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From "Anubhav Dhoot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2109) TestRM fails some tests when some tests run with CapacityScheduler and some with FairScheduler
Date Mon, 23 Jun 2014 05:46:25 GMT

    [ https://issues.apache.org/jira/browse/YARN-2109?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14040448#comment-14040448

Anubhav Dhoot commented on YARN-2109:

Hi [~airbots] did you get a fix working for this? I am not sure the issue is with testNMTokenSentForNormalContainer.
 I have a simple mitigation that seems to work in my testing. Let me know if you mind if take
this over and fix via the mitigation.

> 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: Chen He
>              Labels: test
> 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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