[MAPREDUCE-7107] NPE on MapReduce AM leaves the job in an inconsistent state

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.7.3
• Assignee: Unassigned
• Reporter: Gonzalo Herreros
• Created: 07/Jun/18 14:56
• Updated: 23/Oct/19 06:36

Description

On AWS, running a MapReduce job, one of the nodes died and was decommissioned.

However, the AM doesn't seem to handle that well and the job didn't complete mappers correctly from there.

2018-06-07 14:29:08,686 ERROR [RMCommunicator Allocator] org.apache.hadoop.mapreduce.v2.app.rm.RMCommunicator: ERROR IN CONTACTING RM. 
java.lang.NullPointerException
	at org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator.handleUpdatedNodes(RMContainerAllocator.java:879)
	at org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator.getResources(RMContainerAllocator.java:779)
	at org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator.heartbeat(RMContainerAllocator.java:259)
	at org.apache.hadoop.mapreduce.v2.app.rm.RMCommunicator$AllocatorRunnable.run(RMCommunicator.java:281)
	at java.lang.Thread.run(Thread.java:748)
2018-06-07 14:29:08,686 INFO [IPC Server handler 4 on 46577] org.apache.hadoop.mapred.TaskAttemptListenerImpl: MapCompletionEvents request from attempt_1528378746527_0011_r_000553_0. startIndex 13112 maxEvents 1453
2018-06-07 14:29:08,686 ERROR [AsyncDispatcher event handler] org.apache.hadoop.yarn.event.AsyncDispatcher: Error in dispatcher thread
java.lang.NullPointerException
	at org.apache.hadoop.mapreduce.v2.app.job.impl.JobImpl$UpdatedNodesTransition.transition(JobImpl.java:2162)
	at org.apache.hadoop.mapreduce.v2.app.job.impl.JobImpl$UpdatedNodesTransition.transition(JobImpl.java:2155)
	at org.apache.hadoop.yarn.state.StateMachineFactory$SingleInternalArc.doTransition(StateMachineFactory.java:362)
	at org.apache.hadoop.yarn.state.StateMachineFactory.doTransition(StateMachineFactory.java:302)
	at org.apache.hadoop.yarn.state.StateMachineFactory.access$300(StateMachineFactory.java:46)
	at org.apache.hadoop.yarn.state.StateMachineFactory$InternalStateMachine.doTransition(StateMachineFactory.java:448)
	at org.apache.hadoop.mapreduce.v2.app.job.impl.JobImpl.handle(JobImpl.java:997)
	at org.apache.hadoop.mapreduce.v2.app.job.impl.JobImpl.handle(JobImpl.java:139)
	at org.apache.hadoop.mapreduce.v2.app.MRAppMaster$JobEventDispatcher.handle(MRAppMaster.java:1346)
	at org.apache.hadoop.mapreduce.v2.app.MRAppMaster$JobEventDispatcher.handle(MRAppMaster.java:1342)
	at org.apache.hadoop.yarn.event.AsyncDispatcher.dispatch(AsyncDispatcher.java:184)
	at org.apache.hadoop.yarn.event.AsyncDispatcher$1.run(AsyncDispatcher.java:110)
	at java.lang.Thread.run(Thread.java:748)
2018-06-07 14:29:08,688 INFO [AsyncDispatcher ShutDown handler] org.apache.hadoop.yarn.event.AsyncDispatcher: Exiting, bbye..