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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3493) Add the default mapreduce.shuffle.port property to mapred-default.xml
Date Tue, 29 May 2012 13:25:23 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3493?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13284803#comment-13284803

Hadoop QA commented on MAPREDUCE-3493:

-1 overall.  Here are the results of testing the latest attachment 
  against trunk revision .

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

    -1 tests included.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

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

    +1 eclipse:eclipse.  The patch built with eclipse:eclipse.

    +1 findbugs.  The patch does not introduce any new Findbugs (version 1.3.9) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit

    +1 core tests.  The patch passed unit tests in hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core.

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

Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2422//testReport/
Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2422//console

This message is automatically generated.
> Add the default mapreduce.shuffle.port property to mapred-default.xml
> ---------------------------------------------------------------------
>                 Key: MAPREDUCE-3493
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3493
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 2.0.0-alpha
>            Reporter: Ahmed Radwan
>            Priority: Minor
>              Labels: newbie
>         Attachments: MAPREDUCE-3493-1.patch, MAPREDUCE-3493-2.patch, MAPREDUCE-3493-3.patch,
MAPREDUCE-3493.patch, MAPREDUCE-3943-4.patch, MAPREDUCE-3943-4.patch
> I faced this issue when trying to run multiple Hadoop MR2 instances on the same node.
The default value for this property is hardcoded in the ShuffleHandler.java class so it results
in port conflicts. The issue is resolved if you set the property value in your conf files.
But the absence of this property from *-default.xml files is confusing. So It'll be cleaner
to move this property to mapred-default.xml, so its default value can be easily identified
and changed if needed. 

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