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https://issues.apache.org/jira/browse/YARN-5674?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16022404#comment-16022404
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loushang commented on YARN-5674:
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I wonder what the situation is now?
i came across this issue these days
> FairScheduler handles "dots" in user names inconsistently in the config
> -----------------------------------------------------------------------
>
> Key: YARN-5674
> URL: https://issues.apache.org/jira/browse/YARN-5674
> Project: Hadoop YARN
> Issue Type: Bug
> Components: fairscheduler
> Affects Versions: 2.6.0
> Reporter: Wilfred Spiegelenburg
> Assignee: Wilfred Spiegelenburg
>
> A user name can contain a dot because it could be used as the queue name we
> replace the dot with a defined separator. When defining queues in the
> configuration for users containing a dot we expect that the dot is replaced
> by the "\_dot\_" string.
> In the user limits we do not do that and user limits need a normal dot in the
> user name. This is confusing when you create a scheduler configuration in
> some places you need to replace in others you do not. This can cause issue
> when user limits are not enforced as expected.
> We should use one way to specify the user and since the queue naming can not
> be changed we should also use the same "\_dot\_" in the user limits and
> enforce correctly.
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