[ 
https://issues.apache.org/jira/browse/FLINK-30014?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Jiang Xin updated FLINK-30014:
------------------------------
    Description: 
The following exception is thrown in Flink ML CI step.
{code:java}
[INFO] Running org.apache.flink.ml.feature.CountVectorizerTest
435Error:  Tests run: 12, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 
6.419 s <<< FAILURE! - in org.apache.flink.ml.feature.CountVectorizerTest
436Error:  testFitAndPredict  Time elapsed: 0.66 s  <<< ERROR!
437java.lang.RuntimeException: Failed to fetch next result
438     at 
org.apache.flink.streaming.api.operators.collect.CollectResultIterator.nextResultFromFetcher(CollectResultIterator.java:109)
439     at 
org.apache.flink.streaming.api.operators.collect.CollectResultIterator.hasNext(CollectResultIterator.java:80)
440     at 
org.apache.commons.collections.IteratorUtils.toList(IteratorUtils.java:848)
441     at 
org.apache.commons.collections.IteratorUtils.toList(IteratorUtils.java:825)
442     at 
org.apache.flink.ml.feature.CountVectorizerTest.verifyPredictionResult(CountVectorizerTest.java:120)
443     at 
org.apache.flink.ml.feature.CountVectorizerTest.testFitAndPredict(CountVectorizerTest.java:208)
444     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
445     at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
446     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
447     at java.lang.reflect.Method.invoke(Method.java:498)
448     at 
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
449     at 
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
450     at 
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
451     at 
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
452     at 
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
453     at 
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
454     at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54)
455     at 
org.apache.flink.util.TestNameProvider$1.evaluate(TestNameProvider.java:45)
456     at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:61)
457     at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
458     at 
org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
459     at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
460     at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
461     at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
462     at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
463     at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
464     at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
465     at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
466     at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
467     at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54)
468     at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54)
469     at org.junit.rules.RunRules.evaluate(RunRules.java:20)
470     at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
471     at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
472     at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
473     at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
474     at 
org.junit.vintage.engine.execution.RunnerExecutor.execute(RunnerExecutor.java:42)
475     at 
org.junit.vintage.engine.VintageTestEngine.executeAllChildren(VintageTestEngine.java:80)
476     at 
org.junit.vintage.engine.VintageTestEngine.execute(VintageTestEngine.java:72)
477     at 
org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:220)
478     at 
org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$6(DefaultLauncher.java:188)
479     at 
org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:202)
480     at 
org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:181)
481     at 
org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:128)
482     at 
org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.invokeAllTests(JUnitPlatformProvider.java:142)
483     at 
org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.invoke(JUnitPlatformProvider.java:109)
484     at 
org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384)
485     at 
org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345)
486     at 
org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126)
487     at 
org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418)
488Caused by: java.io.IOException: Failed to fetch job execution result
489     at 
org.apache.flink.streaming.api.operators.collect.CollectResultFetcher.getAccumulatorResults(CollectResultFetcher.java:184)
490     at 
org.apache.flink.streaming.api.operators.collect.CollectResultFetcher.next(CollectResultFetcher.java:121)
491     at 
org.apache.flink.streaming.api.operators.collect.CollectResultIterator.nextResultFromFetcher(CollectResultIterator.java:106)
492     ... 49 more
493Caused by: java.util.concurrent.ExecutionException: 
org.apache.flink.runtime.client.JobExecutionException: Job execution failed.
494     at 
java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357)
495     at 
java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1928)
496     at 
org.apache.flink.streaming.api.operators.collect.CollectResultFetcher.getAccumulatorResults(CollectResultFetcher.java:182)
497     ... 51 more
498Caused by: org.apache.flink.runtime.client.JobExecutionException: Job 
execution failed.
499     at 
org.apache.flink.runtime.jobmaster.JobResult.toJobExecutionResult(JobResult.java:144)
500     at 
org.apache.flink.runtime.minicluster.MiniClusterJobClient.lambda$getJobExecutionResult$3(MiniClusterJobClient.java:141)
501     at 
java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:616)
502     at 
java.util.concurrent.CompletableFuture.uniApplyStage(CompletableFuture.java:628)
503     at 
java.util.concurrent.CompletableFuture.thenApply(CompletableFuture.java:1996)
504     at 
org.apache.flink.runtime.minicluster.MiniClusterJobClient.getJobExecutionResult(MiniClusterJobClient.java:138)
505     at 
org.apache.flink.streaming.api.operators.collect.CollectResultFetcher.getAccumulatorResults(CollectResultFetcher.java:181)
506     ... 51 more
507Caused by: org.apache.flink.runtime.JobException: Recovery is suppressed by 
NoRestartBackoffTimeStrategy
508     at 
org.apache.flink.runtime.executiongraph.failover.flip1.ExecutionFailureHandler.handleFailure(ExecutionFailureHandler.java:138)
509     at 
org.apache.flink.runtime.executiongraph.failover.flip1.ExecutionFailureHandler.getFailureHandlingResult(ExecutionFailureHandler.java:82)
510     at 
org.apache.flink.runtime.scheduler.DefaultScheduler.handleTaskFailure(DefaultScheduler.java:301)
511     at 
org.apache.flink.runtime.scheduler.DefaultScheduler.maybeHandleTaskFailure(DefaultScheduler.java:291)
512     at 
org.apache.flink.runtime.scheduler.DefaultScheduler.updateTaskExecutionStateInternal(DefaultScheduler.java:282)
513     at 
org.apache.flink.runtime.scheduler.SchedulerBase.updateTaskExecutionState(SchedulerBase.java:739)
514     at 
org.apache.flink.runtime.scheduler.SchedulerNG.updateTaskExecutionState(SchedulerNG.java:78)
515     at 
org.apache.flink.runtime.jobmaster.JobMaster.updateTaskExecutionState(JobMaster.java:443)
516     at sun.reflect.GeneratedMethodAccessor20.invoke(Unknown Source)
517     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
518     at java.lang.reflect.Method.invoke(Method.java:498)
519     at 
org.apache.flink.runtime.rpc.akka.AkkaRpcActor.lambda$handleRpcInvocation$1(AkkaRpcActor.java:304)
520     at 
org.apache.flink.runtime.concurrent.akka.ClassLoadingUtils.runWithContextClassLoader(ClassLoadingUtils.java:83)
521     at 
org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRpcInvocation(AkkaRpcActor.java:302)
522     at 
org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRpcMessage(AkkaRpcActor.java:217)
523     at 
org.apache.flink.runtime.rpc.akka.FencedAkkaRpcActor.handleRpcMessage(FencedAkkaRpcActor.java:78)
524     at 
org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleMessage(AkkaRpcActor.java:163)
525     at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:24)
526     at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:20)
527     at scala.PartialFunction.applyOrElse(PartialFunction.scala:123)
528     at scala.PartialFunction.applyOrElse$(PartialFunction.scala:122)
529     at akka.japi.pf.UnitCaseStatement.applyOrElse(CaseStatements.scala:20)
530     at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:171)
531     at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:172)
532     at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:172)
533     at akka.actor.Actor.aroundReceive(Actor.scala:537)
534     at akka.actor.Actor.aroundReceive$(Actor.scala:535)
535     at akka.actor.AbstractActor.aroundReceive(AbstractActor.scala:220)
536     at akka.actor.ActorCell.receiveMessage(ActorCell.scala:580)
537     at akka.actor.ActorCell.invoke(ActorCell.scala:548)
538     at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:270)
539     at akka.dispatch.Mailbox.run(Mailbox.scala:231)
540     at akka.dispatch.Mailbox.exec(Mailbox.scala:243)
541     at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
542     at 
java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
543     at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
544     at 
java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:175)
545Caused by: java.io.IOException: Could not perform checkpoint 1 for operator 
aggregate -> *anonymous_datastream_source$658*[743] -> TableToDataSteam (1/1)#0.
546     at 
org.apache.flink.streaming.runtime.tasks.StreamTask.triggerCheckpointOnBarrier(StreamTask.java:1210)
547     at 
org.apache.flink.streaming.runtime.io.checkpointing.CheckpointBarrierHandler.notifyCheckpoint(CheckpointBarrierHandler.java:147)
548     at 
org.apache.flink.streaming.runtime.io.checkpointing.SingleCheckpointBarrierHandler.triggerCheckpoint(SingleCheckpointBarrierHandler.java:287)
549     at 
org.apache.flink.streaming.runtime.io.checkpointing.SingleCheckpointBarrierHandler.access$100(SingleCheckpointBarrierHandler.java:64)
550     at 
org.apache.flink.streaming.runtime.io.checkpointing.SingleCheckpointBarrierHandler$ControllerImpl.triggerGlobalCheckpoint(SingleCheckpointBarrierHandler.java:493)
551     at 
org.apache.flink.streaming.runtime.io.checkpointing.AbstractAlignedBarrierHandlerState.triggerGlobalCheckpoint(AbstractAlignedBarrierHandlerState.java:74)
552     at 
org.apache.flink.streaming.runtime.io.checkpointing.AbstractAlignedBarrierHandlerState.barrierReceived(AbstractAlignedBarrierHandlerState.java:66)
553     at 
org.apache.flink.streaming.runtime.io.checkpointing.SingleCheckpointBarrierHandler.lambda$processBarrier$2(SingleCheckpointBarrierHandler.java:234)
554     at 
org.apache.flink.streaming.runtime.io.checkpointing.SingleCheckpointBarrierHandler.markCheckpointAlignedAndTransformState(SingleCheckpointBarrierHandler.java:262)
555     at 
org.apache.flink.streaming.runtime.io.checkpointing.SingleCheckpointBarrierHandler.processBarrier(SingleCheckpointBarrierHandler.java:231)
556     at 
org.apache.flink.streaming.runtime.io.checkpointing.CheckpointedInputGate.handleEvent(CheckpointedInputGate.java:181)
557     at 
org.apache.flink.streaming.runtime.io.checkpointing.CheckpointedInputGate.pollNext(CheckpointedInputGate.java:159)
558     at 
org.apache.flink.streaming.runtime.io.AbstractStreamTaskNetworkInput.emitNext(AbstractStreamTaskNetworkInput.java:110)
559     at 
org.apache.flink.streaming.runtime.io.StreamOneInputProcessor.processInput(StreamOneInputProcessor.java:65)
560     at 
org.apache.flink.streaming.runtime.tasks.StreamTask.processInput(StreamTask.java:519)
561     at 
org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:203)
562     at 
org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:804)
563     at 
org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:753)
564     at 
org.apache.flink.runtime.taskmanager.Task.runWithSystemExitMonitoring(Task.java:948)
565     at 
org.apache.flink.runtime.taskmanager.Task.restoreAndInvoke(Task.java:927)
566     at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:741)
567     at org.apache.flink.runtime.taskmanager.Task.run(Task.java:563)
568     at java.lang.Thread.run(Thread.java:750)
569Caused by: org.apache.flink.runtime.checkpoint.CheckpointException: Could 
not complete snapshot 1 for operator aggregate -> 
*anonymous_datastream_source$658*[743] -> TableToDataSteam (1/1)#0. Failure 
reason: Checkpoint was declined.
570     at 
org.apache.flink.streaming.api.operators.StreamOperatorStateHandler.snapshotState(StreamOperatorStateHandler.java:269)
571     at 
org.apache.flink.streaming.api.operators.StreamOperatorStateHandler.snapshotState(StreamOperatorStateHandler.java:173)
572     at 
org.apache.flink.streaming.api.operators.AbstractStreamOperator.snapshotState(AbstractStreamOperator.java:348)
573     at 
org.apache.flink.streaming.runtime.tasks.RegularOperatorChain.checkpointStreamOperator(RegularOperatorChain.java:227)
574     at 
org.apache.flink.streaming.runtime.tasks.RegularOperatorChain.buildOperatorSnapshotFutures(RegularOperatorChain.java:212)
575     at 
org.apache.flink.streaming.runtime.tasks.RegularOperatorChain.snapshotState(RegularOperatorChain.java:192)
576     at 
org.apache.flink.streaming.runtime.tasks.SubtaskCheckpointCoordinatorImpl.takeSnapshotSync(SubtaskCheckpointCoordinatorImpl.java:647)
577     at 
org.apache.flink.streaming.runtime.tasks.SubtaskCheckpointCoordinatorImpl.checkpointState(SubtaskCheckpointCoordinatorImpl.java:320)
578     at 
org.apache.flink.streaming.runtime.tasks.StreamTask.lambda$performCheckpoint$12(StreamTask.java:1253)
579     at 
org.apache.flink.streaming.runtime.tasks.StreamTaskActionExecutor$1.runThrowing(StreamTaskActionExecutor.java:50)
580     at 
org.apache.flink.streaming.runtime.tasks.StreamTask.performCheckpoint(StreamTask.java:1241)
581     at 
org.apache.flink.streaming.runtime.tasks.StreamTask.triggerCheckpointOnBarrier(StreamTask.java:1198)
582     ... 22 more
583Caused by: java.lang.NullPointerException: You cannot add null to a 
ListState.
584     at 
org.apache.flink.util.Preconditions.checkNotNull(Preconditions.java:76)
585     at 
org.apache.flink.runtime.state.PartitionableListState.add(PartitionableListState.java:94)
586     at 
org.apache.flink.ml.common.datastream.DataStreamUtils$AggregateOperator.snapshotState(DataStreamUtils.java:463)
587     at 
org.apache.flink.streaming.api.operators.StreamOperatorStateHandler.snapshotState(StreamOperatorStateHandler.java:222)
588     ... 33 more {code}

  was:
The following exception is thrown in Flink ML CI step.

```
[INFO] Running org.apache.flink.ml.feature.CountVectorizerTest 
[435|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:436]Error:
 Tests run: 12, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 6.419 s <<< 
FAILURE! - in org.apache.flink.ml.feature.CountVectorizerTest 
[436|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:437]Error:
 testFitAndPredict Time elapsed: 0.66 s <<< ERROR! 
[437|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:438]java.lang.RuntimeException:
 Failed to fetch next result 
[438|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:439]
 at 
org.apache.flink.streaming.api.operators.collect.CollectResultIterator.nextResultFromFetcher(CollectResultIterator.java:109)
 
[439|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:440]
 at 
org.apache.flink.streaming.api.operators.collect.CollectResultIterator.hasNext(CollectResultIterator.java:80)
 
[440|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:441]
 at org.apache.commons.collections.IteratorUtils.toList(IteratorUtils.java:848) 
[441|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:442]
 at org.apache.commons.collections.IteratorUtils.toList(IteratorUtils.java:825) 
[442|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:443]
 at 
org.apache.flink.ml.feature.CountVectorizerTest.verifyPredictionResult(CountVectorizerTest.java:120)
 
[443|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:444]
 at 
org.apache.flink.ml.feature.CountVectorizerTest.testFitAndPredict(CountVectorizerTest.java:208)
 
[444|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:445]
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
[445|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:446]
 at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
[446|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:447]
 at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 
[447|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:448]
 at java.lang.reflect.Method.invoke(Method.java:498) 
[448|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:449]
 at 
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
 
[449|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:450]
 at 
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
 
[450|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:451]
 at 
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
 
[451|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:452]
 at 
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
 
[452|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:453]
 at 
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26) 
[453|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:454]
 at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27) 
[454|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:455]
 at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54) 
[455|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:456]
 at org.apache.flink.util.TestNameProvider$1.evaluate(TestNameProvider.java:45) 
[456|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:457]
 at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:61) 
[457|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:458]
 at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306) 
[458|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:459]
 at 
org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
 
[459|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:460]
 at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366) 
[460|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:461]
 at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
 
[461|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:462]
 at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
 
[462|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:463]
 at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331) 
[463|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:464]
 at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79) 
[464|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:465]
 at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329) 
[465|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:466]
 at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66) 
[466|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:467]
 at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293) 
[467|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:468]
 at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54) 
[468|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:469]
 at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54) 
[469|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:470]
 at org.junit.rules.RunRules.evaluate(RunRules.java:20) 
[470|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:471]
 at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306) 
[471|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:472]
 at org.junit.runners.ParentRunner.run(ParentRunner.java:413) 
[472|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:473]
 at org.junit.runner.JUnitCore.run(JUnitCore.java:137) 
[473|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:474]
 at org.junit.runner.JUnitCore.run(JUnitCore.java:115) 
[474|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:475]
 at 
org.junit.vintage.engine.execution.RunnerExecutor.execute(RunnerExecutor.java:42)
 
[475|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:476]
 at 
org.junit.vintage.engine.VintageTestEngine.executeAllChildren(VintageTestEngine.java:80)
 
[476|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:477]
 at 
org.junit.vintage.engine.VintageTestEngine.execute(VintageTestEngine.java:72) 
[477|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:478]
 at 
org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:220)
 
[478|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:479]
 at 
org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$6(DefaultLauncher.java:188)
 
[479|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:480]
 at 
org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:202)
 
[480|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:481]
 at 
org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:181)
 
[481|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:482]
 at 
org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:128)
 
[482|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:483]
 at 
org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.invokeAllTests(JUnitPlatformProvider.java:142)
 
[483|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:484]
 at 
org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.invoke(JUnitPlatformProvider.java:109)
 
[484|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:485]
 at 
org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384)
 
[485|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:486]
 at 
org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345)
 
[486|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:487]
 at 
org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126) 
[487|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:488]
 at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418) 
[488|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:489]Caused
 by: java.io.IOException: Failed to fetch job execution result 
[489|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:490]
 at 
org.apache.flink.streaming.api.operators.collect.CollectResultFetcher.getAccumulatorResults(CollectResultFetcher.java:184)
 
[490|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:491]
 at 
org.apache.flink.streaming.api.operators.collect.CollectResultFetcher.next(CollectResultFetcher.java:121)
 
[491|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:492]
 at 
org.apache.flink.streaming.api.operators.collect.CollectResultIterator.nextResultFromFetcher(CollectResultIterator.java:106)
 
[492|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:493]
 ... 49 more 
[493|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:494]Caused
 by: java.util.concurrent.ExecutionException: 
org.apache.flink.runtime.client.JobExecutionException: Job execution failed. 
[494|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:495]
 at 
java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357) 
[495|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:496]
 at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1928) 
[496|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:497]
 at 
org.apache.flink.streaming.api.operators.collect.CollectResultFetcher.getAccumulatorResults(CollectResultFetcher.java:182)
 
[497|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:498]
 ... 51 more 
[498|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:499]Caused
 by: org.apache.flink.runtime.client.JobExecutionException: Job execution 
failed. 
[499|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:500]
 at 
org.apache.flink.runtime.jobmaster.JobResult.toJobExecutionResult(JobResult.java:144)
 
[500|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:501]
 at 
org.apache.flink.runtime.minicluster.MiniClusterJobClient.lambda$getJobExecutionResult$3(MiniClusterJobClient.java:141)
 
[501|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:502]
 at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:616) 
[502|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:503]
 at 
java.util.concurrent.CompletableFuture.uniApplyStage(CompletableFuture.java:628)
 
[503|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:504]
 at 
java.util.concurrent.CompletableFuture.thenApply(CompletableFuture.java:1996) 
[504|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:505]
 at 
org.apache.flink.runtime.minicluster.MiniClusterJobClient.getJobExecutionResult(MiniClusterJobClient.java:138)
 
[505|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:506]
 at 
org.apache.flink.streaming.api.operators.collect.CollectResultFetcher.getAccumulatorResults(CollectResultFetcher.java:181)
 
[506|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:507]
 ... 51 more 
[507|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:508]Caused
 by: org.apache.flink.runtime.JobException: Recovery is suppressed by 
NoRestartBackoffTimeStrategy 
[508|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:509]
 at 
org.apache.flink.runtime.executiongraph.failover.flip1.ExecutionFailureHandler.handleFailure(ExecutionFailureHandler.java:138)
 
[509|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:510]
 at 
org.apache.flink.runtime.executiongraph.failover.flip1.ExecutionFailureHandler.getFailureHandlingResult(ExecutionFailureHandler.java:82)
 
[510|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:511]
 at 
org.apache.flink.runtime.scheduler.DefaultScheduler.handleTaskFailure(DefaultScheduler.java:301)
 
[511|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:512]
 at 
org.apache.flink.runtime.scheduler.DefaultScheduler.maybeHandleTaskFailure(DefaultScheduler.java:291)
 
[512|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:513]
 at 
org.apache.flink.runtime.scheduler.DefaultScheduler.updateTaskExecutionStateInternal(DefaultScheduler.java:282)
 
[513|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:514]
 at 
org.apache.flink.runtime.scheduler.SchedulerBase.updateTaskExecutionState(SchedulerBase.java:739)
 
[514|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:515]
 at 
org.apache.flink.runtime.scheduler.SchedulerNG.updateTaskExecutionState(SchedulerNG.java:78)
 
[515|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:516]
 at 
org.apache.flink.runtime.jobmaster.JobMaster.updateTaskExecutionState(JobMaster.java:443)
 
[516|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:517]
 at sun.reflect.GeneratedMethodAccessor20.invoke(Unknown Source) 
[517|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:518]
 at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 
[518|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:519]
 at java.lang.reflect.Method.invoke(Method.java:498) 
[519|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:520]
 at 
org.apache.flink.runtime.rpc.akka.AkkaRpcActor.lambda$handleRpcInvocation$1(AkkaRpcActor.java:304)
 
[520|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:521]
 at 
org.apache.flink.runtime.concurrent.akka.ClassLoadingUtils.runWithContextClassLoader(ClassLoadingUtils.java:83)
 
[521|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:522]
 at 
org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRpcInvocation(AkkaRpcActor.java:302)
 
[522|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:523]
 at 
org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRpcMessage(AkkaRpcActor.java:217)
 
[523|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:524]
 at 
org.apache.flink.runtime.rpc.akka.FencedAkkaRpcActor.handleRpcMessage(FencedAkkaRpcActor.java:78)
 
[524|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:525]
 at 
org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleMessage(AkkaRpcActor.java:163)
 
[525|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:526]
 at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:24) 
[526|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:527]
 at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:20) 
[527|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:528]
 at scala.PartialFunction.applyOrElse(PartialFunction.scala:123) 
[528|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:529]
 at scala.PartialFunction.applyOrElse$(PartialFunction.scala:122) 
[529|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:530]
 at akka.japi.pf.UnitCaseStatement.applyOrElse(CaseStatements.scala:20) 
[530|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:531]
 at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:171) 
[531|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:532]
 at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:172) 
[532|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:533]
 at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:172) 
[533|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:534]
 at akka.actor.Actor.aroundReceive(Actor.scala:537) 
[534|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:535]
 at akka.actor.Actor.aroundReceive$(Actor.scala:535) 
[535|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:536]
 at akka.actor.AbstractActor.aroundReceive(AbstractActor.scala:220) 
[536|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:537]
 at akka.actor.ActorCell.receiveMessage(ActorCell.scala:580) 
[537|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:538]
 at akka.actor.ActorCell.invoke(ActorCell.scala:548) 
[538|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:539]
 at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:270) 
[539|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:540]
 at akka.dispatch.Mailbox.run(Mailbox.scala:231) 
[540|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:541]
 at akka.dispatch.Mailbox.exec(Mailbox.scala:243) 
[541|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:542]
 at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289) 
[542|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:543]
 at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056) 
[543|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:544]
 at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692) 
[544|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:545]
 at 
java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:175) 
[545|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:546]Caused
 by: java.io.IOException: Could not perform checkpoint 1 for operator aggregate 
-> {*}anonymous_datastream_source$658{*}[743] -> TableToDataSteam (1/1)#0. 
[546|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:547]
 at 
org.apache.flink.streaming.runtime.tasks.StreamTask.triggerCheckpointOnBarrier(StreamTask.java:1210)
 
[547|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:548]
 at 
org.apache.flink.streaming.runtime.io.checkpointing.CheckpointBarrierHandler.notifyCheckpoint(CheckpointBarrierHandler.java:147)
 
[548|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:549]
 at 
org.apache.flink.streaming.runtime.io.checkpointing.SingleCheckpointBarrierHandler.triggerCheckpoint(SingleCheckpointBarrierHandler.java:287)
 
[549|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:550]
 at 
org.apache.flink.streaming.runtime.io.checkpointing.SingleCheckpointBarrierHandler.access$100(SingleCheckpointBarrierHandler.java:64)
 
[550|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:551]
 at 
org.apache.flink.streaming.runtime.io.checkpointing.SingleCheckpointBarrierHandler$ControllerImpl.triggerGlobalCheckpoint(SingleCheckpointBarrierHandler.java:493)
 
[551|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:552]
 at 
org.apache.flink.streaming.runtime.io.checkpointing.AbstractAlignedBarrierHandlerState.triggerGlobalCheckpoint(AbstractAlignedBarrierHandlerState.java:74)
 
[552|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:553]
 at 
org.apache.flink.streaming.runtime.io.checkpointing.AbstractAlignedBarrierHandlerState.barrierReceived(AbstractAlignedBarrierHandlerState.java:66)
 
[553|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:554]
 at 
org.apache.flink.streaming.runtime.io.checkpointing.SingleCheckpointBarrierHandler.lambda$processBarrier$2(SingleCheckpointBarrierHandler.java:234)
 
[554|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:555]
 at 
org.apache.flink.streaming.runtime.io.checkpointing.SingleCheckpointBarrierHandler.markCheckpointAlignedAndTransformState(SingleCheckpointBarrierHandler.java:262)
 
[555|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:556]
 at 
org.apache.flink.streaming.runtime.io.checkpointing.SingleCheckpointBarrierHandler.processBarrier(SingleCheckpointBarrierHandler.java:231)
 
[556|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:557]
 at 
org.apache.flink.streaming.runtime.io.checkpointing.CheckpointedInputGate.handleEvent(CheckpointedInputGate.java:181)
 
[557|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:558]
 at 
org.apache.flink.streaming.runtime.io.checkpointing.CheckpointedInputGate.pollNext(CheckpointedInputGate.java:159)
 
[558|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:559]
 at 
org.apache.flink.streaming.runtime.io.AbstractStreamTaskNetworkInput.emitNext(AbstractStreamTaskNetworkInput.java:110)
 
[559|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:560]
 at 
org.apache.flink.streaming.runtime.io.StreamOneInputProcessor.processInput(StreamOneInputProcessor.java:65)
 
[560|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:561]
 at 
org.apache.flink.streaming.runtime.tasks.StreamTask.processInput(StreamTask.java:519)
 
[561|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:562]
 at 
org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:203)
 
[562|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:563]
 at 
org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:804)
 
[563|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:564]
 at 
org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:753) 
[564|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:565]
 at 
org.apache.flink.runtime.taskmanager.Task.runWithSystemExitMonitoring(Task.java:948)
 
[565|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:566]
 at org.apache.flink.runtime.taskmanager.Task.restoreAndInvoke(Task.java:927) 
[566|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:567]
 at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:741) 
[567|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:568]
 at org.apache.flink.runtime.taskmanager.Task.run(Task.java:563) 
[568|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:569]
 at java.lang.Thread.run(Thread.java:750) 
[569|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:570]Caused
 by: org.apache.flink.runtime.checkpoint.CheckpointException: Could not 
complete snapshot 1 for operator aggregate -> 
{*}anonymous_datastream_source$658{*}[743] -> TableToDataSteam (1/1)#0. Failure 
reason: Checkpoint was declined. 
[570|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:571]
 at 
org.apache.flink.streaming.api.operators.StreamOperatorStateHandler.snapshotState(StreamOperatorStateHandler.java:269)
 
[571|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:572]
 at 
org.apache.flink.streaming.api.operators.StreamOperatorStateHandler.snapshotState(StreamOperatorStateHandler.java:173)
 
[572|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:573]
 at 
org.apache.flink.streaming.api.operators.AbstractStreamOperator.snapshotState(AbstractStreamOperator.java:348)
 
[573|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:574]
 at 
org.apache.flink.streaming.runtime.tasks.RegularOperatorChain.checkpointStreamOperator(RegularOperatorChain.java:227)
 
[574|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:575]
 at 
org.apache.flink.streaming.runtime.tasks.RegularOperatorChain.buildOperatorSnapshotFutures(RegularOperatorChain.java:212)
 
[575|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:576]
 at 
org.apache.flink.streaming.runtime.tasks.RegularOperatorChain.snapshotState(RegularOperatorChain.java:192)
 
[576|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:577]
 at 
org.apache.flink.streaming.runtime.tasks.SubtaskCheckpointCoordinatorImpl.takeSnapshotSync(SubtaskCheckpointCoordinatorImpl.java:647)
 
[577|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:578]
 at 
org.apache.flink.streaming.runtime.tasks.SubtaskCheckpointCoordinatorImpl.checkpointState(SubtaskCheckpointCoordinatorImpl.java:320)
 
[578|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:579]
 at 
org.apache.flink.streaming.runtime.tasks.StreamTask.lambda$performCheckpoint$12(StreamTask.java:1253)
 
[579|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:580]
 at 
org.apache.flink.streaming.runtime.tasks.StreamTaskActionExecutor$1.runThrowing(StreamTaskActionExecutor.java:50)
 
[580|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:581]
 at 
org.apache.flink.streaming.runtime.tasks.StreamTask.performCheckpoint(StreamTask.java:1241)
 
[581|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:582]
 at 
org.apache.flink.streaming.runtime.tasks.StreamTask.triggerCheckpointOnBarrier(StreamTask.java:1198)
 
[582|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:583]
 ... 22 more 
[583|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:584]Caused
 by: java.lang.NullPointerException: You cannot add null to a ListState. 
[584|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:585]
 at org.apache.flink.util.Preconditions.checkNotNull(Preconditions.java:76) 
[585|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:586]
 at 
org.apache.flink.runtime.state.PartitionableListState.add(PartitionableListState.java:94)
 
[586|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:587]
 at 
org.apache.flink.ml.common.datastream.DataStreamUtils$AggregateOperator.snapshotState(DataStreamUtils.java:463)
 
[587|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:588]
 at 
org.apache.flink.streaming.api.operators.StreamOperatorStateHandler.snapshotState(StreamOperatorStateHandler.java:222)
 
[588|https://github.com/apache/flink-ml/actions/runs/3459311341/jobs/5774576369#step:4:589]
 ... 33 more
```


> Fix the NPE from aggregate util
> -------------------------------
>
>                 Key: FLINK-30014
>                 URL: https://issues.apache.org/jira/browse/FLINK-30014
>             Project: Flink
>          Issue Type: Bug
>          Components: Library / Machine Learning
>            Reporter: Jiang Xin
>            Priority: Major
>             Fix For: ml-2.2.0
>
>
> The following exception is thrown in Flink ML CI step.
> {code:java}
> [INFO] Running org.apache.flink.ml.feature.CountVectorizerTest
> 435Error:  Tests run: 12, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 
> 6.419 s <<< FAILURE! - in org.apache.flink.ml.feature.CountVectorizerTest
> 436Error:  testFitAndPredict  Time elapsed: 0.66 s  <<< ERROR!
> 437java.lang.RuntimeException: Failed to fetch next result
> 438   at 
> org.apache.flink.streaming.api.operators.collect.CollectResultIterator.nextResultFromFetcher(CollectResultIterator.java:109)
> 439   at 
> org.apache.flink.streaming.api.operators.collect.CollectResultIterator.hasNext(CollectResultIterator.java:80)
> 440   at 
> org.apache.commons.collections.IteratorUtils.toList(IteratorUtils.java:848)
> 441   at 
> org.apache.commons.collections.IteratorUtils.toList(IteratorUtils.java:825)
> 442   at 
> org.apache.flink.ml.feature.CountVectorizerTest.verifyPredictionResult(CountVectorizerTest.java:120)
> 443   at 
> org.apache.flink.ml.feature.CountVectorizerTest.testFitAndPredict(CountVectorizerTest.java:208)
> 444   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 445   at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> 446   at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 447   at java.lang.reflect.Method.invoke(Method.java:498)
> 448   at 
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
> 449   at 
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> 450   at 
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
> 451   at 
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> 452   at 
> org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
> 453   at 
> org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
> 454   at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54)
> 455   at 
> org.apache.flink.util.TestNameProvider$1.evaluate(TestNameProvider.java:45)
> 456   at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:61)
> 457   at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
> 458   at 
> org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
> 459   at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
> 460   at 
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
> 461   at 
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
> 462   at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
> 463   at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
> 464   at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
> 465   at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
> 466   at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
> 467   at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54)
> 468   at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54)
> 469   at org.junit.rules.RunRules.evaluate(RunRules.java:20)
> 470   at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
> 471   at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
> 472   at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
> 473   at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
> 474   at 
> org.junit.vintage.engine.execution.RunnerExecutor.execute(RunnerExecutor.java:42)
> 475   at 
> org.junit.vintage.engine.VintageTestEngine.executeAllChildren(VintageTestEngine.java:80)
> 476   at 
> org.junit.vintage.engine.VintageTestEngine.execute(VintageTestEngine.java:72)
> 477   at 
> org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:220)
> 478   at 
> org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$6(DefaultLauncher.java:188)
> 479   at 
> org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:202)
> 480   at 
> org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:181)
> 481   at 
> org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:128)
> 482   at 
> org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.invokeAllTests(JUnitPlatformProvider.java:142)
> 483   at 
> org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.invoke(JUnitPlatformProvider.java:109)
> 484   at 
> org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384)
> 485   at 
> org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345)
> 486   at 
> org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126)
> 487   at 
> org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418)
> 488Caused by: java.io.IOException: Failed to fetch job execution result
> 489   at 
> org.apache.flink.streaming.api.operators.collect.CollectResultFetcher.getAccumulatorResults(CollectResultFetcher.java:184)
> 490   at 
> org.apache.flink.streaming.api.operators.collect.CollectResultFetcher.next(CollectResultFetcher.java:121)
> 491   at 
> org.apache.flink.streaming.api.operators.collect.CollectResultIterator.nextResultFromFetcher(CollectResultIterator.java:106)
> 492   ... 49 more
> 493Caused by: java.util.concurrent.ExecutionException: 
> org.apache.flink.runtime.client.JobExecutionException: Job execution failed.
> 494   at 
> java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357)
> 495   at 
> java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1928)
> 496   at 
> org.apache.flink.streaming.api.operators.collect.CollectResultFetcher.getAccumulatorResults(CollectResultFetcher.java:182)
> 497   ... 51 more
> 498Caused by: org.apache.flink.runtime.client.JobExecutionException: Job 
> execution failed.
> 499   at 
> org.apache.flink.runtime.jobmaster.JobResult.toJobExecutionResult(JobResult.java:144)
> 500   at 
> org.apache.flink.runtime.minicluster.MiniClusterJobClient.lambda$getJobExecutionResult$3(MiniClusterJobClient.java:141)
> 501   at 
> java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:616)
> 502   at 
> java.util.concurrent.CompletableFuture.uniApplyStage(CompletableFuture.java:628)
> 503   at 
> java.util.concurrent.CompletableFuture.thenApply(CompletableFuture.java:1996)
> 504   at 
> org.apache.flink.runtime.minicluster.MiniClusterJobClient.getJobExecutionResult(MiniClusterJobClient.java:138)
> 505   at 
> org.apache.flink.streaming.api.operators.collect.CollectResultFetcher.getAccumulatorResults(CollectResultFetcher.java:181)
> 506   ... 51 more
> 507Caused by: org.apache.flink.runtime.JobException: Recovery is suppressed 
> by NoRestartBackoffTimeStrategy
> 508   at 
> org.apache.flink.runtime.executiongraph.failover.flip1.ExecutionFailureHandler.handleFailure(ExecutionFailureHandler.java:138)
> 509   at 
> org.apache.flink.runtime.executiongraph.failover.flip1.ExecutionFailureHandler.getFailureHandlingResult(ExecutionFailureHandler.java:82)
> 510   at 
> org.apache.flink.runtime.scheduler.DefaultScheduler.handleTaskFailure(DefaultScheduler.java:301)
> 511   at 
> org.apache.flink.runtime.scheduler.DefaultScheduler.maybeHandleTaskFailure(DefaultScheduler.java:291)
> 512   at 
> org.apache.flink.runtime.scheduler.DefaultScheduler.updateTaskExecutionStateInternal(DefaultScheduler.java:282)
> 513   at 
> org.apache.flink.runtime.scheduler.SchedulerBase.updateTaskExecutionState(SchedulerBase.java:739)
> 514   at 
> org.apache.flink.runtime.scheduler.SchedulerNG.updateTaskExecutionState(SchedulerNG.java:78)
> 515   at 
> org.apache.flink.runtime.jobmaster.JobMaster.updateTaskExecutionState(JobMaster.java:443)
> 516   at sun.reflect.GeneratedMethodAccessor20.invoke(Unknown Source)
> 517   at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 518   at java.lang.reflect.Method.invoke(Method.java:498)
> 519   at 
> org.apache.flink.runtime.rpc.akka.AkkaRpcActor.lambda$handleRpcInvocation$1(AkkaRpcActor.java:304)
> 520   at 
> org.apache.flink.runtime.concurrent.akka.ClassLoadingUtils.runWithContextClassLoader(ClassLoadingUtils.java:83)
> 521   at 
> org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRpcInvocation(AkkaRpcActor.java:302)
> 522   at 
> org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRpcMessage(AkkaRpcActor.java:217)
> 523   at 
> org.apache.flink.runtime.rpc.akka.FencedAkkaRpcActor.handleRpcMessage(FencedAkkaRpcActor.java:78)
> 524   at 
> org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleMessage(AkkaRpcActor.java:163)
> 525   at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:24)
> 526   at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:20)
> 527   at scala.PartialFunction.applyOrElse(PartialFunction.scala:123)
> 528   at scala.PartialFunction.applyOrElse$(PartialFunction.scala:122)
> 529   at akka.japi.pf.UnitCaseStatement.applyOrElse(CaseStatements.scala:20)
> 530   at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:171)
> 531   at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:172)
> 532   at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:172)
> 533   at akka.actor.Actor.aroundReceive(Actor.scala:537)
> 534   at akka.actor.Actor.aroundReceive$(Actor.scala:535)
> 535   at akka.actor.AbstractActor.aroundReceive(AbstractActor.scala:220)
> 536   at akka.actor.ActorCell.receiveMessage(ActorCell.scala:580)
> 537   at akka.actor.ActorCell.invoke(ActorCell.scala:548)
> 538   at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:270)
> 539   at akka.dispatch.Mailbox.run(Mailbox.scala:231)
> 540   at akka.dispatch.Mailbox.exec(Mailbox.scala:243)
> 541   at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
> 542   at 
> java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
> 543   at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
> 544   at 
> java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:175)
> 545Caused by: java.io.IOException: Could not perform checkpoint 1 for 
> operator aggregate -> *anonymous_datastream_source$658*[743] -> 
> TableToDataSteam (1/1)#0.
> 546   at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.triggerCheckpointOnBarrier(StreamTask.java:1210)
> 547   at 
> org.apache.flink.streaming.runtime.io.checkpointing.CheckpointBarrierHandler.notifyCheckpoint(CheckpointBarrierHandler.java:147)
> 548   at 
> org.apache.flink.streaming.runtime.io.checkpointing.SingleCheckpointBarrierHandler.triggerCheckpoint(SingleCheckpointBarrierHandler.java:287)
> 549   at 
> org.apache.flink.streaming.runtime.io.checkpointing.SingleCheckpointBarrierHandler.access$100(SingleCheckpointBarrierHandler.java:64)
> 550   at 
> org.apache.flink.streaming.runtime.io.checkpointing.SingleCheckpointBarrierHandler$ControllerImpl.triggerGlobalCheckpoint(SingleCheckpointBarrierHandler.java:493)
> 551   at 
> org.apache.flink.streaming.runtime.io.checkpointing.AbstractAlignedBarrierHandlerState.triggerGlobalCheckpoint(AbstractAlignedBarrierHandlerState.java:74)
> 552   at 
> org.apache.flink.streaming.runtime.io.checkpointing.AbstractAlignedBarrierHandlerState.barrierReceived(AbstractAlignedBarrierHandlerState.java:66)
> 553   at 
> org.apache.flink.streaming.runtime.io.checkpointing.SingleCheckpointBarrierHandler.lambda$processBarrier$2(SingleCheckpointBarrierHandler.java:234)
> 554   at 
> org.apache.flink.streaming.runtime.io.checkpointing.SingleCheckpointBarrierHandler.markCheckpointAlignedAndTransformState(SingleCheckpointBarrierHandler.java:262)
> 555   at 
> org.apache.flink.streaming.runtime.io.checkpointing.SingleCheckpointBarrierHandler.processBarrier(SingleCheckpointBarrierHandler.java:231)
> 556   at 
> org.apache.flink.streaming.runtime.io.checkpointing.CheckpointedInputGate.handleEvent(CheckpointedInputGate.java:181)
> 557   at 
> org.apache.flink.streaming.runtime.io.checkpointing.CheckpointedInputGate.pollNext(CheckpointedInputGate.java:159)
> 558   at 
> org.apache.flink.streaming.runtime.io.AbstractStreamTaskNetworkInput.emitNext(AbstractStreamTaskNetworkInput.java:110)
> 559   at 
> org.apache.flink.streaming.runtime.io.StreamOneInputProcessor.processInput(StreamOneInputProcessor.java:65)
> 560   at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.processInput(StreamTask.java:519)
> 561   at 
> org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:203)
> 562   at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:804)
> 563   at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:753)
> 564   at 
> org.apache.flink.runtime.taskmanager.Task.runWithSystemExitMonitoring(Task.java:948)
> 565   at 
> org.apache.flink.runtime.taskmanager.Task.restoreAndInvoke(Task.java:927)
> 566   at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:741)
> 567   at org.apache.flink.runtime.taskmanager.Task.run(Task.java:563)
> 568   at java.lang.Thread.run(Thread.java:750)
> 569Caused by: org.apache.flink.runtime.checkpoint.CheckpointException: Could 
> not complete snapshot 1 for operator aggregate -> 
> *anonymous_datastream_source$658*[743] -> TableToDataSteam (1/1)#0. Failure 
> reason: Checkpoint was declined.
> 570   at 
> org.apache.flink.streaming.api.operators.StreamOperatorStateHandler.snapshotState(StreamOperatorStateHandler.java:269)
> 571   at 
> org.apache.flink.streaming.api.operators.StreamOperatorStateHandler.snapshotState(StreamOperatorStateHandler.java:173)
> 572   at 
> org.apache.flink.streaming.api.operators.AbstractStreamOperator.snapshotState(AbstractStreamOperator.java:348)
> 573   at 
> org.apache.flink.streaming.runtime.tasks.RegularOperatorChain.checkpointStreamOperator(RegularOperatorChain.java:227)
> 574   at 
> org.apache.flink.streaming.runtime.tasks.RegularOperatorChain.buildOperatorSnapshotFutures(RegularOperatorChain.java:212)
> 575   at 
> org.apache.flink.streaming.runtime.tasks.RegularOperatorChain.snapshotState(RegularOperatorChain.java:192)
> 576   at 
> org.apache.flink.streaming.runtime.tasks.SubtaskCheckpointCoordinatorImpl.takeSnapshotSync(SubtaskCheckpointCoordinatorImpl.java:647)
> 577   at 
> org.apache.flink.streaming.runtime.tasks.SubtaskCheckpointCoordinatorImpl.checkpointState(SubtaskCheckpointCoordinatorImpl.java:320)
> 578   at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.lambda$performCheckpoint$12(StreamTask.java:1253)
> 579   at 
> org.apache.flink.streaming.runtime.tasks.StreamTaskActionExecutor$1.runThrowing(StreamTaskActionExecutor.java:50)
> 580   at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.performCheckpoint(StreamTask.java:1241)
> 581   at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.triggerCheckpointOnBarrier(StreamTask.java:1198)
> 582   ... 22 more
> 583Caused by: java.lang.NullPointerException: You cannot add null to a 
> ListState.
> 584   at 
> org.apache.flink.util.Preconditions.checkNotNull(Preconditions.java:76)
> 585   at 
> org.apache.flink.runtime.state.PartitionableListState.add(PartitionableListState.java:94)
> 586   at 
> org.apache.flink.ml.common.datastream.DataStreamUtils$AggregateOperator.snapshotState(DataStreamUtils.java:463)
> 587   at 
> org.apache.flink.streaming.api.operators.StreamOperatorStateHandler.snapshotState(StreamOperatorStateHandler.java:222)
> 588   ... 33 more {code}



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