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https://issues.apache.org/jira/browse/HADOOP-3010?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12585977#action_12585977
]
Hudson commented on HADOOP-3010:
--------------------------------
Integrated in Hadoop-trunk #451 (See
[http://hudson.zones.apache.org/hudson/job/Hadoop-trunk/451/])
> ConcurrentModificationException from org.apache.hadoop.ipc.Server$Responder
> in JobTracker
> -----------------------------------------------------------------------------------------
>
> Key: HADOOP-3010
> URL: https://issues.apache.org/jira/browse/HADOOP-3010
> Project: Hadoop Core
> Issue Type: Bug
> Components: ipc
> Affects Versions: 0.16.1
> Reporter: Amar Kamat
> Assignee: Raghu Angadi
> Fix For: 0.16.3
>
> Attachments: HADOOP-3010.patch
>
>
> I see lot of these in my JobTracker log
> {noformat}
> WARN org.apache.hadoop.ipc.Server: Exception in Responder
> java.util.ConcurrentModificationException
> at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
> at java.util.HashMap$KeyIterator.next(HashMap.java:827)
> at
> java.util.Collections$UnmodifiableCollection$1.next(Collections.java:1010)
> at org.apache.hadoop.ipc.Server$Responder.run(Server.java:475)
> {noformat}
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