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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-6171) ConcurrentModificationException on FSAppAttempt.containersToPreempt
Date Thu, 16 Feb 2017 23:35:41 GMT

    [ https://issues.apache.org/jira/browse/YARN-6171?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15870881#comment-15870881
] 

Hudson commented on YARN-6171:
------------------------------

SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #11268 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/11268/])
YARN-6171. ConcurrentModificationException on (kasha: rev a77f432449aad67da31bd8bf8644b71def741bde)
* (edit) hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/FairScheduler.java
* (edit) hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/FSAppAttempt.java


> ConcurrentModificationException on FSAppAttempt.containersToPreempt
> -------------------------------------------------------------------
>
>                 Key: YARN-6171
>                 URL: https://issues.apache.org/jira/browse/YARN-6171
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: fairscheduler
>    Affects Versions: 3.0.0-alpha2
>            Reporter: Miklos Szegedi
>            Assignee: Miklos Szegedi
>             Fix For: 2.9.0, 3.0.0-alpha3
>
>         Attachments: YARN-6171.000.patch, YARN-6171.001.patch, YARN-6171.002.patch, YARN-6171.003.patch,
YARN-6171.004.patch
>
>
> I have noticed an exception that closes the Application Master occasionally with Fair
scheduler.
> {code}
> Caused by: org.apache.hadoop.ipc.RemoteException(java.util.ConcurrentModificationException):
java.util.ConcurrentModificationException
> 	at java.util.HashMap$HashIterator.nextEntry(HashMap.java:922)
> 	at java.util.HashMap$KeyIterator.next(HashMap.java:956)
> 	at org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.allocate(FairScheduler.java:1005)
> 	at org.apache.hadoop.yarn.server.resourcemanager.ApplicationMasterService.allocate(ApplicationMasterService.java:532)
> 	at org.apache.hadoop.yarn.api.impl.pb.service.ApplicationMasterProtocolPBServiceImpl.allocate(ApplicationMasterProtocolPBServiceImpl.java:60)
> 	at org.apache.hadoop.yarn.proto.ApplicationMasterProtocol$ApplicationMasterProtocolService$2.callBlockingMethod(ApplicationMasterProtocol.java:99)
> 	at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:617)
> 	at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1073)
> {code}



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