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Sammi Chen commented on HDDS-3918: ---------------------------------- [~jnp] I usually see it after SCM restart. > ConcurrentModificationException in ContainerReportHandler.onMessage > ------------------------------------------------------------------- > > Key: HDDS-3918 > URL: https://issues.apache.org/jira/browse/HDDS-3918 > Project: Hadoop Distributed Data Store > Issue Type: Bug > Reporter: Sammi Chen > Assignee: Nanda kumar > Priority: Major > > 2020-07-03 14:51:45,489 [EventQueue-ContainerReportForContainerReportHandler] > ERROR org.apache.hadoop.hdds.server.events.SingleThreadExecutor: Error on > execution message > org.apache.hadoop.hdds.scm.server.SCMDatanodeHeartbeatDispatcher$ContainerReportFromDatanode@8f6e7cb > java.util.ConcurrentModificationException > at java.util.HashMap$HashIterator.nextNode(HashMap.java:1445) > at java.util.HashMap$KeyIterator.next(HashMap.java:1469) > at > java.util.Collections$UnmodifiableCollection$1.next(Collections.java:1044) > at java.util.AbstractCollection.addAll(AbstractCollection.java:343) > at java.util.HashSet.<init>(HashSet.java:120) > at > org.apache.hadoop.hdds.scm.container.ContainerReportHandler.onMessage(ContainerReportHandler.java:127) > at > org.apache.hadoop.hdds.scm.container.ContainerReportHandler.onMessage(ContainerReportHandler.java:50) > at > org.apache.hadoop.hdds.server.events.SingleThreadExecutor.lambda$onMessage$1(SingleThreadExecutor.java:81) > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) > at java.lang.Thread.run(Thread.java:748) > 2020-07-03 14:51:45,648 [EventQueue-ContainerReportForContainerReportHandler] > ERROR org.apache.hadoop.hdds.server.events.SingleThreadExecutor: Error on > execution message > org.apache.hadoop.hdds.scm.server.SCMDatanodeHeartbeatDispatcher$ContainerReportFromDatanode@49d2b84b > java.util.ConcurrentModificationException > at java.util.HashMap$HashIterator.nextNode(HashMap.java:1445) > at java.util.HashMap$KeyIterator.next(HashMap.java:1469) > at > java.util.Collections$UnmodifiableCollection$1.next(Collections.java:1044) > at java.util.AbstractCollection.addAll(AbstractCollection.java:343) > at java.util.HashSet.<init>(HashSet.java:120) > at > org.apache.hadoop.hdds.scm.container.ContainerReportHandler.onMessage(ContainerReportHandler.java:127) > at > org.apache.hadoop.hdds.scm.container.ContainerReportHandler.onMessage(ContainerReportHandler.java:50) > at > org.apache.hadoop.hdds.server.events.SingleThreadExecutor.lambda$onMessage$1(SingleThreadExecutor.java:81) > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) > at java.lang.Thread.run(Thread.java:748) -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: ozone-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: ozone-issues-h...@hadoop.apache.org