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https://issues.apache.org/jira/browse/MAPREDUCE-1287?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12797983#action_12797983
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Hadoop QA commented on MAPREDUCE-1287:
--------------------------------------

+1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12429732/M1287-6.patch
  against trunk revision 897118.

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

    +1 tests included.  The patch appears to include 6 new or modified tests.

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

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

    +1 findbugs.  The patch does not introduce any new Findbugs warnings.

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

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

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

Test results: 
http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h6.grid.sp2.yahoo.net/366/testReport/
Findbugs warnings: 
http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h6.grid.sp2.yahoo.net/366/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: 
http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h6.grid.sp2.yahoo.net/366/artifact/trunk/build/test/checkstyle-errors.html
Console output: 
http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h6.grid.sp2.yahoo.net/366/console

This message is automatically generated.

> Avoid calling Partitioner with only 1 reducer
> ---------------------------------------------
>
>                 Key: MAPREDUCE-1287
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1287
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>    Affects Versions: 0.22.0
>            Reporter: Ed Mazur
>            Assignee: Ed Mazur
>            Priority: Minor
>             Fix For: 0.22.0
>
>         Attachments: M1287-4.patch, M1287-5.patch, M1287-6.patch, 
> MAPREDUCE-1287.2.patch, MAPREDUCE-1287.3.patch, MAPREDUCE-1287.patch
>
>
> Partitioners are currently called for each record, even though all are 
> destined for the same reduce.

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