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https://issues.apache.org/jira/browse/YARN-5272?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15376276#comment-15376276
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Ray Chiang commented on YARN-5272:
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[~wilfreds], let me know if you'd prefer to abstract out the whitespace
trimming in a follow up JIRA or if you plan to do it for this patch.
> Handle queue names consistently in FairScheduler
> ------------------------------------------------
>
> Key: YARN-5272
> URL: https://issues.apache.org/jira/browse/YARN-5272
> Project: Hadoop YARN
> Issue Type: Bug
> Components: fairscheduler
> Affects Versions: 2.8.0
> Reporter: Wilfred Spiegelenburg
> Assignee: Wilfred Spiegelenburg
> Attachments: YARN-5272.1.patch, YARN-5272.3.patch, YARN-5272.4.patch
>
>
> The fix used in YARN-3214 uses a the JDK trim() method to remove leading and
> trailing spaces. The QueueMetrics uses a guava based trim when it splits the
> queues.
> The guava based trim uses the unicode definition of a white space which is
> different than the java trim as can be seen
> [here|https://docs.google.com/a/cloudera.com/spreadsheets/d/1kq4ECwPjHX9B8QUCTPclgsDCXYaj7T-FlT4tB5q3ahk/pub]
> A queue name with a non-breaking white space will thus still cause the same
> "Metrics source XXX already exists!" MetricsException.
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