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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4784) TestRecovery occasionally fails
Date Sat, 10 Nov 2012 23:45:12 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4784?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13494803#comment-13494803
] 

Jason Lowe commented on MAPREDUCE-4784:
---------------------------------------

Looking at the test output when it fails, there's an invalid state transition:

{noformat}
2012-11-10 23:19:07,665 INFO  [AsyncDispatcher event handler] impl.TaskAttemptImpl (TaskAttemptImpl.java:handle(993))
- attempt_0_0000_m_000000_1 TaskAttempt Transitioned from NEW to UNASSIGNED
TaskAttempt State is : FAILED
TaskAttempt State is : STARTING Waiting for state : FAILED   progress : 0.0
2012-11-10 23:19:07,667 ERROR [AsyncDispatcher event handler] impl.TaskAttemptImpl (TaskAttemptImpl.java:handle(984))
- Can't handle this event at current state for attempt_0_0000_m_000000_1
org.apache.hadoop.yarn.state.InvalidStateTransitonException: Invalid event: TA_CONTAINER_LAUNCH_FAILED
at UNASSIGNED
        at org.apache.hadoop.yarn.state.StateMachineFactory.doTransition(StateMachineFactory.java:302)
        at org.apache.hadoop.yarn.state.StateMachineFactory.access$300(StateMachineFactory.java:43)
        at org.apache.hadoop.yarn.state.StateMachineFactory$InternalStateMachine.doTransition(StateMachineFactory.java:445)
        at org.apache.hadoop.mapreduce.v2.app.job.impl.TaskAttemptImpl.handle(TaskAttemptImpl.java:982)
        at org.apache.hadoop.mapreduce.v2.app.job.impl.TaskAttemptImpl.handle(TaskAttemptImpl.java:1)
        at org.apache.hadoop.mapreduce.v2.app.MRAppMaster$TaskAttemptEventDispatcher.handle(MRAppMaster.java:996)
        at org.apache.hadoop.mapreduce.v2.app.MRAppMaster$TaskAttemptEventDispatcher.handle(MRAppMaster.java:1)
        at org.apache.hadoop.yarn.event.AsyncDispatcher.dispatch(AsyncDispatcher.java:128)
        at org.apache.hadoop.yarn.event.AsyncDispatcher$1.run(AsyncDispatcher.java:77)
        at java.lang.Thread.run(Thread.java:662)
{noformat}

I think the problem occurs because the test is trying to inject TA_CONTAINER_LAUNCH_FAILED
into the attempt state machine asynchronously.  Sometimes that event arrives at the appropriate
state and the test passes, sometimes it arrives at an inappropriate state and the test fails.
                
> TestRecovery occasionally fails
> -------------------------------
>
>                 Key: MAPREDUCE-4784
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4784
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2, test
>    Affects Versions: 2.0.3-alpha
>            Reporter: Jason Lowe
>
> TestRecovery is occasionally failing with this error:
> {noformat}
> testCrashed(org.apache.hadoop.mapreduce.v2.app.TestRecovery): TaskAttempt state is not
correct (timedout) expected:<FAILED> but was:<STARTING>
> {noformat}

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