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https://issues.apache.org/jira/browse/FLINK-7157?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17328745#comment-17328745
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Flink Jira Bot commented on FLINK-7157:
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This major issue is unassigned and itself and all of its Sub-Tasks have not
been updated for 30 days. So, it has been labeled "stale-major". If this ticket
is indeed "major", please either assign yourself or give an update. Afterwards,
please remove the label. In 7 days the issue will be deprioritized.
> Provide support for asynchronous operations over connected streams
> ------------------------------------------------------------------
>
> Key: FLINK-7157
> URL: https://issues.apache.org/jira/browse/FLINK-7157
> Project: Flink
> Issue Type: New Feature
> Components: API / DataStream
> Reporter: Pedro Miguel Rainho Chaves
> Priority: Major
> Labels: stale-major
>
> The asynchronous function provides a great way to process events in parallel,
> which can greatly increase the throughput. However, a user may want to
> process events in parallel based on a stored state created by another stream.
> For instance, one could have a stream of scripts (e.g. groovy scripts) and a
> stream of events. Processing the events by the scripts in a CoFlatMap greatly
> reduces the performance if those take a long time to execute, specially in
> cases with a high number of scripts.
> One could argue that increasing the parallelism of the CoFlatMap would solve
> the problem, however it would come at a very high resource cost.
> It would be nice to have a *CoAsyncFunction* which would allow one of the
> streams in a *connectedStream* to be processed in an asynchronous fashion.
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