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https://issues.apache.org/jira/browse/TEZ-2421?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14533904#comment-14533904
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Jeff Zhang commented on TEZ-2421:
---------------------------------
It cause the TestAMRecovery fail.
{code}
2015-05-08 13:35:25,672 INFO [Dispatcher thread: Central] impl.VertexImpl:
Source task attempt completed for vertex: vertex_1431063298340_0001_1_01 [v2]
attempt: attempt_1431063298340_0001_1_00_000000_0 with state: SUCCEEDED
vertexState: RUNNING
2015-05-08 13:35:25,672 ERROR [Dispatcher thread: Central]
common.AsyncDispatcher: Error in dispatcher thread
java.lang.NullPointerException
at
org.apache.tez.dag.app.dag.impl.TaskAttemptImpl.createRemoteTaskSpec(TaskAttemptImpl.java:461)
at
org.apache.tez.dag.app.dag.impl.TaskAttemptImpl$ScheduleTaskattemptTransition.transition(TaskAttemptImpl.java:1012)
at
org.apache.tez.dag.app.dag.impl.TaskAttemptImpl$ScheduleTaskattemptTransition.transition(TaskAttemptImpl.java:1)
at
org.apache.hadoop.yarn.state.StateMachineFactory$MultipleInternalArc.doTransition(StateMachineFactory.java:385)
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.tez.dag.app.dag.impl.TaskAttemptImpl.handle(TaskAttemptImpl.java:673)
at
org.apache.tez.dag.app.dag.impl.TaskAttemptImpl.handle(TaskAttemptImpl.java:1)
at
org.apache.tez.dag.app.DAGAppMaster$TaskAttemptEventDispatcher.handle(DAGAppMaster.java:1920)
at
org.apache.tez.dag.app.DAGAppMaster$TaskAttemptEventDispatcher.handle(DAGAppMaster.java:1)
at
org.apache.tez.common.AsyncDispatcher.dispatch(AsyncDispatcher.java:183)
at org.apache.tez.common.AsyncDispatcher$1.run(AsyncDispatcher.java:114)
at java.lang.Thread.run(Thread.java:745)
{code}
> Deadlock in AM because attempt and vertex locking each other out
> ----------------------------------------------------------------
>
> Key: TEZ-2421
> URL: https://issues.apache.org/jira/browse/TEZ-2421
> Project: Apache Tez
> Issue Type: Bug
> Reporter: Bikas Saha
> Assignee: Bikas Saha
> Priority: Blocker
> Attachments: TEZ-2421.1.patch, TEZ-2421.2.patch, TEZ-2421.3.patch
>
>
> Ideally locks should be taken one way - either going down or up. Preferably
> not going up because most such data can be passed in during object
> construction.
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