Arun Suresh updated YARN-4270:
    Attachment: YARN-4270.3.patch

Previous test case failure was spurious.

Updating Patch anyway:
# Added one more testcase to verify behavior for rack local reservations
# Fixed checkstyle warnings

[~kasha], do you want to give it a quick rev ?

> Limit application resource reservation on nodes for non-node/rack specific 
> requests
> -----------------------------------------------------------------------------------
>                 Key: YARN-4270
>                 URL: https://issues.apache.org/jira/browse/YARN-4270
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: fairscheduler
>            Reporter: Arun Suresh
>            Assignee: Arun Suresh
>         Attachments: YARN-4270.1.patch, YARN-4270.2.patch, YARN-4270.3.patch
> I has been noticed that for off-switch requests, the FairScheduler reserves 
> resources on all nodes. This could lead to the entire cluster being 
> unavailable for all other applications.
> Ideally, the reservations should be on a configurable number of nodes, 
> default 1.

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