Tsuyoshi OZAWA commented on YARN-2096:

One good news: TestRMRestart with Anubhav's patch works well - after running 
tests hundreds times, no failure. Good job :-)

> Race in TestRMRestart#testQueueMetricsOnRMRestart
> -------------------------------------------------
>                 Key: YARN-2096
>                 URL: https://issues.apache.org/jira/browse/YARN-2096
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Anubhav Dhoot
>            Assignee: Anubhav Dhoot
>             Fix For: 2.5.0
>         Attachments: YARN-2096.patch
> org.apache.hadoop.yarn.server.resourcemanager.TestRMRestart.testQueueMetricsOnRMRestart
>  fails randomly because of a race condition.
> The test validates that metrics are incremented, but does not wait for all 
> transitions to finish before checking for the values.
> It also resets metrics after kicking off recovery of second RM. The metrics 
> that need to be incremented race with this reset causing test to fail 
> randomly.
> We need to wait for the right transitions.

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