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https://issues.apache.org/jira/browse/YARN-2483?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14116455#comment-14116455
 ] 

Tsuyoshi OZAWA commented on YARN-2483:
--------------------------------------

Maybe the test failure is because of following line, but I don't have any good 
idea to avoid it for now...:
{code}
  private static final class AMContainerAllocatedTransition
      implements
      MultipleArcTransition<RMAppAttemptImpl, RMAppAttemptEvent, 
RMAppAttemptState> {
    @Override
    public RMAppAttemptState transition(RMAppAttemptImpl appAttempt,
        RMAppAttemptEvent event) {
     ...
     // Note that YarnScheduler#allocate is not guaranteed to be able to
      // fetch it since container may not be fetchable for some reason like
      // DNS unavailable causing container token not generated. As such, we
      // return to the previous state and keep retry until am container is
      // fetched.
      if (amContainerAllocation.getContainers().size() == 0) {
        appAttempt.retryFetchingAMContainer(appAttempt);
        return RMAppAttemptState.SCHEDULED;
      }
{code}

> TestAMRestart#testShouldNotCountFailureToMaxAttemptRetry fails due to 
> incorrect AppAttempt state
> ------------------------------------------------------------------------------------------------
>
>                 Key: YARN-2483
>                 URL: https://issues.apache.org/jira/browse/YARN-2483
>             Project: Hadoop YARN
>          Issue Type: Test
>            Reporter: Ted Yu
>
> From https://builds.apache.org/job/Hadoop-Yarn-trunk/665/console :
> {code}
> testShouldNotCountFailureToMaxAttemptRetry(org.apache.hadoop.yarn.server.resourcemanager.applicationsmanager.TestAMRestart)
>   Time elapsed: 49.686 sec  <<< FAILURE!
> java.lang.AssertionError: AppAttempt state is not correct (timedout) 
> expected:<ALLOCATED> but was:<SCHEDULED>
>       at org.junit.Assert.fail(Assert.java:88)
>       at org.junit.Assert.failNotEquals(Assert.java:743)
>       at org.junit.Assert.assertEquals(Assert.java:118)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.MockAM.waitForState(MockAM.java:84)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.MockRM.sendAMLaunched(MockRM.java:417)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.MockRM.launchAM(MockRM.java:582)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.MockRM.launchAndRegisterAM(MockRM.java:589)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.MockRM.waitForNewAMToLaunchAndRegister(MockRM.java:182)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.applicationsmanager.TestAMRestart.testShouldNotCountFailureToMaxAttemptRetry(TestAMRestart.java:402)
> {code}
> TestApplicationMasterLauncher#testallocateBeforeAMRegistration fails with 
> similar cause.
> These tests failed in build #664 as well.



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