[jira] [Work logged] (BEAM-12690) GroupIntoBatches does not properly maintain watermarks

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/BEAM-12690?focusedWorklogId=631363&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-631363 ]

ASF GitHub Bot logged work on BEAM-12690:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 29/Jul/21 21:27
            Start Date: 29/Jul/21 21:27
    Worklog Time Spent: 10m 
      Work Description: reuvenlax opened a new pull request #15249:
URL: https://github.com/apache/beam/pull/15249


   This bug has been observed by users of BigQueryIO. This PR modifies GroupIntoBatches to hold up the watermark while elements are being buffered.


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Issue Time Tracking
-------------------

            Worklog Id:     (was: 631363)
    Remaining Estimate: 0h
            Time Spent: 10m

> 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: P2
>          Time Spent: 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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