[
https://issues.apache.org/jira/browse/BEAM-1589?focusedWorklogId=435964&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-435964
]
ASF GitHub Bot logged work on BEAM-1589:
----------------------------------------
Author: ASF GitHub Bot
Created on: 21/May/20 12:44
Start Date: 21/May/20 12:44
Worklog Time Spent: 10m
Work Description: harriskistpay opened a new pull request #11773:
URL: https://github.com/apache/beam/pull/11773
Updated CHANGES.md file
------------------------
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| --- | --- | [](https://builds.apache.org/job/beam_PostCommit_Go_VR_Spark/lastCompletedBuild/)
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| --- | [](https://builds.apache.org/job/beam_PostCommit_Py_VR_Dataflow/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Py_VR_Dataflow_V2/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Py_ValCont/lastCompletedBuild/)
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| --- | ---
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Issue Time Tracking
-------------------
Worklog Id: (was: 435964)
Time Spent: 12h 50m (was: 12h 40m)
> Add OnWindowExpiration method to Stateful DoFn
> ----------------------------------------------
>
> Key: BEAM-1589
> URL: https://issues.apache.org/jira/browse/BEAM-1589
> Project: Beam
> Issue Type: New Feature
> Components: runner-core, sdk-java-core
> Reporter: Jingsong Lee
> Assignee: Rehman Murad Ali
> Priority: P2
> Time Spent: 12h 50m
> Remaining Estimate: 0h
>
> See BEAM-1517
> This allows the user to do some work before the state's garbage collection.
> It seems kind of annoying, but on the other hand forgetting to set a final
> timer to flush state is probably data loss most of the time.
> FlinkRunner does this work very simply, but other runners, such as
> DirectRunner, need to traverse all the states to do this, and maybe it's a
> little hard.
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