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Date: Wed, 8 Feb 2012 02:47:03 +0000 (UTC)
From: "Hudson (Commented) (JIRA)" <jira@apache.org>
To: mapreduce-issues@hadoop.apache.org
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Subject: [jira] [Commented] (MAPREDUCE-3834) If multiple hosts for a split
 belong to the same rack, the rack is added multiple times in the AM request
 table
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    [ https://issues.apache.org/jira/browse/MAPREDUCE-3834?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13203198#comment-13203198 ] 

Hudson commented on MAPREDUCE-3834:
-----------------------------------

Integrated in Hadoop-Mapreduce-0.23-Commit #521 (See [https://builds.apache.org/job/Hadoop-Mapreduce-0.23-Commit/521/])
    MAPREDUCE-3834. Changed MR AM to not add the same rack entry multiple times into the container request table when multiple hosts for a split happen to be on the same rack. Contributed by Siddarth Seth.
svn merge --ignore-ancestry -c 1241734 ../../trunk/

vinodkv : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1241735
Files : 
* /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/CHANGES.txt
* /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/job/impl/TaskAttemptImpl.java
* /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/job/impl/TestTaskAttempt.java

                
> If multiple hosts for a split belong to the same rack, the rack is added multiple times in the AM request table
> ---------------------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-3834
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3834
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mr-am, mrv2
>    Affects Versions: 0.23.0
>            Reporter: Siddharth Seth
>            Assignee: Siddharth Seth
>            Priority: Critical
>             Fix For: 0.23.1
>
>         Attachments: MR3834.txt, MR3834.txt
>
>
> Should be added only once - so that the RM doesn't think there's multiple rack local requests for that particular rack.

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