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https://issues.apache.org/jira/browse/MAPREDUCE-4966?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13564850#comment-13564850
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Thomas Graves commented on MAPREDUCE-4966:
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this already exists - HADOOP_JOB_HISTORYSERVER_OPTS. There is also
HADOOP_JOB_HISTORYSERVER_HEAPSIZE.
see
http://svn.apache.org/viewvc/hadoop/common/trunk/hadoop-mapreduce-project/conf/mapred-env.sh?revision=1390224&view=markup
> Env variable for JobHistory JVM OPTS
> ------------------------------------
>
> Key: MAPREDUCE-4966
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4966
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: jobhistoryserver
> Affects Versions: 2.0.2-alpha
> Reporter: Lohit Vijayarenu
> Priority: Minor
>
> There seems to be no option to set JVM OPTS for JobHistoryServer. One of the
> common setting is having Xmx value passed to it. As of now it can be done
> only via JVM_OPTS or HADOOP_CLIENT_OPTS. It would be good to have something
> specific for JobHistoryServer
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