[
https://issues.apache.org/jira/browse/BEAM-9888?focusedWorklogId=430721&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-430721
]
ASF GitHub Bot logged work on BEAM-9888:
----------------------------------------
Author: ASF GitHub Bot
Created on: 05/May/20 14:57
Start Date: 05/May/20 14:57
Worklog Time Spent: 10m
Work Description: je-ik opened a new pull request #11612:
URL: https://github.com/apache/beam/pull/11612
Fixes [BEAM-9888].
------------------------
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Issue Time Tracking
-------------------
Worklog Id: (was: 430721)
Remaining Estimate: 0h
Time Spent: 10m
> @RequiresTimeSortedInput might feed data out of order
> -----------------------------------------------------
>
> Key: BEAM-9888
> URL: https://issues.apache.org/jira/browse/BEAM-9888
> Project: Beam
> Issue Type: Bug
> Components: runner-core
> Affects Versions: 2.20.0
> Reporter: Jan Lukavský
> Assignee: Jan Lukavský
> Priority: Major
> Fix For: 2.21.0
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> StatefulDoFnRunner drops late data based on output watermark, but output
> watermark might not advance fast enough to discard data that should have been
> dropped. We have to either:
> a) drop data based on input watermark, or
> b) drop data based on timestamp of last emitted element
> I'm a little in favor of b), because it can drop less data.
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