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https://issues.apache.org/jira/browse/FLINK-3628?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aljoscha Krettek closed FLINK-3628.
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Resolution: Won't Fix
We'll keep setting the key context in case we ever allow chained operators to
also have keyed state.
> ChainingOutput and CopyingChainingOutput setKeyContextElement1 is no use
> ------------------------------------------------------------------------
>
> Key: FLINK-3628
> URL: https://issues.apache.org/jira/browse/FLINK-3628
> Project: Flink
> Issue Type: Task
> Components: DataStream API
> Reporter: Guowei Ma
> Assignee: Guowei Ma
> Priority: Minor
>
> the second operator of "chain" is not keyedstream any more.
> so it's no use to setKeyContextElement1
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