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https://issues.apache.org/jira/browse/FLINK-22420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17376541#comment-17376541
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Till Rohrmann commented on FLINK-22420:
---------------------------------------
Thanks for sharing the logs with me [~ym]. I looked through the logs and I
couldn't find anything suspicious. It is a pity that we swallowed the
underlying reason why the {{NoMoreSplitEvent}} was not delivered. Having this
fixed now, I would suggest to close the tickets as cannot reproduce and to
re-open them once the test failure occurs another time.
> UnalignedCheckpointITCase failed
> --------------------------------
>
> Key: FLINK-22420
> URL: https://issues.apache.org/jira/browse/FLINK-22420
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Checkpointing
> Affects Versions: 1.14.0
> Reporter: Guowei Ma
> Assignee: Till Rohrmann
> Priority: Minor
> Labels: auto-deprioritized-major, pull-request-available,
> test-stability
>
> https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=17052&view=logs&j=34f41360-6c0d-54d3-11a1-0292a2def1d9&t=2d56e022-1ace-542f-bf1a-b37dd63243f2&l=9442
> {code:java}
> Apr 22 14:28:21 at
> akka.japi.pf.UnitCaseStatement.applyOrElse(CaseStatements.scala:21)
> Apr 22 14:28:21 at
> scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:170)
> Apr 22 14:28:21 at
> scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:171)
> Apr 22 14:28:21 at
> scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:171)
> Apr 22 14:28:21 at akka.actor.Actor$class.aroundReceive(Actor.scala:517)
> Apr 22 14:28:21 at
> akka.actor.AbstractActor.aroundReceive(AbstractActor.scala:225)
> Apr 22 14:28:21 at
> akka.actor.ActorCell.receiveMessage(ActorCell.scala:592)
> Apr 22 14:28:21 at akka.actor.ActorCell.invoke(ActorCell.scala:561)
> Apr 22 14:28:21 at
> akka.dispatch.Mailbox.processMailbox(Mailbox.scala:258)
> Apr 22 14:28:21 at akka.dispatch.Mailbox.run(Mailbox.scala:225)
> Apr 22 14:28:21 at akka.dispatch.Mailbox.exec(Mailbox.scala:235)
> Apr 22 14:28:21 at
> akka.dispatch.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
> Apr 22 14:28:21 at
> akka.dispatch.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
> Apr 22 14:28:21 at
> akka.dispatch.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
> Apr 22 14:28:21 at
> akka.dispatch.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
> Apr 22 14:28:21 Caused by: org.apache.flink.util.FlinkException: An
> OperatorEvent from an OperatorCoordinator to a task was lost. Triggering task
> failover to ensure consistency. Event: '[NoMoreSplitEvent]', targetTask:
> Source: source (1/1) - execution #5
> Apr 22 14:28:21 ... 26 more
> Apr 22 14:28:21
> {code}
> As described in the comment
> https://issues.apache.org/jira/browse/FLINK-21996?focusedCommentId=17326449&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-17326449
> we might need to adjust the tests to allow failover.
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