[FLINK-2659] Object reuse in UnionWithTempOperator

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.10.0
• Fix Version/s: 0.9, 0.10.0
• Component/s: Runtime / Coordination
• Assignee: Greg Hogan
• Reporter: Greg Hogan
• Created: 11/Sep/15 13:57
• Updated: 06/Oct/15 15:51
• Resolved: 17/Sep/15 13:47

Description

The first loop in UnionWithTempOperator.run() executes until null, then the second loop attempts to reuse this null value. StephanEwen, would you like me to submit a pull request?

Stack trace:

org.apache.flink.client.program.ProgramInvocationException: The program execution failed: Job execution failed.
	at org.apache.flink.client.program.Client.run(Client.java:381)
	at org.apache.flink.client.program.Client.run(Client.java:319)
	at org.apache.flink.client.program.Client.run(Client.java:312)
	at org.apache.flink.client.program.ContextEnvironment.execute(ContextEnvironment.java:63)
	at org.apache.flink.api.java.ExecutionEnvironment.execute(ExecutionEnvironment.java:790)
	at Driver.main(Driver.java:376)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:437)
	at org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:353)
	at org.apache.flink.client.program.Client.run(Client.java:278)
	at org.apache.flink.client.CliFrontend.executeProgram(CliFrontend.java:630)
	at org.apache.flink.client.CliFrontend.run(CliFrontend.java:318)
	at org.apache.flink.client.CliFrontend.parseParameters(CliFrontend.java:953)
	at org.apache.flink.client.CliFrontend.main(CliFrontend.java:1003)
Caused by: org.apache.flink.runtime.client.JobExecutionException: Job execution failed.
	at org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1.applyOrElse(JobManager.scala:418)
	at scala.runtime.AbstractPartialFunction$mcVL$sp.apply$mcVL$sp(AbstractPartialFunction.scala:33)
	at scala.runtime.AbstractPartialFunction$mcVL$sp.apply(AbstractPartialFunction.scala:33)
	at scala.runtime.AbstractPartialFunction$mcVL$sp.apply(AbstractPartialFunction.scala:25)
	at org.apache.flink.runtime.LeaderSessionMessageFilter$$anonfun$receive$1.applyOrElse(LeaderSessionMessageFilter.scala:36)
	at scala.runtime.AbstractPartialFunction$mcVL$sp.apply$mcVL$sp(AbstractPartialFunction.scala:33)
	at scala.runtime.AbstractPartialFunction$mcVL$sp.apply(AbstractPartialFunction.scala:33)
	at scala.runtime.AbstractPartialFunction$mcVL$sp.apply(AbstractPartialFunction.scala:25)
	at org.apache.flink.runtime.LogMessages$$anon$1.apply(LogMessages.scala:40)
	at org.apache.flink.runtime.LogMessages$$anon$1.apply(LogMessages.scala:28)
	at scala.PartialFunction$class.applyOrElse(PartialFunction.scala:118)
	at org.apache.flink.runtime.LogMessages$$anon$1.applyOrElse(LogMessages.scala:28)
	at akka.actor.Actor$class.aroundReceive(Actor.scala:465)
	at org.apache.flink.runtime.jobmanager.JobManager.aroundReceive(JobManager.scala:104)
	at akka.actor.ActorCell.receiveMessage(ActorCell.scala:516)
	at akka.actor.ActorCell.invoke(ActorCell.scala:487)
	at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:254)
	at akka.dispatch.Mailbox.run(Mailbox.scala:221)
	at akka.dispatch.Mailbox.exec(Mailbox.scala:231)
	at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
	at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
	at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
	at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
Caused by: java.lang.NullPointerException
	at org.apache.flink.api.java.typeutils.runtime.TupleSerializer.deserialize(TupleSerializer.java:136)
	at org.apache.flink.api.java.typeutils.runtime.TupleSerializer.deserialize(TupleSerializer.java:30)
	at org.apache.flink.runtime.plugable.ReusingDeserializationDelegate.read(ReusingDeserializationDelegate.java:57)
	at org.apache.flink.runtime.io.network.api.serialization.SpillingAdaptiveSpanningRecordDeserializer.getNextRecord(SpillingAdaptiveSpanningRecordDeserializer.java:125)
	at org.apache.flink.runtime.io.network.api.reader.AbstractRecordReader.getNextRecord(AbstractRecordReader.java:65)
	at org.apache.flink.runtime.io.network.api.reader.MutableRecordReader.next(MutableRecordReader.java:34)
	at org.apache.flink.runtime.operators.util.ReaderIterator.next(ReaderIterator.java:59)
	at org.apache.flink.runtime.operators.resettable.SpillingResettableMutableObjectIterator.next(SpillingResettableMutableObjectIterator.java:149)
	at org.apache.flink.runtime.operators.UnionWithTempOperator.run(UnionWithTempOperator.java:71)
	at org.apache.flink.runtime.operators.RegularPactTask.run(RegularPactTask.java:489)
	at org.apache.flink.runtime.iterative.task.AbstractIterativePactTask.run(AbstractIterativePactTask.java:144)
	at org.apache.flink.runtime.iterative.task.IterationIntermediatePactTask.run(IterationIntermediatePactTask.java:92)
	at org.apache.flink.runtime.operators.RegularPactTask.invoke(RegularPactTask.java:354)
	at org.apache.flink.runtime.taskmanager.Task.run(Task.java:581)
	at java.lang.Thread.run(Thread.java:745)