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https://issues.apache.org/jira/browse/MAPREDUCE-1198?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12779268#action_12779268
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Hadoop QA commented on MAPREDUCE-1198:
--------------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  
http://issues.apache.org/jira/secure/attachment/12425272/MAPREDUCE-1198-v2.patch
  against trunk revision 881536.

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

    +1 tests included.  The patch appears to include 3 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 failed 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/249/testReport/
Findbugs warnings: 
http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h6.grid.sp2.yahoo.net/249/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: 
http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h6.grid.sp2.yahoo.net/249/artifact/trunk/build/test/checkstyle-errors.html
Console output: 
http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h6.grid.sp2.yahoo.net/249/console

This message is automatically generated.

> Alternatively schedule different types of tasks in fair share scheduler
> -----------------------------------------------------------------------
>
>                 Key: MAPREDUCE-1198
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1198
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: contrib/fair-share
>    Affects Versions: 0.22.0
>            Reporter: Scott Chen
>            Assignee: Scott Chen
>             Fix For: 0.22.0
>
>         Attachments: MAPREDUCE-1198-v1.patch, MAPREDUCE-1198-v2.patch
>
>
> Matei has mentioned in MAPREDUCE-961 that the current scheduler will first 
> try to launch map tasks until canLaunthTask() returns false then look for 
> reduce tasks. This might starve reduce task. He also mention that 
> alternatively schedule different types of tasks can solve this problem.

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