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https://issues.apache.org/jira/browse/YARN-412?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13621709#comment-13621709
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Hitesh Shah commented on YARN-412:
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@Roger, for future reference ( may not be applicable to this jira ), it is good
to leave earlier patch attachments lying around and not delete them when
uploading newer patches. This can be used to trace review comments/feedback etc.
As for hadoop-common, mvn eclipse:eclipse, it can be ignored for now. It is a
known issue with an open jira that has not been addressed yet.
> FifoScheduler incorrectly checking for node locality
> ----------------------------------------------------
>
> Key: YARN-412
> URL: https://issues.apache.org/jira/browse/YARN-412
> Project: Hadoop YARN
> Issue Type: Bug
> Components: scheduler
> Reporter: Roger Hoover
> Assignee: Roger Hoover
> Priority: Minor
> Labels: patch
> Attachments: YARN-412.patch
>
>
> In the FifoScheduler, the assignNodeLocalContainers method is checking if the
> data is local to a node by searching for the nodeAddress of the node in the
> set of outstanding requests for the app. This seems to be incorrect as it
> should be checking hostname instead. The offending line of code is 455:
> application.getResourceRequest(priority, node.getRMNode().getNodeAddress());
> Requests are formated by hostname (e.g. host1.foo.com) whereas node addresses
> are a concatenation of hostname and command port (e.g. host1.foo.com:1234)
> In the CapacityScheduler, it's done using hostname. See
> LeafQueue.assignNodeLocalContainers, line 1129
> application.getResourceRequest(priority, node.getHostName());
> Note that this bug does not affect the actual scheduling decisions made by
> the FifoScheduler because even though it incorrect determines that a request
> is not local to the node, it will still schedule the request immediately
> because it's rack-local. However, this bug may be adversely affecting the
> reporting of job status by underreporting the number of tasks that were node
> local.
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