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Type:
Bug
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Resolution: Fixed
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Priority:
Major
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Component/s: throttle-concurrent-builds-plugin
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Environment:Ubuntu 16.04.3 LTS
Jenkins 2.89.2
TCB 2.0.1
$ uname -a
Linux fwee-test-station 4.4.0-104-generic #127-Ubuntu SMP Mon Dec 11 12:16:42 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
$ java -version
openjdk version "1.8.0_151"
OpenJDK Runtime Environment (build 1.8.0_151-8u151-b12-0ubuntu0.16.04.2-b12)
OpenJDK 64-Bit Server VM (build 25.151-b12, mixed mode)Ubuntu 16.04.3 LTS Jenkins 2.89.2 TCB 2.0.1 $ uname -a Linux fwee-test-station 4.4.0-104-generic #127-Ubuntu SMP Mon Dec 11 12:16:42 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux $ java -version openjdk version "1.8.0_151" OpenJDK Runtime Environment (build 1.8.0_151-8u151-b12-0ubuntu0.16.04.2-b12) OpenJDK 64-Bit Server VM (build 25.151-b12, mixed mode)
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2.0.2
I started two builds of a pipeline job which uses the throttle step against a category. The category is configured to permit a maximum of one build at a time. The second build hit the throttled node step, waited for somewhere around 30–40 minutes, and then started executing anyway, despite the first build not having exited the throttled node step yet. I found this in my Jenkins log:
SEVERE: Timer task hudson.model.Queue$MaintainTask@63d577c failed java.util.ConcurrentModificationException at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1211) at java.util.TreeMap$EntryIterator.next(TreeMap.java:1247) at java.util.TreeMap$EntryIterator.next(TreeMap.java:1242) at hudson.plugins.throttleconcurrents.ThrottleJobProperty.getThrottledPipelineRunsForCategory(ThrottleJobProperty.java:316) at hudson.plugins.throttleconcurrents.ThrottleQueueTaskDispatcher.throttleCheckForCategoriesOnNode(ThrottleQueueTaskDispatcher.java:132) at hudson.plugins.throttleconcurrents.ThrottleQueueTaskDispatcher.canTakeImpl(ThrottleQueueTaskDispatcher.java:101) at hudson.plugins.throttleconcurrents.ThrottleQueueTaskDispatcher.canTake(ThrottleQueueTaskDispatcher.java:55) at hudson.model.queue.QueueTaskDispatcher.canTake(QueueTaskDispatcher.java:102) 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:2833) 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:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748)
