Robert Metzger created FLINK-2587: ------------------------------------- Summary: 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
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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)