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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4671) AM does not tell the RM about container requests that are no longer needed
Date Thu, 07 Feb 2013 07:17:14 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4671?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13573261#comment-13573261
] 

Hudson commented on MAPREDUCE-4671:
-----------------------------------

Integrated in Hadoop-trunk-Commit #3338 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/3338/])
    MAPREDUCE-4671. AM does not tell the RM about container requests which are no longer needed.
Contributed by Bikas Saha. (Revision 1443323)

     Result = SUCCESS
sseth : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1443323
Files : 
* /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/rm/RMContainerRequestor.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/TestRMContainerAllocator.java

                
> AM does not tell the RM about container requests that are no longer needed
> --------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-4671
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4671
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 0.23.3, 2.0.0-alpha
>            Reporter: Bikas Saha
>            Assignee: Bikas Saha
>             Fix For: 2.0.4-beta
>
>         Attachments: MAPREDUCE-4671.1.patch, MAPREDUCE-4671.2.patch, MAPREDUCE-4671.3.patch,
MAPREDUCE-4671.4.patch, MAPREDUCE-4671.txt
>
>
> Say the AM wanted a container at hosts h1, h2, h3. After getting a container at h1 it
should tell RM that it no longer needs containers at h2, h3. Otherwise on the RM h2, h3 remain
valid allocation locations.
> The AM RMContainerAllocator does remove these resource requests internally. When the
resource request container count drops to 0 then it drops the resource request from its tables
but forgets to send the 0 sized request to the RM.

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