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https://issues.apache.org/jira/browse/YARN-752?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13678418#comment-13678418
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Alejandro Abdelnur commented on YARN-752:
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Ah!, ok, so before this patch if I would do a request of only NODES allocations
would never happen. I think we should clearly document in the API that
specifying RACKS is only needed if you want an allocation in any node of that
RACK, if you want the allocation in a NODE you don't need to specify the rack
the node is.
> In AMRMClient, automatically add corresponding rack requests for requested
> nodes
> --------------------------------------------------------------------------------
>
> Key: YARN-752
> URL: https://issues.apache.org/jira/browse/YARN-752
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: api, applications
> Affects Versions: 2.0.4-alpha
> Reporter: Sandy Ryza
> Assignee: Sandy Ryza
> Attachments: YARN-752-1.patch, YARN-752-1.patch, YARN-752.patch
>
>
> A ContainerRequest that includes node-level requests must also include
> matching rack-level requests for the racks that those nodes are on. When a
> node is present without its rack, it makes sense for the client to
> automatically add the node's rack.
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