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https://issues.apache.org/jira/browse/FLINK-13491?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16896101#comment-16896101
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Biao Liu commented on FLINK-13491:
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[~pnowojski], I agree we should keep it at least for 1.9.
I will fix it. Could you assign this ticket to me?

> AsyncWaitOperator doesn't handle endInput call properly
> -------------------------------------------------------
>
>                 Key: FLINK-13491
>                 URL: https://issues.apache.org/jira/browse/FLINK-13491
>             Project: Flink
>          Issue Type: Bug
>          Components: API / DataStream
>    Affects Versions: 1.9.0
>            Reporter: Piotr Nowojski
>            Priority: Blocker
>             Fix For: 1.9.0
>
>
> This is the same issue as for {{ContinousFileReaderOperator}} in 
> https://issues.apache.org/jira/browse/FLINK-13376. {{AsyncWaitOperator}} will 
> propagate {{endInput}} notification immediately, even if it has some records 
> buffered.
> Side note, this also shows that the current {{BoundedOneInput#endInput}} API 
> is easy to mishandle if an operator buffers some records internally. Maybe we 
> could redesign this API somehow [~aljoscha] [~sunhaibotb]?



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