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https://issues.apache.org/jira/browse/MAPREDUCE-4105?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13248926#comment-13248926
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Tom White commented on MAPREDUCE-4105:
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Running each test in a separate JVM solves the problem, so it's not an issue,
but in general I'd rather avoid the use of static state in a class like this.
The latest patch still has a change to DNSToSwitchMapping, which I think is
unnecessary.
> Yarn RackResolver ignores rack configurations
> ---------------------------------------------
>
> Key: MAPREDUCE-4105
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4105
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 0.23.1
> Reporter: Ahmed Radwan
> Assignee: Ahmed Radwan
> Fix For: 0.23.2
>
> Attachments: MAPREDUCE-4105.patch, MAPREDUCE-4105_rev2.patch
>
>
> Incorrect mappings because the Yarn RackResolver ignores rack configurations.
> This can be verified by inspecting the resource manager web ui that lists all
> the nodes, all of them show up with /default-rack regardless of the output
> from the script specified using net.topology.script.file.name configuration
> property.
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