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Bug
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Resolution: Duplicate
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Minor
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None
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1.625.3 (Jenkins core)
1.11 (workflow plugin)
This workflow:
node {
echo "hello world"
}
results in:
Started by user anonymous
[Workflow] Allocate node : Start
Still waiting to schedule task
Waiting for next available executor
There are plenty of executors available, and other non-workflow jobs are able to allocate one. I see the same issue on separate similarly-configured Jenkins instances.
Log:
Dec 10 12:55:11 ip-172-29-0-82 [jenkins]: SEVERE: Timer task hudson.model.Queue$MaintainTask@2054b466 failed
Dec 10 12:55:11 ip-172-29-0-82 [jenkins]: java.lang.ClassCastException: org.jenkinsci.plugins.workflow.support.steps.ExecutorStepExecution$PlaceholderTask cannot be cast to hudson.model.AbstractProject
Dec 10 12:55:11 ip-172-29-0-82 [jenkins]: #011at hudson.plugins.buildblocker.BuildBlockerQueueTaskDispatcher.getBuildBlockerProperty(BuildBlockerQueueTaskDispatcher.java:199)
Dec 10 12:55:11 ip-172-29-0-82 [jenkins]: #011at hudson.plugins.buildblocker.BuildBlockerQueueTaskDispatcher.canTake(BuildBlockerQueueTaskDispatcher.java:108)
Dec 10 12:55:11 ip-172-29-0-82 [jenkins]: #011at hudson.model.Queue$JobOffer.canTake(Queue.java:301)
Dec 10 12:55:11 ip-172-29-0-82 [jenkins]: #011at hudson.model.Queue.maintain(Queue.java:1544)
Dec 10 12:55:11 ip-172-29-0-82 [jenkins]: #011at hudson.model.Queue$MaintainTask.doRun(Queue.java:2709)
Dec 10 12:55:11 ip-172-29-0-82 [jenkins]: #011at hudson.triggers.SafeTimerTask.run(SafeTimerTask.java:51)
Dec 10 12:55:11 ip-172-29-0-82 [jenkins]: #011at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
Dec 10 12:55:11 ip-172-29-0-82 [jenkins]: #011at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:304)
Dec 10 12:55:11 ip-172-29-0-82 [jenkins]: #011at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:178)
Dec 10 12:55:11 ip-172-29-0-82 [jenkins]: #011at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
Dec 10 12:55:11 ip-172-29-0-82 [jenkins]: #011at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
Dec 10 12:55:11 ip-172-29-0-82 [jenkins]: #011at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
Dec 10 12:55:11 ip-172-29-0-82 [jenkins]: #011at java.lang.Thread.run(Thread.java:745)