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https://issues.apache.org/jira/browse/BEAM-7785?focusedWorklogId=283214&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-283214
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ASF GitHub Bot logged work on BEAM-7785:
----------------------------------------
Author: ASF GitHub Bot
Created on: 26/Jul/19 09:08
Start Date: 26/Jul/19 09:08
Worklog Time Spent: 10m
Work Description: je-ik commented on pull request #9167: [BEAM-7785]
Synchronize watermarks with bundle processing
URL: https://github.com/apache/beam/pull/9167
Fixes [BEAM-7785] by locking only specific AppliedPTransform.
------------------------
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Issue Time Tracking
-------------------
Worklog Id: (was: 283214)
Time Spent: 3h (was: 2h 50m)
> DirectRunner: watermarks are updated asynchronously from bundle processing
> --------------------------------------------------------------------------
>
> Key: BEAM-7785
> URL: https://issues.apache.org/jira/browse/BEAM-7785
> Project: Beam
> Issue Type: Bug
> Components: runner-direct
> Affects Versions: 2.13.0
> Reporter: Jan Lukavský
> Assignee: Jan Lukavský
> Priority: Major
> Fix For: 2.15.0
>
> Time Spent: 3h
> Remaining Estimate: 0h
>
> Watermarks are updated in QuiescenceDriver (by calling fireTimers, which
> calls forceRefresh()) on WatermarkManager. This results in creating timer
> bundles, that are then processed asynchronously as DirectTransformExecutor.
> Because of that, watermarks (input watermarks mostly) might be updated while
> bundle is being processed. That violates assumption, that bundle processing
> should be atomical (with identical external conditions during processing of
> whole bundle).
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