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https://issues.apache.org/jira/browse/FLINK-20412?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17309440#comment-17309440
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Till Rohrmann edited comment on FLINK-20412 at 3/26/21, 5:34 PM:
-----------------------------------------------------------------
I will decrease the priority of this ticket since [~TsReaper] is not responding
and we did not hear a lot of complaints.
was (Author: till.rohrmann):
I will decrease the priority of this ticket since [~TsReaper] is not responding
and we did not hear a lot of complains.
> Collect Result Fetching occasionally fails after a JobManager Failover
> ----------------------------------------------------------------------
>
> Key: FLINK-20412
> URL: https://issues.apache.org/jira/browse/FLINK-20412
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Coordination
> Affects Versions: 1.11.2, 1.12.0
> Reporter: Stephan Ewen
> Priority: Major
> Fix For: 1.11.4, 1.13.0
>
>
> The encountered exception is as blow.
>
> The issue can be reproduced by running a test with JobManager failover in a
> tight loop, for example the FileTextLinesITCase from this PR:
> [https://github.com/apache/flink/pull/14199]
>
> {code:java}
> 15335 [main] WARN
> org.apache.flink.streaming.api.operators.collect.CollectResultFetcher - An
> exception occurs when fetching query results
> java.util.concurrent.ExecutionException: java.lang.NullPointerException
> at
> java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:395)
> ~[?:?]
> at
> java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1999) ~[?:?]
> at
> org.apache.flink.streaming.api.operators.collect.CollectResultFetcher.sendRequest(CollectResultFetcher.java:163)
> ~[classes/:?]
> at
> org.apache.flink.streaming.api.operators.collect.CollectResultFetcher.next(CollectResultFetcher.java:134)
> [classes/:?]
> at
> org.apache.flink.streaming.api.operators.collect.CollectResultIterator.nextResultFromFetcher(CollectResultIterator.java:103)
> [classes/:?]
> at
> org.apache.flink.streaming.api.operators.collect.CollectResultIterator.hasNext(CollectResultIterator.java:77)
> [classes/:?]
> at
> org.apache.flink.streaming.api.datastream.DataStreamUtils.collectRecordsFromUnboundedStream(DataStreamUtils.java:142)
> [classes/:?]
> at
> org.apache.flink.connector.file.src.FileSourceTextLinesITCase.testContinuousTextFileSource(FileSourceTextLinesITCase.java:272)
> [test-classes/:?]
> at
> org.apache.flink.connector.file.src.FileSourceTextLinesITCase.testContinuousTextFileSourceWithJobManagerFailover(FileSourceTextLinesITCase.java:228)
> [test-classes/:?]
> at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> ~[?:?]
> at
> jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> ~[?:?]
> at
> jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> ~[?:?]
> at java.lang.reflect.Method.invoke(Method.java:566) ~[?:?]
> at
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
> [junit-4.12.jar:4.12]
> at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> [junit-4.12.jar:4.12]
> at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
> [junit-4.12.jar:4.12]
> at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> [junit-4.12.jar:4.12]
> at
> org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
> [junit-4.12.jar:4.12]
> at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
> [junit-4.12.jar:4.12]
> at org.junit.rules.RunRules.evaluate(RunRules.java:20)
> [junit-4.12.jar:4.12]
> at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
> [junit-4.12.jar:4.12]
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
> [junit-4.12.jar:4.12]
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
> [junit-4.12.jar:4.12]
> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
> [junit-4.12.jar:4.12]
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
> [junit-4.12.jar:4.12]
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
> [junit-4.12.jar:4.12]
> at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
> [junit-4.12.jar:4.12]
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
> [junit-4.12.jar:4.12]
> at
> org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
> [junit-4.12.jar:4.12]
> at
> org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
> [junit-4.12.jar:4.12]
> at
> org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
> [junit-4.12.jar:4.12]
> at org.junit.rules.RunRules.evaluate(RunRules.java:20)
> [junit-4.12.jar:4.12]
> at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
> [junit-4.12.jar:4.12]
> at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
> [junit-4.12.jar:4.12]
> at
> com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
> [junit-rt.jar:?]
> at
> com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:67)
> [junit-rt.jar:?]
> at
> com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
> [junit-rt.jar:?]
> at
> com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
> [junit-rt.jar:?]
> Caused by: java.lang.NullPointerException
> at
> org.apache.flink.streaming.api.operators.collect.CollectSinkOperatorCoordinator.handleCoordinationRequest(CollectSinkOperatorCoordinator.java:107)
> ~[classes/:?]
> at
> org.apache.flink.runtime.scheduler.SchedulerBase.deliverCoordinationRequestToCoordinator(SchedulerBase.java:1078)
> ~[classes/:?]
> at
> org.apache.flink.runtime.jobmaster.JobMaster.deliverCoordinationRequestToCoordinator(JobMaster.java:771)
> ~[classes/:?]
> at jdk.internal.reflect.GeneratedMethodAccessor38.invoke(Unknown
> Source) ~[?:?]
> at
> jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> ~[?:?]
> at java.lang.reflect.Method.invoke(Method.java:566) ~[?:?]
> at
> org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRpcInvocation(AkkaRpcActor.java:286)
> ~[classes/:?]
> at
> org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRpcMessage(AkkaRpcActor.java:201)
> ~[classes/:?]
> at
> org.apache.flink.runtime.rpc.akka.FencedAkkaRpcActor.handleRpcMessage(FencedAkkaRpcActor.java:74)
> ~[classes/:?]
> at
> org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleMessage(AkkaRpcActor.java:154)
> ~[classes/:?]
> at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:26)
> ~[akka-actor_2.11-2.5.21.jar:2.5.21]
> at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:21)
> ~[akka-actor_2.11-2.5.21.jar:2.5.21]
> at scala.PartialFunction$class.applyOrElse(PartialFunction.scala:123)
> ~[scala-library-2.11.12.jar:?]
> at akka.japi.pf.UnitCaseStatement.applyOrElse(CaseStatements.scala:21)
> ~[akka-actor_2.11-2.5.21.jar:2.5.21]
> at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:170)
> ~[scala-library-2.11.12.jar:?]
> at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:171)
> ~[scala-library-2.11.12.jar:?]
> at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:171)
> ~[scala-library-2.11.12.jar:?]
> at akka.actor.Actor$class.aroundReceive(Actor.scala:517)
> ~[akka-actor_2.11-2.5.21.jar:2.5.21]
> at akka.actor.AbstractActor.aroundReceive(AbstractActor.scala:225)
> ~[akka-actor_2.11-2.5.21.jar:2.5.21]
> at akka.actor.ActorCell.receiveMessage(ActorCell.scala:592)
> ~[akka-actor_2.11-2.5.21.jar:2.5.21]
> at akka.actor.ActorCell.invoke(ActorCell.scala:561)
> ~[akka-actor_2.11-2.5.21.jar:2.5.21]
> at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:258)
> ~[akka-actor_2.11-2.5.21.jar:2.5.21]
> at akka.dispatch.Mailbox.run(Mailbox.scala:225)
> ~[akka-actor_2.11-2.5.21.jar:2.5.21]
> at akka.dispatch.Mailbox.exec(Mailbox.scala:235)
> ~[akka-actor_2.11-2.5.21.jar:2.5.21]
> at akka.dispatch.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
> ~[akka-actor_2.11-2.5.21.jar:2.5.21]
> at
> akka.dispatch.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
> ~[akka-actor_2.11-2.5.21.jar:2.5.21]
> at
> akka.dispatch.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
> ~[akka-actor_2.11-2.5.21.jar:2.5.21]
> at
> akka.dispatch.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
> ~[akka-actor_2.11-2.5.21.jar:2.5.21]
> {code}
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