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https://issues.apache.org/jira/browse/MAPREDUCE-4637?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13448845#comment-13448845
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Tom White commented on MAPREDUCE-4637:
--------------------------------------
Here are the relevant lines from the AM's log when a task attempt
(attempt_1337372605417_0946_m_000095_0) was killed manually from the CLI:
{noformat}
2012-05-24 11:45:49,328 INFO [AsyncDispatcher event handler]
org.apache.hadoop.mapreduce.v2.app.job.impl.TaskAttemptImpl:
attempt_1337372605417_0946_m_000095_0 TaskAttempt Transitioned from NEW to
UNASSIGNED
2012-05-24 12:01:55,072 INFO [IPC Server handler 0 on 53369]
org.apache.hadoop.mapreduce.v2.app.client.MRClientService: Kill task attempt
received from client attempt_1337372605417_0946_m_000095_0
2012-05-24 12:01:55,073 ERROR [AsyncDispatcher event handler]
org.apache.hadoop.mapreduce.v2.app.job.impl.TaskAttemptImpl: Can't handle this
event at current state for attempt_1337372605417_0946_m_000095_0
org.apache.hadoop.yarn.state.InvalidStateTransitonException: Invalid event:
TA_DIAGNOSTICS_UPDATE at UNASSIGNED
at
org.apache.hadoop.yarn.state.StateMachineFactory.doTransition(StateMachineFactory.java:301)
at
org.apache.hadoop.yarn.state.StateMachineFactory.access$300(StateMachineFactory.java:43)
at
org.apache.hadoop.yarn.state.StateMachineFactory$InternalStateMachine.doTransition(StateMachineFactory.java:443)
at
org.apache.hadoop.mapreduce.v2.app.job.impl.TaskAttemptImpl.handle(TaskAttemptImpl.java:941)
at
org.apache.hadoop.mapreduce.v2.app.job.impl.TaskAttemptImpl.handle(TaskAttemptImpl.java:133)
at
org.apache.hadoop.mapreduce.v2.app.MRAppMaster$TaskAttemptEventDispatcher.handle(MRAppMaster.java:912)
at
org.apache.hadoop.mapreduce.v2.app.MRAppMaster$TaskAttemptEventDispatcher.handle(MRAppMaster.java:904)
at
org.apache.hadoop.yarn.event.AsyncDispatcher.dispatch(AsyncDispatcher.java:125)
at
org.apache.hadoop.yarn.event.AsyncDispatcher$1.run(AsyncDispatcher.java:74)
at java.lang.Thread.run(Thread.java:662)
2012-05-24 12:01:55,076 INFO [AsyncDispatcher event handler]
org.apache.hadoop.mapreduce.v2.app.job.impl.TaskAttemptImpl:
attempt_1337372605417_0946_m_000095_0 TaskAttempt Transitioned from UNASSIGNED
to KILLED
2012-05-24 12:01:55,078 INFO [AsyncDispatcher event handler]
org.apache.hadoop.mapreduce.v2.app.job.impl.JobImpl: job_1337372605417_0946Job
Transitioned from RUNNING to ERROR
2012-05-24 12:01:55,078 INFO [Thread-46]
org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator: Processing the
event EventType: CONTAINER_DEALLOCATE
{noformat}
The bugs seems to be in
MRClientService.MRClientProtocolHandler#killTaskAttempt() where the handler is
sent a TaskAttemptDiagnosticsUpdateEvent. However, in the UNASSIGNED state a
TaskAttempt cannot handle this event, so it fails with an error. The simplest
fix would be to allow a TaskAttemptDiagnosticsUpdateEvent in the UNASSIGNED
state. The same bug occurs with the fail task command.
This bug was found by Wing Yew Poon.
> Killing an unassigned task attempt causes the job to fail
> ---------------------------------------------------------
>
> Key: MAPREDUCE-4637
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4637
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 2.0.0-alpha
> Reporter: Tom White
>
> Attempting to kill a task attempt that has been scheduled but is not running
> causes an invalid state transition and the AM to stop with an error.
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