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https://issues.apache.org/jira/browse/FLINK-1713?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14366205#comment-14366205
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Alexander Alexandrov commented on FLINK-1713:
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I think he means Flink's native iteration support, i.e. execution plans which
are "wrapped" in an IterationHead and IterationTail operators.
> Add support for blocking data exchange in closed loop iterations
> ----------------------------------------------------------------
>
> Key: FLINK-1713
> URL: https://issues.apache.org/jira/browse/FLINK-1713
> Project: Flink
> Issue Type: Improvement
> Components: Distributed Runtime
> Affects Versions: master
> Reporter: Ufuk Celebi
> Priority: Minor
>
> The way that blocking intermediate results are currently managed prohibits
> them from being used inside of closed loops.
> A blocking result has to be fully produced before its receivers are deployed
> and there is no notion of single iterations etc.
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