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From "Aljoscha Krettek (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (BEAM-1772) Support merging WindowFn other than IntervalWindow on Flink Runner
Date Thu, 23 Mar 2017 14:57:41 GMT

    [ https://issues.apache.org/jira/browse/BEAM-1772?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15938512#comment-15938512
] 

Aljoscha Krettek commented on BEAM-1772:
----------------------------------------

Yes, I think we can do that. It's the most generic solution and we shouldn't run into problems
because we only process elements of one key at a time.

> Support merging WindowFn other than IntervalWindow on Flink Runner
> ------------------------------------------------------------------
>
>                 Key: BEAM-1772
>                 URL: https://issues.apache.org/jira/browse/BEAM-1772
>             Project: Beam
>          Issue Type: Bug
>          Components: runner-flink
>            Reporter: Ismaël Mejía
>            Assignee: Aljoscha Krettek
>
> Flink currently supports merging IntervalWindows, however if you have a WindowFn who
extends IntervalWindow the execution breaks.
> I found this while executing a Pipeline in Flink's batch mode.
> This will involve probably changing the window merging logic in `FlinkMergingReduceFunction.mergeWindows()`
and other similar parts to really use the merging logic of the `WindowFn`.



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