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Posted to issues@ozone.apache.org by "Wei-Chiu Chuang (Jira)" <ji...@apache.org> on 2020/12/01 15:01:00 UTC
[jira] [Commented] (HDDS-4534) ConcurrentModificationException in
ContainerReportHandler
[ https://issues.apache.org/jira/browse/HDDS-4534?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17241599#comment-17241599 ]
Wei-Chiu Chuang commented on HDDS-4534:
---------------------------------------
Like I reported in HDDS-3918, the issue was supposed to be fixed but still comes up from time to time.
> ConcurrentModificationException in ContainerReportHandler
> ---------------------------------------------------------
>
> Key: HDDS-4534
> URL: https://issues.apache.org/jira/browse/HDDS-4534
> Project: Hadoop Distributed Data Store
> Issue Type: Bug
> Components: SCM
> Reporter: Nanda kumar
> Assignee: Nanda kumar
> Priority: Major
>
> {{ConcurrentModificationException}} in SCM while processing container report.
> {code:java}
> 2020-11-23 05:36:53,097 ERROR org.apache.hadoop.hdds.server.events.SingleThreadExecutor: Error on execution message org.apache.hadoop.hdds.scm.server.SCMDatanodeHeartbeatDispatcher$ContainerReportFromDatanode@146b6117
> java.util.ConcurrentModificationException
> at java.util.HashMap$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) {code}
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