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Posted to issues@ozone.apache.org by "Wei-Chiu Chuang (Jira)" <ji...@apache.org> on 2020/10/29 18:14:00 UTC
[jira] [Commented] (HDDS-3918) ConcurrentModificationException in
ContainerReportHandler.onMessage
[ https://issues.apache.org/jira/browse/HDDS-3918?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17223103#comment-17223103 ]
Wei-Chiu Chuang commented on HDDS-3918:
---------------------------------------
I see the exact same error on an Ozone 1.0.0 cluster. git history confirms my build has this fix.
{noformat}
2020-10-29 08:57:40,708 ERROR org.apache.hadoop.hdds.server.events.SingleThreadExecutor: Error on execution message org.apache.hadoop.hdds.scm.server.SCMDatanodeHeartbeatDispatcher$ContainerReportFromDatanode@5cf7595c
java.util.ConcurrentModificationException
at java.util.HashMap$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)
2020-10-29 08:57:44,920 ERROR org.apache.hadoop.hdds.server.events.SingleThreadExecutor: Error on execution message org.apache.hadoop.hdds.scm.server.SCMDatanodeHeartbeatDispatcher$ContainerReportFromDatanode@1011125f
java.util.ConcurrentModificationException
at java.util.HashMap$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)
{noformat}
It doesn't seem to cause any issue for me, so I'll just leave the record here.
> 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: Xiaoyu Yao
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.0.0
>
> Attachments: TestCME.java
>
>
> 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)
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