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From "Koji Noguchi (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-3010) ConcurrentModificationException from org.apache.hadoop.ipc.Server$Responder in JobTracker
Date Tue, 01 Apr 2008 05:00:25 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-3010?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Koji Noguchi updated HADOOP-3010:
---------------------------------

    Affects Version/s: 0.16.1

As Nigel mentioned in HADOOP-3141, we are seeing this on namenode logs as well.

> ConcurrentModificationException from org.apache.hadoop.ipc.Server$Responder in JobTracker
> -----------------------------------------------------------------------------------------
>
>                 Key: HADOOP-3010
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3010
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: ipc
>    Affects Versions: 0.16.1
>            Reporter: Amar Kamat
>
> I see lot of these in my JobTracker log 
> {noformat}
> WARN org.apache.hadoop.ipc.Server: Exception in Responder java.util.ConcurrentModificationException
>         at java.util.HashMap$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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