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https://issues.apache.org/jira/browse/MAPREDUCE-2632?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13057820#comment-13057820
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Hadoop QA commented on MAPREDUCE-2632:
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-1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12484759/MAPREDUCE-2632.patch
against trunk revision 1140942.
+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 (version 1.3.9)
warnings.
+1 release audit. The applied patch does not increase the total number of
release audit warnings.
-1 core tests. The patch failed these core unit tests:
org.apache.hadoop.cli.TestMRCLI
org.apache.hadoop.fs.TestFileSystem
-1 contrib tests. The patch failed contrib unit tests.
+1 system test framework. The patch passed system test framework compile.
Test results:
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/433//testReport/
Findbugs warnings:
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/433//artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output:
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/433//console
This message is automatically generated.
> Avoid calling the partitioner when the numReduceTasks is 1.
> -----------------------------------------------------------
>
> Key: MAPREDUCE-2632
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2632
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: tasktracker
> Affects Versions: 0.23.0
> Reporter: Ravi Teja Ch N V
> Attachments: MAPREDUCE-2632.patch
>
>
> We can avoid the call to the partitioner when the number of reducers is
> 1.This will avoid the unnecessary computations by the partitioner.
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