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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3010) ConcurrentModificationException from org.apache.hadoop.ipc.Server$Responder in JobTracker
Date Thu, 03 Apr 2008 12:12:24 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3010?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12585072#action_12585072
] 

Hadoop QA commented on HADOOP-3010:
-----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
http://issues.apache.org/jira/secure/attachment/12379060/HADOOP-3010.patch
against trunk revision 643282.

    @author +1.  The patch does not contain any @author tags.

    tests included -1.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no tests are needed for this patch.

    javadoc +1.  The javadoc tool did not generate any warning messages.

    javac +1.  The applied patch does not generate any new javac compiler warnings.

    release audit +1.  The applied patch does not generate any new release audit warnings.

    findbugs +1.  The patch does not introduce any new Findbugs warnings.

    core tests +1.  The patch passed core unit tests.

    contrib tests +1.  The patch passed contrib unit tests.

Test results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2137/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2137/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2137/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2137/console

This message is automatically generated.

> ConcurrentModificationException from org.apache.hadoop.ipc.Server$Responder in JobTracker
> -----------------------------------------------------------------------------------------
>
>                 Key: HADOOP-3010
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3010
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: ipc
>    Affects Versions: 0.16.1
>            Reporter: Amar Kamat
>            Assignee: Raghu Angadi
>             Fix For: 0.17.0
>
>         Attachments: HADOOP-3010.patch
>
>
> I see lot of these in my JobTracker log 
> {noformat}
> WARN org.apache.hadoop.ipc.Server: Exception in Responder java.util.ConcurrentModificationException
>         at java.util.HashMap$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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