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https://issues.apache.org/jira/browse/FLINK-1773?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gyula Fora resolved FLINK-1773.
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Resolution: Implemented
https://github.com/apache/flink/pull/523
> Add interface for grouped policies to broadcast information to other groups
> ---------------------------------------------------------------------------
>
> Key: FLINK-1773
> URL: https://issues.apache.org/jira/browse/FLINK-1773
> Project: Flink
> Issue Type: New Feature
> Components: Streaming
> Affects Versions: 0.9
> Reporter: Gyula Fora
> Assignee: Gyula Fora
> Priority: Minor
>
> The current windowing does not allow grouped policies to broadcast
> information to each other. Adding this would allow closing windows earlier
> than the next element arrives for the same group. This makes nice use cases
> possible like detecting user sessions on data streams.
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