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https://issues.apache.org/jira/browse/YARN-752?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13678578#comment-13678578
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Alejandro Abdelnur commented on YARN-752:
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bq. I think if the user gives a wrong rack, we should throw an error.
Per previous discussion this does not happen (except if you are referring to an
invalid rack altogether). If a ContainerRequest has host1 and rack3, it means
that the containers are desired either in the host1 or rack3. it does not mean
that host1 is in rack3.
> 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-752-2.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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