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https://issues.apache.org/jira/browse/BEAM-12690?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17427819#comment-17427819
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Beam JIRA Bot commented on BEAM-12690:
--------------------------------------
This issue was marked "stale-P2" and has not received a public comment in 14
days. It is now automatically moved to P3. If you are still affected by it, you
can comment and move it back to P2.
> GroupIntoBatches does not properly maintain watermarks
> ------------------------------------------------------
>
> Key: BEAM-12690
> URL: https://issues.apache.org/jira/browse/BEAM-12690
> Project: Beam
> Issue Type: Improvement
> Components: sdk-java-core
> Reporter: Reuven Lax
> Priority: P3
> Time Spent: 2h 10m
> Remaining Estimate: 0h
>
> Since GIB buffers elements, the watermark should be held up to the minimum
> event-time buffered. Timer.withOutputTimestamp is the correct way to do this
> in Beam.
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