Hadoop QA commented on YARN-2109:

{color:green}+1 overall{color}.  Here are the results of testing the latest 
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author 

    {color:green}+1 tests included{color}.  The patch appears to include 1 new 
or modified test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the 
total number of javac compiler warnings.

    {color:green}+1 javadoc{color}.  There were no new javadoc warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with 

    {color:green}+1 findbugs{color}.  The patch does not introduce any new 
Findbugs (version 1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase 
the total number of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in 

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: 
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/4049//console

This message is automatically generated.

> TestRM fails some tests when some tests run with CapacityScheduler and some 
> with FairScheduler
> ----------------------------------------------------------------------------------------------
>                 Key: YARN-2109
>                 URL: https://issues.apache.org/jira/browse/YARN-2109
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: scheduler
>            Reporter: Anubhav Dhoot
>            Assignee: Anubhav Dhoot
>              Labels: test
>         Attachments: YARN-2109.001.patch, YARN-2109.001.patch
> testNMTokenSentForNormalContainer requires CapacityScheduler and was fixed in 
> [YARN-1846|https://issues.apache.org/jira/browse/YARN-1846] to explicitly set 
> it to be CapacityScheduler. But if the default scheduler is set to 
> FairScheduler then the rest of the tests that execute after this will fail 
> with invalid cast exceptions when getting queuemetrics. This is based on test 
> execution order as only the tests that execute after this test will fail. 
> This is because the queuemetrics will be initialized by this test to 
> QueueMetrics and shared by the subsequent tests. 
> We can explicitly clear the metrics at the end of this test to fix this.
> For example
> java.lang.ClassCastException: 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.QueueMetrics cannot 
> be cast to 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FSQueueMetrics
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FSQueueMetrics.forQueue(FSQueueMetrics.java:103)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.reinitialize(FairScheduler.java:1275)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$RMActiveServices.serviceInit(ResourceManager.java:418)
>       at 
> org.apache.hadoop.service.AbstractService.init(AbstractService.java:163)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.createAndInitActiveServices(ResourceManager.java:808)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.serviceInit(ResourceManager.java:230)
>       at 
> org.apache.hadoop.service.AbstractService.init(AbstractService.java:163)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.MockRM.<init>(MockRM.java:90)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.MockRM.<init>(MockRM.java:85)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.MockRM.<init>(MockRM.java:81)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.TestRM.testNMToken(TestRM.java:232)

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