[MAPREDUCE-4848] TaskAttemptContext cast error during AM recovery

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.23.4
• Fix Version/s: 2.0.3-alpha, 0.23.6
• Component/s: mr-am
• Hadoop Flags: Reviewed
• Assignee: Haifeng Chen
• Reporter: Jason Darrell Lowe
• Created: 05/Dec/12 04:01
• Updated: 15/Feb/13 13:10
• Resolved: 09/Jan/13 23:06

Description

Recently saw an AM that failed and tried to recover, but the subsequent attempt quickly exited with its own failure during recovery:

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..

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.