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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 updated YARN-2756:
----------------------------
    Issue Type: Sub-task  (was: Improvement)
        Parent: YARN-2492

> 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: Sub-task
>            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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