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https://issues.apache.org/jira/browse/YARN-566?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gopal V updated YARN-566:
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Labels: usability (was: )
> Add a misconfiguration diagnostic or highlight mismatched resource.mb vs -Xmx
> -----------------------------------------------------------------------------
>
> Key: YARN-566
> URL: https://issues.apache.org/jira/browse/YARN-566
> Project: Hadoop YARN
> Issue Type: Improvement
> Reporter: Gopal V
> Priority: Minor
> Labels: usability
>
> It is possible to misconfigure a pure-java MR application by setting
> mapreduce resource size to 1536Mb, while leaving the -Xmx value at the
> default 512Mb.
> The AM UI can track over-all memory usage of an app either via
> Runtime.maxMemory() or via the process watcher in YARN to report the actual
> memory used by the application.
> MR does not fail even when the memory -Xmx is set lower than the YARN
> allocations, but it spills & GCs instead to keep it with in the memory sizes.
> This is sub-optimal and would make sense for YARN to highlight in the AM UI
> or JHS UI for tuning/debugging purposes.
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