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https://issues.apache.org/jira/browse/MAPREDUCE-6696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15292581#comment-15292581
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Hudson commented on MAPREDUCE-6696:
-----------------------------------
SUCCESS: Integrated in Hadoop-trunk-Commit #9829 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/9829/])
MAPREDUCE-6696. Add a configuration to limit the number of map tasks (jianhe:
rev 21d2b90213e8e188bcac31f9360c5176ac89d083)
*
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestLocalJobSubmission.java
*
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/resources/mapred-default.xml
*
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/MRJobConfig.java
*
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/JobSubmitter.java
> Add a configuration to limit the number of map tasks allowed per job.
> ---------------------------------------------------------------------
>
> Key: MAPREDUCE-6696
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6696
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: job submission
> Affects Versions: 2.8.0
> Reporter: zhihai xu
> Assignee: zhihai xu
> Fix For: 2.9.0
>
> Attachments: MAPREDUCE-6696.000.patch, MAPREDUCE-6696.001.patch,
> MAPREDUCE-6696.002.patch, MAPREDUCE-6696.003.patch, MAPREDUCE-6696.004.patch
>
>
> Add a configuration "mapreduce.job.max.map" to limit the number of map tasks
> allowed per job. It will be useful for Hadoop admin to save Hadoop cluster
> resource by preventing users from submitting big mapreduce jobs. A mapredeuce
> job with too many mappers may fail with OOM after running for long time. It
> will be a big waste.
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