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https://issues.apache.org/jira/browse/FLINK-7954?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16337524#comment-16337524
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Aljoscha Krettek commented on FLINK-7954:
-----------------------------------------
I think this might be prohibitively difficult because the side output feature
relies on the special {{Context}} object that
{{ProcessFunction.processElement()}} gets. Adding something like this would
break the API and also the ordering [~foxss] mentioned would be tricky to get
right.
We might be able to do it by extending the {{ResultFuture}}, though.
> sideoutput in async function
> ----------------------------
>
> Key: FLINK-7954
> URL: https://issues.apache.org/jira/browse/FLINK-7954
> Project: Flink
> Issue Type: Improvement
> Components: DataStream API
> Affects Versions: 1.3.2
> Environment: similar to FLINK-7635,adding support of sideoutput to
> asynFunction
> Reporter: Chen Qin
> Assignee: Bowen Li
> Priority: Major
>
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