Arun Suresh updated YARN-3676:
    Attachment: YARN-3676.1.patch

Attaching initial patch to validate approach.. will include test-case shortly

> Disregard 'assignMultiple' directive while scheduling apps with NODE_LOCAL 
> resource requests
> --------------------------------------------------------------------------------------------
>                 Key: YARN-3676
>                 URL: https://issues.apache.org/jira/browse/YARN-3676
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: fairscheduler
>            Reporter: Arun Suresh
>            Assignee: Arun Suresh
>         Attachments: YARN-3676.1.patch
> AssignMultiple is generally set to false to prevent overloading a Node (for 
> eg, new NMs that have just joined)
> A possible scheduling optimization would be to disregard this directive for 
> apps whose allowed locality is NODE_LOCAL

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