[TEZ-2855] Potential NPE while routing VertexManager events

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 0.5.0
• Fix Version/s: 0.7.1, 0.6.3, 0.8.1-alpha
• Target Version/s: 0.6.3
• Assignee: Siddharth Seth
• Reporter: Siddharth Seth
• Created: 24/Sep/15 19:52
• Updated: 12/Oct/15 20:46
• Resolved: 01/Oct/15 00:10

Description

Observed while running against 0.8.0-alpha. This will likely affect 0.7 as well - that'll be known after debugging.

2015-09-24T12:13:42,675 ERROR [Dispatcher thread: Central] common.AsyncDispatcher: Error in dispatcher thread
java.lang.NullPointerException
  at org.apache.tez.dag.app.dag.impl.VertexImpl.handleRoutedTezEvents(VertexImpl.java:4429) ~[TezAppJar.jar:0.8.0-alpha]
  at org.apache.tez.dag.app.dag.impl.VertexImpl.access$4000(VertexImpl.java:203) ~[TezAppJar.jar:0.8.0-alpha]
  at org.apache.tez.dag.app.dag.impl.VertexImpl$RouteEventTransition.transition(VertexImpl.java:4175) ~[TezAppJar.jar:0.8.0-alpha]
  at org.apache.tez.dag.app.dag.impl.VertexImpl$RouteEventTransition.transition(VertexImpl.java:4167) ~[TezAppJar.jar:0.8.0-alpha]
  at org.apache.hadoop.yarn.state.StateMachineFactory$MultipleInternalArc.doTransition(StateMachineFactory.java:385) ~[hadoop-yarn-common-2.6.0.jar:?]
  at org.apache.hadoop.yarn.state.StateMachineFactory.doTransition(StateMachineFactory.java:302) ~[hadoop-yarn-common-2.6.0.jar:?]
  at org.apache.hadoop.yarn.state.StateMachineFactory.access$300(StateMachineFactory.java:46) ~[hadoop-yarn-common-2.6.0.jar:?]
  at org.apache.hadoop.yarn.state.StateMachineFactory$InternalStateMachine.doTransition(StateMachineFactory.java:448) ~[hadoop-yarn-common-2.6.0.jar:?]
  at org.apache.tez.state.StateMachineTez.doTransition(StateMachineTez.java:57) ~[TezAppJar.jar:0.8.0-alpha]
  at org.apache.tez.dag.app.dag.impl.VertexImpl.handle(VertexImpl.java:1906) ~[TezAppJar.jar:0.8.0-alpha]
  at org.apache.tez.dag.app.dag.impl.VertexImpl.handle(VertexImpl.java:202) ~[TezAppJar.jar:0.8.0-alpha]
  at org.apache.tez.dag.app.DAGAppMaster$VertexEventDispatcher.handle(DAGAppMaster.java:2069) ~[TezAppJar.jar:0.8.0-alpha]
  at org.apache.tez.dag.app.DAGAppMaster$VertexEventDispatcher.handle(DAGAppMaster.java:2055) ~[TezAppJar.jar:0.8.0-alpha]
  at org.apache.tez.common.AsyncDispatcher.dispatch(AsyncDispatcher.java:183) [tez-common-0.8.0-alpha.jar:0.8.0-alpha]
  at org.apache.tez.common.AsyncDispatcher$1.run(AsyncDispatcher.java:114) [tez-common-0.8.0-alpha.jar:0.8.0-alpha]
  at java.lang.Thread.run(Thread.java:745) [?:1.8.0_40]
2015-09-24T12:13:42,681 INFO [HistoryEventHandlingThread] impl.SimpleHistoryLoggingService: Writing event TASK_ATTEMPT_FINISHED to history file

Looks like the VertexManager was null.