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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4801) ShuffleHandler can generate large logs due to prematurely closed channels
Date Thu, 15 Nov 2012 23:35:12 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4801?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13498442#comment-13498442
] 

Hadoop QA commented on MAPREDUCE-4801:
--------------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12553716/MAPREDUCE-4801.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 1 new or modified
test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-shuffle.

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/3035//testReport/
Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/3035//console

This message is automatically generated.
                
> ShuffleHandler can generate large logs due to prematurely closed channels
> -------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-4801
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4801
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 0.23.3, 2.0.1-alpha
>            Reporter: Jason Lowe
>            Assignee: Jason Lowe
>            Priority: Critical
>         Attachments: MAPREDUCE-4801.patch
>
>
> We ran into an instance where many nodes on a cluster ran out of disk space because the
nodemanager logs were huge.  Examining the logs showed many, many shuffle errors due to either
ClosedChannelException or IOException from "Connection reset by peer" or "Broken pipe".

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