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https://issues.apache.org/jira/browse/FLINK-22545?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17379876#comment-17379876
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Stephan Ewen commented on FLINK-22545:
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> From the exception message, it seems that the intention was rather to catch
> fatal errors (exceptions thrown out of the thread). However since we register
> an uncaught exception handler, this additional check doesn't seem necessary?
Probably not in this case, but the code allows plugging in other exception
handlers. I'll try to keep the original author's intention here...
> JVM crashes when runing
> OperatorEventSendingCheckpointITCase.testOperatorEventAckLost
> -------------------------------------------------------------------------------------
>
> Key: FLINK-22545
> URL: https://issues.apache.org/jira/browse/FLINK-22545
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Coordination, Tests
> Affects Versions: 1.12.3
> Reporter: Guowei Ma
> Assignee: Stephan Ewen
> Priority: Critical
> Labels: test-stability
> Fix For: 1.12.5
>
>
> https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=17501&view=logs&j=39d5b1d5-3b41-54dc-6458-1e2ddd1cdcf3&t=a99e99c7-21cd-5a1f-7274-585e62b72f56&l=4287
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