Its likely that its hitting an NPE on this line of code Task targetTask = vertex.getTask(riEvent.getTargetIndex()); targetTask.registerTezEvent(tezEvent); <<<<<<<<<<<< this line
So the error could be that you are generating X splits but less then X tasks. So at some point there is a split event for a non-existent task. Are you using any custom input initializer (or vertex manager)? Bikas -----Original Message----- From: Kostas Tzoumas [mailto:[email protected]] Sent: Thursday, January 08, 2015 1:41 PM To: [email protected] Subject: Problem with large job on Flink-on-Tez application Hi folks, I am running a SQL-like query (similar to TPC-H Q3) on a prototype of Flink-on-Tez. I am using the latest Tez master. It runs fine on smaller scales (e.g., TPC-H scale 500), and I am getting the following error at scale 1250: 15/01/08 22:07:42 INFO client.DAGClientImpl: DAG initialized: CurrentState=Running 15/01/08 22:07:43 INFO client.DAGClientImpl: DAG: State: RUNNING Progress: 0% TotalTasks: 12092 Succeeded: 0 Running: 0 Failed: 0 Killed: 0 15/01/08 22:07:47 INFO client.DAGClientImpl: DAG: State: FAILED Progress: 0% TotalTasks: 12092 Succeeded: 0 Running: 0 Failed: 0 Killed: 1246 15/01/08 22:07:47 INFO client.DAGClientImpl: DAG completed. FinalState=FAILED 15/01/08 22:07:47 ERROR client.TezExecutor: Flink Java Job at Thu Jan 08 22:07:33 CET 2015 failed with diagnostics: [Vertex failed, vertexName=DataSource (at getCustomerDataSet(TPCHQuery3.java:217) (org.apache.flink.api.java.io.CsvInputFormat))032ae46b-6bb9-4dcf-91c4-7e49b49f6546, vertexId=vertex_1420727594991_0021_1_01, diagnostics=[Exception in VertexManager, vertex=vertex_1420727594991_0021_1_01 [DataSource (at getCustomerDataSet(TPCHQuery3.java:217) (org.apache.flink.api.java.io.CsvInputFormat))032ae46b-6bb9-4dcf-91c4-7e49b49f6546],java.lang.NullPointerException at org.apache.tez.dag.app.dag.impl.VertexImpl.handleRoutedTezEvents(VertexImpl.java:3857) at org.apache.tez.dag.app.dag.impl.VertexImpl.scheduleTasks(VertexImpl.java:1265) at org.apache.tez.dag.app.dag.impl.VertexManager$VertexManagerPluginContextImpl.scheduleVertexTasks(VertexManager.java:144) at org.apache.tez.dag.app.dag.impl.ImmediateStartVertexManager.scheduleTasks(ImmediateStartVertexManager.java:100) at org.apache.tez.dag.app.dag.impl.ImmediateStartVertexManager.onVertexStarted(ImmediateStartVertexManager.java:75) at org.apache.tez.dag.app.dag.impl.VertexManager.onVertexStarted(VertexManager.java:365) at org.apache.tez.dag.app.dag.impl.VertexImpl.startVertex(VertexImpl.java:3320) at org.apache.tez.dag.app.dag.impl.VertexImpl.access$5100(VertexImpl.java:183) at org.apache.tez.dag.app.dag.impl.VertexImpl$StartTransition.transition(VertexImpl.java:3293) at org.apache.tez.dag.app.dag.impl.VertexImpl$StartTransition.transition(VertexImpl.java:3285) at org.apache.hadoop.yarn.state.StateMachineFactory$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.state.StateMachineTez.doTransition(StateMachineTez.java:57) at org.apache.tez.dag.app.dag.impl.VertexImpl.handle(VertexImpl.java:1587) at org.apache.tez.dag.app.dag.impl.VertexImpl.handle(VertexImpl.java:182) at org.apache.tez.dag.app.DAGAppMaster$VertexEventDispatcher.handle(DAGAppMaster.java:1763) at org.apache.tez.dag.app.DAGAppMaster$VertexEventDispatcher.handle(DAGAppMaster.java:1749) at org.apache.tez.common.AsyncDispatcher.dispatch(AsyncDispatcher.java:184) at org.apache.tez.common.AsyncDispatcher$1.run(AsyncDispatcher.java:116) at java.lang.Thread.run(Thread.java:745) It may well be that this is a problem on the Flink side of things (albeit not visible in the stack trace), I was just wondering if the error rings a bell. Since I am creating an input task per input split, this job results in quite a few of input tasks. The logs contain one more exception [1] caused by the exception above. Best, Kostas [1] 2015-01-08 22:07:44,448 ERROR [Dispatcher thread: Central] impl.VertexImpl: Exception in VertexManager, vertex=vertex_1420727594991_0021_1_01 [DataSource (at getCustomerDataSet(TPCHQuery3.java:217) (org.apache.flink.api.java.io.CsvInputFormat))032ae46b-6bb9-4dcf-91c4-7e49b49f6546] org.apache.tez.dag.app.dag.impl.AMUserCodeException: java.lang.NullPointerException at org.apache.tez.dag.app.dag.impl.VertexManager.onVertexStarted(VertexManager.java:368) at org.apache.tez.dag.app.dag.impl.VertexImpl.startVertex(VertexImpl.java:3320) at org.apache.tez.dag.app.dag.impl.VertexImpl.access$5100(VertexImpl.java:183) at org.apache.tez.dag.app.dag.impl.VertexImpl$StartTransition.transition(VertexImpl.java:3293) at org.apache.tez.dag.app.dag.impl.VertexImpl$StartTransition.transition(VertexImpl.java:3285) at org.apache.hadoop.yarn.state.StateMachineFactory$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.state.StateMachineTez.doTransition(StateMachineTez.java:57) at org.apache.tez.dag.app.dag.impl.VertexImpl.handle(VertexImpl.java:1587) at org.apache.tez.dag.app.dag.impl.VertexImpl.handle(VertexImpl.java:182) at org.apache.tez.dag.app.DAGAppMaster$VertexEventDispatcher.handle(DAGAppMaster.java:1763) at org.apache.tez.dag.app.DAGAppMaster$VertexEventDispatcher.handle(DAGAppMaster.java:1749) at org.apache.tez.common.AsyncDispatcher.dispatch(AsyncDispatcher.java:184) at org.apache.tez.common.AsyncDispatcher$1.run(AsyncDispatcher.java:116) at java.lang.Thread.run(Thread.java:745) Caused by: java.lang.NullPointerException at org.apache.tez.dag.app.dag.impl.VertexImpl.handleRoutedTezEvents(VertexImpl.java:3857) at org.apache.tez.dag.app.dag.impl.VertexImpl.scheduleTasks(VertexImpl.java:1265) at org.apache.tez.dag.app.dag.impl.VertexManager$VertexManagerPluginContextImpl.scheduleVertexTasks(VertexManager.java:144) at org.apache.tez.dag.app.dag.impl.ImmediateStartVertexManager.scheduleTasks(ImmediateStartVertexManager.java:100) at org.apache.tez.dag.app.dag.impl.ImmediateStartVertexManager.onVertexStarted(ImmediateStartVertexManager.java:75) at org.apache.tez.dag.app.dag.impl.VertexManager.onVertexStarted(VertexManager.java:365) ... 16 more -- CONFIDENTIALITY NOTICE NOTICE: This message is intended for the use of the individual or entity to which it is addressed and may contain information that is confidential, privileged and exempt from disclosure under applicable law. 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