Jason Lowe created MAPREDUCE-4848:
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Summary: TaskAttemptContext cast error during AM recovery
Key: MAPREDUCE-4848
URL: https://issues.apache.org/jira/browse/MAPREDUCE-4848
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: mr-am
Affects Versions: 0.23.4
Reporter: Jason Lowe
Recently saw an AM that failed and tried to recover, but the subsequent attempt
quickly exited with its own failure during recovery:
{noformat}
2012-12-05 02:33:36,752 FATAL [AsyncDispatcher event handler]
org.apache.hadoop.yarn.event.AsyncDispatcher: Error in dispatcher thread
java.lang.ClassCastException:
org.apache.hadoop.mapreduce.task.TaskAttemptContextImpl cannot be cast to
org.apache.hadoop.mapred.TaskAttemptContext
at
org.apache.hadoop.mapred.OutputCommitter.recoverTask(OutputCommitter.java:284)
at
org.apache.hadoop.mapreduce.v2.app.recover.RecoveryService$InterceptingEventHandler.handle(RecoveryService.java:361)
at
org.apache.hadoop.mapreduce.v2.app.job.impl.TaskAttemptImpl$ContainerAssignedTransition.transition(TaskAttemptImpl.java:1211)
at
org.apache.hadoop.mapreduce.v2.app.job.impl.TaskAttemptImpl$ContainerAssignedTransition.transition(TaskAttemptImpl.java:1177)
at
org.apache.hadoop.yarn.state.StateMachineFactory$SingleInternalArc.doTransition(StateMachineFactory.java:357)
at
org.apache.hadoop.yarn.state.StateMachineFactory.doTransition(StateMachineFactory.java:298)
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:958)
at
org.apache.hadoop.mapreduce.v2.app.job.impl.TaskAttemptImpl.handle(TaskAttemptImpl.java:135)
at
org.apache.hadoop.mapreduce.v2.app.MRAppMaster$TaskAttemptEventDispatcher.handle(MRAppMaster.java:926)
at
org.apache.hadoop.mapreduce.v2.app.MRAppMaster$TaskAttemptEventDispatcher.handle(MRAppMaster.java:918)
at
org.apache.hadoop.yarn.event.AsyncDispatcher.dispatch(AsyncDispatcher.java:126)
at
org.apache.hadoop.mapreduce.v2.app.recover.RecoveryService$RecoveryDispatcher.realDispatch(RecoveryService.java:285)
at
org.apache.hadoop.mapreduce.v2.app.recover.RecoveryService$RecoveryDispatcher.dispatch(RecoveryService.java:281)
at
org.apache.hadoop.yarn.event.AsyncDispatcher$1.run(AsyncDispatcher.java:75)
at java.lang.Thread.run(Thread.java:619)
2012-12-05 02:33:36,752 INFO [AsyncDispatcher event handler]
org.apache.hadoop.yarn.event.AsyncDispatcher: Exiting, bbye..
{noformat}
The RM then launched a third AM attempt which succeeded. The third attempt saw
basically no progress after parsing the history file from the second attempt
and ran the job again from scratch.
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