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ASF GitHub Bot commented on NIFI-2337: -------------------------------------- Github user asfgit closed the pull request at: https://github.com/apache/nifi/pull/731 > IllegalMonitorStateException when disconnecting node > ---------------------------------------------------- > > Key: NIFI-2337 > URL: https://issues.apache.org/jira/browse/NIFI-2337 > Project: Apache NiFi > Issue Type: Bug > Components: Core Framework > Affects Versions: 1.0.0 > Reporter: Mark Payne > Assignee: Joseph Witt > Fix For: 1.0.0 > > > When a node is disconnected from the cluster, it often logs a stacktrace > similar to: > 2016-07-20 20:20:47,814 ERROR [Leader Election Notification Thread-1] > o.a.c.f.recipes.leader.LeaderSelector The leader threw an exception > java.lang.IllegalMonitorStateException: You do not own the lock: > /leaders/Cluster Coordinator > at > org.apache.curator.framework.recipes.locks.InterProcessMutex.release(InterProcessMutex.java:140) > ~[curator-recipes-2.10.0.jar:na] > at > org.apache.curator.framework.recipes.leader.LeaderSelector.doWork(LeaderSelector.java:425) > [curator-recipes-2.10.0.jar:na] > at > org.apache.curator.framework.recipes.leader.LeaderSelector.doWorkLoop(LeaderSelector.java:441) > [curator-recipes-2.10.0.jar:na] > at > org.apache.curator.framework.recipes.leader.LeaderSelector.access$100(LeaderSelector.java:64) > [curator-recipes-2.10.0.jar:na] > at > org.apache.curator.framework.recipes.leader.LeaderSelector$2.call(LeaderSelector.java:245) > [curator-recipes-2.10.0.jar:na] > at > org.apache.curator.framework.recipes.leader.LeaderSelector$2.call(LeaderSelector.java:239) > [curator-recipes-2.10.0.jar:na] > at java.util.concurrent.FutureTask.run(FutureTask.java:266) > [na:1.8.0_74] > at > java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) > [na:1.8.0_74] > at java.util.concurrent.FutureTask.run(FutureTask.java:266) > [na:1.8.0_74] > at > java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) > [na:1.8.0_74] > at java.util.concurrent.FutureTask.run(FutureTask.java:266) > [na:1.8.0_74] > at > java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) > [na:1.8.0_74] > at > java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) > [na:1.8.0_74] > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) > [na:1.8.0_74] > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) > [na:1.8.0_74] > at java.lang.Thread.run(Thread.java:745) [na:1.8.0_74] > This error, I believe, is harmless but is alarming and should be addressed. -- This message was sent by Atlassian JIRA (v6.3.4#6332)