[jira] [Resolved] (FLINK-2587) FlinkKafkaConsumer may fail with a NPE

["Stephan Ewen (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-2587?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Stephan Ewen resolved FLINK-2587.
---------------------------------
       Resolution: Fixed
         Assignee: Stephan Ewen
    Fix Version/s: 0.10

Fixed via 74ed714534c832de4376f7acbd4896c7a93273de

> FlinkKafkaConsumer may fail with a NPE
> --------------------------------------
>
>                 Key: FLINK-2587
>                 URL: https://issues.apache.org/jira/browse/FLINK-2587
>             Project: Flink
>          Issue Type: Bug
>          Components: Kafka Connector
>    Affects Versions: 0.10
>            Reporter: Robert Metzger
>            Assignee: Stephan Ewen
>             Fix For: 0.10
>
>
> This travis run (https://api.travis-ci.org/jobs/77533759/log.txt?deansi=true) failed with the following exception: 
> {code}
> org.apache.flink.client.program.ProgramInvocationException: The program execution failed: Job execution failed.
> 	at org.apache.flink.client.program.Client.run(Client.java:438)
> 	at org.apache.flink.streaming.api.environment.RemoteStreamEnvironment.executeRemotely(RemoteStreamEnvironment.java:122)
> 	at org.apache.flink.streaming.api.environment.RemoteStreamEnvironment.execute(RemoteStreamEnvironment.java:96)
> 	at org.apache.flink.streaming.connectors.kafka.KafkaTestBase.tryExecute(KafkaTestBase.java:267)
> 	at org.apache.flink.streaming.connectors.kafka.KafkaConsumerTestBase.runBigRecordTestTopology(KafkaConsumerTestBase.java:821)
> 	at org.apache.flink.streaming.connectors.kafka.KafkaITCase.testBigRecordJob(KafkaITCase.java:98)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:606)
> 	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
> 	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> 	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
> 	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> 	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
> 	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
> 	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
> 	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
> 	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
> 	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
> 	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
> 	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
> 	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
> 	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
> 	at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
> 	at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:264)
> 	at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:153)
> 	at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:124)
> 	at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:200)
> 	at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:153)
> 	at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:103)
> Caused by: org.apache.flink.runtime.client.JobExecutionException: Job execution failed.
> 	at org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1.applyOrElse(JobManager.scala:362)
> 	at scala.runtime.AbstractPartialFunction$mcVL$sp.apply$mcVL$sp(AbstractPartialFunction.scala:33)
> 	at scala.runtime.AbstractPartialFunction$mcVL$sp.apply(AbstractPartialFunction.scala:33)
> 	at scala.runtime.AbstractPartialFunction$mcVL$sp.apply(AbstractPartialFunction.scala:25)
> 	at org.apache.flink.runtime.testingUtils.TestingJobManager$$anonfun$handleTestingMessage$1.applyOrElse(TestingJobManager.scala:260)
> 	at scala.PartialFunction$OrElse.apply(PartialFunction.scala:162)
> 	at org.apache.flink.runtime.LeaderSessionMessages$$anonfun$receive$1.applyOrElse(LeaderSessionMessages.scala:40)
> 	at scala.runtime.AbstractPartialFunction$mcVL$sp.apply$mcVL$sp(AbstractPartialFunction.scala:33)
> 	at scala.runtime.AbstractPartialFunction$mcVL$sp.apply(AbstractPartialFunction.scala:33)
> 	at scala.runtime.AbstractPartialFunction$mcVL$sp.apply(AbstractPartialFunction.scala:25)
> 	at org.apache.flink.runtime.LogMessages$$anon$1.apply(LogMessages.scala:33)
> 	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:99)
> 	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$WorkQueue.pollAndExecAll(ForkJoinPool.java:1253)
> 	at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1346)
> 	at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
> 	at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
> Caused by: java.lang.RuntimeException: Error while confirming checkpoint
> 	at org.apache.flink.runtime.taskmanager.Task$2.run(Task.java:931)
> 	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
> 	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> 	at java.lang.Thread.run(Thread.java:745)
> Caused by: java.lang.Exception: Error while confirming checkpoint 77 to the stream function
> 	at org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.notifyCheckpointComplete(AbstractUdfStreamOperator.java:146)
> 	at org.apache.flink.streaming.runtime.tasks.StreamTask.notifyCheckpointComplete(StreamTask.java:338)
> 	at org.apache.flink.runtime.taskmanager.Task$2.run(Task.java:927)
> 	... 5 more
> Caused by: java.lang.NullPointerException
> 	at org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer.notifyCheckpointComplete(FlinkKafkaConsumer.java:541)
> 	at org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.notifyCheckpointComplete(AbstractUdfStreamOperator.java:144)
> 	... 7 more
> {code}
> It is caused by a rare race condition when one thread is in the close() method and another thread is notifying for a complete checkpoint.



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