[ 
https://issues.apache.org/jira/browse/FLINK-27149?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Xingbo Huang updated FLINK-27149:
---------------------------------
    Labels: test-stability  (was: )

> KafkaSourceE2ECase.testScaleUp failed on AZP
> --------------------------------------------
>
>                 Key: FLINK-27149
>                 URL: https://issues.apache.org/jira/browse/FLINK-27149
>             Project: Flink
>          Issue Type: Bug
>          Components: Connectors / Kafka, Tests
>    Affects Versions: 1.16.0
>            Reporter: Roman Khachatryan
>            Priority: Major
>              Labels: test-stability
>             Fix For: 1.16.0
>
>
> https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=34404&view=logs&j=af184cdd-c6d8-5084-0b69-7e9c67b35f7a&t=160c9ae5-96fd-516e-1c91-deb81f59292a&l=15393
> {code:java}
> [INFO] -------------------------------------------------------
> [INFO]  T E S T S
> [INFO] -------------------------------------------------------
> [INFO] Running org.apache.flink.tests.util.kafka.KafkaSourceE2ECase
> [ERROR] Tests run: 16, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 
> 174.171 s <<< FAILURE! - in 
> org.apache.flink.tests.util.kafka.KafkaSourceE2ECase
> [ERROR] 
> org.apache.flink.tests.util.kafka.KafkaSourceE2ECase.testScaleUp(TestEnvironment,
>  DataStreamSourceExternalContext, CheckpointingMode)[1]  Time elapsed: 2.7 s  
> <<< ERROR!
> java.util.concurrent.ExecutionException: 
> java.util.concurrent.CompletionException: 
> org.apache.flink.runtime.checkpoint.CheckpointException: Checkpoint 
> Coordinator is suspending.
>       at 
> java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357)
>       at 
> java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1928)
>       at 
> org.apache.flink.connector.testframe.testsuites.SourceTestSuiteBase.restartFromSavepoint(SourceTestSuiteBase.java:343)
>       at 
> org.apache.flink.connector.testframe.testsuites.SourceTestSuiteBase.testScaleUp(SourceTestSuiteBase.java:258)
>       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:498)
>       at 
> org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:725)
>       at 
> org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
>       at 
> org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)
>       at 
> org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:149)
>       at 
> org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:140)
>       at 
> org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestTemplateMethod(TimeoutExtension.java:92)
>       at 
> org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115)
>       at 
> org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105)
>       at 
> org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)
>       at 
> org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64)
>       at 
> org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45)
>       at 
> org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37)
>       at 
> org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104)
>       at 
> org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98)
>       at 
> org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$7(TestMethodTestDescriptor.java:214)
>       at 
> org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
>       at 
> org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:210)
>       at 
> org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:135)
>       at 
> org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:66)
>       at 
> org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:151)
>       at 
> org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
>       at 
> org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
>       at 
> org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
>       at 
> org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
>       at 
> org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
>       at 
> org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
>       at 
> org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
>       at 
> org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:35)
>       at 
> org.junit.platform.engine.support.hierarchical.NodeTestTask$DefaultDynamicTestExecutor.execute(NodeTestTask.java:226)
>       at 
> org.junit.platform.engine.support.hierarchical.NodeTestTask$DefaultDynamicTestExecutor.execute(NodeTestTask.java:204)
>       at 
> org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.execute(TestTemplateTestDescriptor.java:139)
>       at 
> org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.lambda$execute$2(TestTemplateTestDescriptor.java:107)
>       at 
> java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
>       at 
> java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
>       at 
> java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)
>       at 
> java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
>       at 
> java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
>       at 
> java.util.LinkedList$LLSpliterator.forEachRemaining(LinkedList.java:1235)
>       at 
> java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:647)
>       at 
> java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:272)
>       at 
> java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1384)
>       at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
>       at 
> java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
>       at 
> java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
>       at 
> java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
>       at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
>       at 
> java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:485)
>       at 
> java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:272)
>       at 
> java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1384)
>       at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
>       at 
> java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
>       at 
> java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
>       at 
> java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
>       at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
>       at 
> java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:485)
>       at 
> org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.execute(TestTemplateTestDescriptor.java:107)
>       at 
> org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.execute(TestTemplateTestDescriptor.java:42)
>       at 
> org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:151)
>       at 
> org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
>       at 
> org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
>       at 
> org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
>       at 
> org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
>       at 
> org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
>       at 
> org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
>       at 
> org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
>       at java.util.ArrayList.forEach(ArrayList.java:1259)
>       at 
> org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41)
>       at 
> org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155)
>       at 
> org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
>       at 
> org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
>       at 
> org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
>       at 
> org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
>       at 
> org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
>       at 
> org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
>       at 
> org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
>       at java.util.ArrayList.forEach(ArrayList.java:1259)
>       at 
> org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41)
>       at 
> org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155)
>       at 
> org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
>       at 
> org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
>       at 
> org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
>       at 
> org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
>       at 
> org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
>       at 
> org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
>       at 
> org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
>       at 
> org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:35)
>       at 
> org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
>       at 
> org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:54)
>       at 
> org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:107)
>       at 
> org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:88)
>       at 
> org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:54)
>       at 
> org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:67)
>       at 
> org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:52)
>       at 
> org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:114)
>       at 
> org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:86)
>       at 
> org.junit.platform.launcher.core.DefaultLauncherSession$DelegatingLauncher.execute(DefaultLauncherSession.java:86)
>       at 
> org.junit.platform.launcher.core.SessionPerRequestLauncher.execute(SessionPerRequestLauncher.java:53)
>       at 
> org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.execute(JUnitPlatformProvider.java:188)
>       at 
> org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.invokeAllTests(JUnitPlatformProvider.java:154)
>       at 
> org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.invoke(JUnitPlatformProvider.java:128)
>       at 
> org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:428)
>       at 
> org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:162)
>       at 
> org.apache.maven.surefire.booter.ForkedBooter.run(ForkedBooter.java:562)
>       at 
> org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:548)
> Caused by: java.util.concurrent.CompletionException: 
> org.apache.flink.runtime.checkpoint.CheckpointException: Checkpoint 
> Coordinator is suspending.
>       at 
> java.util.concurrent.CompletableFuture.encodeRelay(CompletableFuture.java:326)
>       at 
> java.util.concurrent.CompletableFuture.completeRelay(CompletableFuture.java:338)
>       at 
> java.util.concurrent.CompletableFuture.uniRelay(CompletableFuture.java:925)
>       at 
> java.util.concurrent.CompletableFuture$UniRelay.tryFire(CompletableFuture.java:913)
>       at 
> java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:488)
>       at 
> java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1990)
>       at 
> org.apache.flink.runtime.rpc.akka.AkkaInvocationHandler.lambda$invokeRpc$1(AkkaInvocationHandler.java:258)
>       at 
> java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:774)
>       at 
> java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(CompletableFuture.java:750)
>       at 
> java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:488)
>       at 
> java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1990)
>       at 
> org.apache.flink.util.concurrent.FutureUtils.doForward(FutureUtils.java:1340)
>       at 
> org.apache.flink.runtime.concurrent.akka.ClassLoadingUtils.lambda$null$1(ClassLoadingUtils.java:93)
>       at 
> org.apache.flink.runtime.concurrent.akka.ClassLoadingUtils.runWithContextClassLoader(ClassLoadingUtils.java:68)
>       at 
> org.apache.flink.runtime.concurrent.akka.ClassLoadingUtils.lambda$guardCompletionWithContextClassLoader$2(ClassLoadingUtils.java:92)
>       at 
> java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:774)
>       at 
> java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(CompletableFuture.java:750)
>       at 
> java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:488)
>       at 
> java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1990)
>       at 
> org.apache.flink.runtime.concurrent.akka.AkkaFutureUtils$1.onComplete(AkkaFutureUtils.java:45)
>       at akka.dispatch.OnComplete.internal(Future.scala:299)
>       at akka.dispatch.OnComplete.internal(Future.scala:297)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:224)
>       at akka.dispatch.japi$CallbackBridge.apply(Future.scala:221)
>       at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:60)
>       at 
> org.apache.flink.runtime.concurrent.akka.AkkaFutureUtils$DirectExecutionContext.execute(AkkaFutureUtils.java:65)
>       at 
> scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:68)
>       at 
> scala.concurrent.impl.Promise$DefaultPromise.$anonfun$tryComplete$1(Promise.scala:284)
>       at 
> scala.concurrent.impl.Promise$DefaultPromise.$anonfun$tryComplete$1$adapted(Promise.scala:284)
>       at 
> scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:284)
>       at akka.pattern.PromiseActorRef.$bang(AskSupport.scala:621)
>       at 
> akka.pattern.PipeToSupport$PipeableFuture$$anonfun$pipeTo$1.applyOrElse(PipeToSupport.scala:25)
>       at 
> akka.pattern.PipeToSupport$PipeableFuture$$anonfun$pipeTo$1.applyOrElse(PipeToSupport.scala:23)
>       at scala.concurrent.Future.$anonfun$andThen$1(Future.scala:532)
>       at scala.concurrent.impl.Promise.liftedTree1$1(Promise.scala:29)
>       at scala.concurrent.impl.Promise.$anonfun$transform$1(Promise.scala:29)
>       at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:60)
>       at 
> akka.dispatch.BatchingExecutor$AbstractBatch.processBatch(BatchingExecutor.scala:63)
>       at 
> akka.dispatch.BatchingExecutor$BlockableBatch.$anonfun$run$1(BatchingExecutor.scala:100)
>       at 
> scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12)
>       at 
> scala.concurrent.BlockContext$.withBlockContext(BlockContext.scala:81)
>       at 
> akka.dispatch.BatchingExecutor$BlockableBatch.run(BatchingExecutor.scala:100)
>       at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:49)
>       at 
> akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(ForkJoinExecutorConfigurator.scala:48)
>       at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
>       at 
> java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
>       at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
>       at 
> java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:175)
> Caused by: org.apache.flink.runtime.checkpoint.CheckpointException: 
> Checkpoint Coordinator is suspending.
>       at 
> org.apache.flink.runtime.checkpoint.PendingCheckpoint.abort(PendingCheckpoint.java:549)
>       at 
> org.apache.flink.runtime.checkpoint.CheckpointCoordinator.abortPendingCheckpoint(CheckpointCoordinator.java:2078)
>       at 
> org.apache.flink.runtime.checkpoint.CheckpointCoordinator.abortPendingCheckpoint(CheckpointCoordinator.java:2065)
>       at 
> org.apache.flink.runtime.checkpoint.CheckpointCoordinator.abortPendingCheckpoints(CheckpointCoordinator.java:1942)
>       at 
> org.apache.flink.runtime.checkpoint.CheckpointCoordinator.abortPendingCheckpoints(CheckpointCoordinator.java:1925)
>       at 
> org.apache.flink.runtime.checkpoint.CheckpointCoordinator.abortPendingAndQueuedCheckpoints(CheckpointCoordinator.java:2121)
>       at 
> org.apache.flink.runtime.checkpoint.CheckpointCoordinator.stopCheckpointScheduler(CheckpointCoordinator.java:1910)
>       at 
> org.apache.flink.runtime.checkpoint.CheckpointCoordinatorDeActivator.jobStatusChanges(CheckpointCoordinatorDeActivator.java:46)
>       at 
> org.apache.flink.runtime.executiongraph.DefaultExecutionGraph.notifyJobStatusChange(DefaultExecutionGraph.java:1505)
>       at 
> org.apache.flink.runtime.executiongraph.DefaultExecutionGraph.transitionState(DefaultExecutionGraph.java:1109)
>       at 
> org.apache.flink.runtime.executiongraph.DefaultExecutionGraph.transitionState(DefaultExecutionGraph.java:1085)
>       at 
> org.apache.flink.runtime.executiongraph.DefaultExecutionGraph.failJob(DefaultExecutionGraph.java:1218)
>       at 
> org.apache.flink.runtime.scheduler.SchedulerBase.failJob(SchedulerBase.java:527)
>       at 
> org.apache.flink.runtime.scheduler.DefaultScheduler.maybeRestartTasks(DefaultScheduler.java:330)
>       at 
> org.apache.flink.runtime.scheduler.DefaultScheduler.handleGlobalFailure(DefaultScheduler.java:323)
>       at 
> org.apache.flink.runtime.operators.coordination.OperatorCoordinatorHolder.checkpointCoordinatorInternal(OperatorCoordinatorHolder.java:307)
>       at 
> org.apache.flink.runtime.operators.coordination.OperatorCoordinatorHolder.lambda$checkpointCoordinator$0(OperatorCoordinatorHolder.java:230)
>       at 
> org.apache.flink.runtime.rpc.akka.AkkaRpcActor.lambda$handleRunAsync$4(AkkaRpcActor.java:443)
>       at 
> org.apache.flink.runtime.concurrent.akka.ClassLoadingUtils.runWithContextClassLoader(ClassLoadingUtils.java:68)
>       at 
> org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRunAsync(AkkaRpcActor.java:443)
>       at 
> org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRpcMessage(AkkaRpcActor.java:213)
>       at 
> org.apache.flink.runtime.rpc.akka.FencedAkkaRpcActor.handleRpcMessage(FencedAkkaRpcActor.java:78)
>       at 
> org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleMessage(AkkaRpcActor.java:163)
>       at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:24)
>       at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:20)
>       at scala.PartialFunction.applyOrElse(PartialFunction.scala:123)
>       at scala.PartialFunction.applyOrElse$(PartialFunction.scala:122)
>       at akka.japi.pf.UnitCaseStatement.applyOrElse(CaseStatements.scala:20)
>       at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:171)
>       at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:172)
>       at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:172)
>       at akka.actor.Actor.aroundReceive(Actor.scala:537)
>       at akka.actor.Actor.aroundReceive$(Actor.scala:535)
>       at akka.actor.AbstractActor.aroundReceive(AbstractActor.scala:220)
>       at akka.actor.ActorCell.receiveMessage(ActorCell.scala:580)
>       at akka.actor.ActorCell.invoke(ActorCell.scala:548)
>       at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:270)
>       at akka.dispatch.Mailbox.run(Mailbox.scala:231)
>       at akka.dispatch.Mailbox.exec(Mailbox.scala:243)
>       ... 4 more
> {code}



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