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Posted to issues@beam.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2020/09/01 20:58:00 UTC
[jira] [Work logged] (BEAM-10760) Cleanup timers lead to unbounded
state accumulation in global window
[ https://issues.apache.org/jira/browse/BEAM-10760?focusedWorklogId=477457&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-477457 ]
ASF GitHub Bot logged work on BEAM-10760:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 01/Sep/20 20:57
Start Date: 01/Sep/20 20:57
Worklog Time Spent: 10m
Work Description: tweise commented on pull request #12733:
URL: https://github.com/apache/beam/pull/12733#issuecomment-685128393
@mxm PTAL
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Issue Time Tracking
-------------------
Worklog Id: (was: 477457)
Time Spent: 40m (was: 0.5h)
> Cleanup timers lead to unbounded state accumulation in global window
> --------------------------------------------------------------------
>
> Key: BEAM-10760
> URL: https://issues.apache.org/jira/browse/BEAM-10760
> Project: Beam
> Issue Type: Bug
> Components: runner-core, runner-flink
> Affects Versions: 2.21.0
> Reporter: Thomas Weise
> Assignee: Thomas Weise
> Priority: P2
> Time Spent: 40m
> Remaining Estimate: 0h
>
> For each key, the runner sets a cleanup timer that is designed to garbage collect state at the end of a window. For a global window, these timers will stay around until the pipeline terminates. Depending on the key cardinality, this can lead to unbounded state growth, which in the case of the Flink runner is observable in the growth of checkpoint size.
> https://lists.apache.org/thread.html/rae268806035688b77646195505e5b7a56568a38feb1e52d6341feedd%40%3Cdev.beam.apache.org%3E
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