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https://issues.apache.org/jira/browse/MAPREDUCE-2632?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14535444#comment-14535444
]
Hudson commented on MAPREDUCE-2632:
-----------------------------------
FAILURE: Integrated in Hadoop-trunk-Commit #7778 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/7778/])
MAPREDUCE-2632. Avoid calling the partitioner when the numReduceTasks is 1.
(Ravi Teja Ch N V and Sunil G via kasha) (kasha: rev
bdbd10fde1539920de937404a785e6ed34dd5628)
*
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/test/java/org/apache/hadoop/mapreduce/lib/output/TestMapFileOutputFormat.java
*
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/output/MapFileOutputFormat.java
*
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/Partitioner.java
*
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/Partitioner.java
*
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/test/java/org/apache/hadoop/mapred/TestMapFileOutputFormat.java
* hadoop-mapreduce-project/CHANGES.txt
*
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/MapFileOutputFormat.java
> 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
> Affects Versions: 0.23.0
> Reporter: Ravi Teja Ch N V
> Assignee: Sunil G
> Fix For: 3.0.0
>
> Attachments: 0001-MAPREDUCE-2632.patch, MAPREDUCE-2632-1.patch,
> MAPREDUCE-2632.patch, mr-2632-2.patch, mr-2632-3.patch, mr-2632-4.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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