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https://issues.apache.org/jira/browse/FLINK-20413?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Stephan Ewen closed FLINK-20413.
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> Sources should add splits back in "resetSubtask()", rather than in
> "subtaskFailed()".
> -------------------------------------------------------------------------------------
>
> Key: FLINK-20413
> URL: https://issues.apache.org/jira/browse/FLINK-20413
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Coordination
> Reporter: Stephan Ewen
> Assignee: Stephan Ewen
> Priority: Major
> Fix For: 1.12.0
>
>
> Because "subtaskFailed()" has no strong order guarantees with checkpoint
> completion, we need to return failed splits in "resetSubtask()" instead.
> See FLINK-20396 for a detailed explanation of the race condition.
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