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https://issues.apache.org/jira/browse/YARN-339?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jian He updated YARN-339:
-------------------------

    Attachment: YARN-339.patch
    
> TestResourceTrackerService is failing intermittently
> ----------------------------------------------------
>
>                 Key: YARN-339
>                 URL: https://issues.apache.org/jira/browse/YARN-339
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 3.0.0, 0.23.5
>            Reporter: Ravi Prakash
>            Assignee: Jian He
>         Attachments: YARN-339.patch
>
>
> The test after testReconnectNode() is failing usually. This might be a race 
> condition in Metrics2 code. 
> Tests run: 8, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 3.127 sec <<< 
> FAILURE!
> testDecommissionWithIncludeHosts(org.apache.hadoop.yarn.server.resourcemanager.TestResourceTrackerService)
>   Time elapsed: 55 sec  <<< ERROR!
> org.apache.hadoop.metrics2.MetricsException: Metrics source ClusterMetrics 
> already exists!
>       at 
> org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.newSourceName(DefaultMetricsSystem.java:134)
>       at 
> org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.sourceName(DefaultMetricsSystem.java:115)
>       at 
> org.apache.hadoop.metrics2.impl.MetricsSystemImpl.register(MetricsSystemImpl.java:217)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.ClusterMetrics.registerMetrics(ClusterMetrics.java:71)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.ClusterMetrics.getMetrics(ClusterMetrics.java:58)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.TestResourceTrackerService.testDecommissionWithIncludeHosts(TestResourceTrackerService.java:74)

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