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https://issues.apache.org/jira/browse/FLINK-20888?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17260480#comment-17260480
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Aljoscha Krettek commented on FLINK-20888:
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Nice debugging! I think that in general operators are never supposed to call
{{close()}} on their outputs.
> ContinuousFileReaderOperator should not close the output on close()
> -------------------------------------------------------------------
>
> Key: FLINK-20888
> URL: https://issues.apache.org/jira/browse/FLINK-20888
> Project: Flink
> Issue Type: Bug
> Components: Connectors / FileSystem
> Affects Versions: 1.12.0
> Reporter: Yun Gao
> Priority: Major
>
> Currently ContinuousFileReaderOperator would close the output on close(), if
> it is chained with more operators, it would also close the following
> operators before their endOfInput() is called (by default, we would call
> op1.endInput(), op1.close(), op2.endInput(), op2.close()... in order). This
> might cause some problems like in
> [https://lists.apache.org/thread.html/r50a94aaea4fe25f3927a4274ea8272e6b76ecec8f3fe48d2566689bd%40%3Cuser.flink.apache.org%3E]
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