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https://issues.apache.org/jira/browse/MAPREDUCE-3954?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Joseph Evans updated MAPREDUCE-3954:
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Status: Patch Available (was: Open)
> Clean up passing HEAPSIZE to yarn and mapred commands.
> ------------------------------------------------------
>
> Key: MAPREDUCE-3954
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3954
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 0.23.2
> Reporter: Robert Joseph Evans
> Assignee: Robert Joseph Evans
> Priority: Blocker
> Attachments: MR-3954.txt, MR-3954.txt
>
>
> Currently the heap size for all of these is set in yarn-env.sh.
> JAVA_HEAP_MAX is set to -Xmx1000m unless YARN_HEAPSIZE is set. If it is set
> it will override JAVA_HEAP_MAX. However, we do not always want to have the
> RM, NM, and HistoryServer with the exact same heap size. It would be logical
> to have inside of yarn and mapred to set JAVA_HEAP_MAX if
> YARN_RESOURCEMANAGER_HEAPSIZE, YARN_NODEMANAGER_HEAPSIZE or
> HADOOP_JOB_HISTORYSERVER_HEAPSIZE are set respectively. This is a bug
> because it is easy to configure the history server to store more entires then
> the heap can hold. It is also a performance issue if we do not allow the
> history server to cache many entries on a large cluster.
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