExecutor$1 call
WARNING: null
java.lang.NullPointerException
    at hudson.plugins.buildblocker.BlockingJobsMonitor.checkNodeForQueueEntries(BlockingJobsMonitor.java:108)
    at hudson.plugins.buildblocker.BuildBlockerQueueTaskDispatcher.checkAccordingToProperties(BuildBlockerQueueTaskDispatcher.java:171)
    at hudson.plugins.buildblocker.BuildBlockerQueueTaskDispatcher.checkForBlock(BuildBlockerQueueTaskDispatcher.java:127)
    at hudson.plugins.buildblocker.BuildBlockerQueueTaskDispatcher.canTake(BuildBlockerQueueTaskDispatcher.java:110)
    at hudson.model.Queue$JobOffer.getCauseOfBlockage(Queue.java:273)
    at hudson.model.Queue.maintain(Queue.java:1597)
    at hudson.model.Queue$1.call(Queue.java:320)
    at hudson.model.Queue$1.call(Queue.java:317)
    at jenkins.util.AtmostOneTaskExecutor$1.call(AtmostOneTaskExecutor.java:108)
    at jenkins.util.AtmostOneTaskExecutor$1.call(AtmostOneTaskExecutor.java:98)
    at jenkins.security.ImpersonatingExecutorService$2.call(ImpersonatingExecutorService.java:71)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:110)
    at java.lang.Thread.run(Thread.java:748)
 
Sep 02, 2018 5:50:00 AM hudson.triggers.SafeTimerTask run
SEVERE: Timer task hudson.model.Queue$MaintainTask@495c6cda failed
java.lang.NullPointerException
    at hudson.plugins.buildblocker.BlockingJobsMonitor.checkNodeForQueueEntries(BlockingJobsMonitor.java:108)
    at hudson.plugins.buildblocker.BuildBlockerQueueTaskDispatcher.checkAccordingToProperties(BuildBlockerQueueTaskDispatcher.java:171)
    at hudson.plugins.buildblocker.BuildBlockerQueueTaskDispatcher.checkForBlock(BuildBlockerQueueTaskDispatcher.java:127)
    at hudson.plugins.buildblocker.BuildBlockerQueueTaskDispatcher.canTake(BuildBlockerQueueTaskDispatcher.java:110)
    at hudson.model.Queue$JobOffer.getCauseOfBlockage(Queue.java:273)
    at hudson.model.Queue.maintain(Queue.java:1597)
    at hudson.model.Queue$MaintainTask.doRun(Queue.java:2851)
    at hudson.triggers.SafeTimerTask.run(SafeTimerTask.java:51)
    at jenkins.security.ImpersonatingScheduledExecutorService$1.run(ImpersonatingScheduledExecutorService.java:58)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:748)

      In contrary to issue JENKINS-38729 which reports a similar problem (same error stack) we do not use the Build Blocker plugin.

      Yes we also have the build blocker plugin installed: V1.7.3 but we are not using it.

            oleg_nenashev Oleg Nenashev
            papanito papanito
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              Created:
              Updated:
              Resolved: