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https://issues.apache.org/jira/browse/BEAM-10691?focusedWorklogId=470681&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-470681
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ASF GitHub Bot logged work on BEAM-10691:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 14/Aug/20 12:53
Start Date: 14/Aug/20 12:53
Worklog Time Spent: 10m
Work Description: je-ik commented on pull request #12551:
URL: https://github.com/apache/beam/pull/12551#issuecomment-674059727
@mxm I think I figured it out. The current commit
https://github.com/apache/beam/pull/12551/commits/fe75b7e01d55a0c24486b032330d26d66b57f9c2
works for my pipeline. I think the explanation is that the pipeline was not
really completely stuck, only so slow, it looked like that.
PriorityQueue#remove(Object) has O(N) complexity and when there is really many,
many, many timers (with nearly the same output timestamp), it would cause the
Pipeline to stop running.
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Issue Time Tracking
-------------------
Worklog Id: (was: 470681)
Time Spent: 5h 10m (was: 5h)
> FlinkRunner: pipeline might get stuck due to timer watermark hold not being
> released
> ------------------------------------------------------------------------------------
>
> Key: BEAM-10691
> URL: https://issues.apache.org/jira/browse/BEAM-10691
> Project: Beam
> Issue Type: Bug
> Components: runner-flink
> Affects Versions: 2.23.0, 2.24.0
> Reporter: Jan Lukavský
> Assignee: Jan Lukavský
> Priority: P1
> Time Spent: 5h 10m
> Remaining Estimate: 0h
>
> Pipeline might stop progressing watermark in certain cases due to timer
> output timestamp not being released from
> FlinkTimerInternals#outputTimestampQueue. The pipeline has to be restarted
> from checkpoint to reload the cache and free watermark hold.
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