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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-6696) Add a configuration to limit the number of map tasks allowed per job.
Date Fri, 20 May 2016 02:35:12 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-6696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15292581#comment-15292581
] 

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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