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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4671) AM does not tell the RM about container requests that are no longer needed
Date Wed, 10 Oct 2012 06:59:04 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4671?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13473035#comment-13473035
] 

Hadoop QA commented on MAPREDUCE-4671:
--------------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12548529/MAPREDUCE-4671.3.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-app.

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

Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2923//testReport/
Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2923//console

This message is automatically generated.
                
> 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
>         Attachments: MAPREDUCE-4671.1.patch, MAPREDUCE-4671.2.patch, MAPREDUCE-4671.3.patch
>
>
> 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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