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https://issues.apache.org/jira/browse/YARN-2756?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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zhihai xu reopened YARN-2756:
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> use static variable (Resources.none()) for not-running Node.resource in
> CommonNodeLabelsManager to save memory.
> ---------------------------------------------------------------------------------------------------------------
>
> Key: YARN-2756
> URL: https://issues.apache.org/jira/browse/YARN-2756
> Project: Hadoop YARN
> Issue Type: Improvement
> Reporter: zhihai xu
> Assignee: zhihai xu
> Priority: Minor
> Attachments: YARN-2756.000.patch
>
>
> use static variable (Resources.none()) for not-running Node.resource in
> CommonNodeLabelsManager to save memory. When a Node is not activated, the
> resource is never used, When a Node is activated, a new resource will be
> assigned to it in RMNodeLabelsManager#activateNode (nm.resource = resource)
> So it would be better to use static variable Resources.none() instead of
> allocating a new variable(Resource.newInstance(0, 0)) for each node
> deactivation.
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