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https://issues.apache.org/jira/browse/FLINK-26592?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Roman Khachatryan resolved FLINK-26592.
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Fix Version/s: 1.15.0
Resolution: Fixed
Merged into master as db4d05a9c1bf63a56218d7bbfcc2b8e9978387e0,
into 1.15 as 543e8854b8f6b1e0b6997383de0691d2e9fffba7
> [Changelog] Deadlock in FsStateChangelogWriter
> ----------------------------------------------
>
> Key: FLINK-26592
> URL: https://issues.apache.org/jira/browse/FLINK-26592
> Project: Flink
> Issue Type: Bug
> Components: Runtime / State Backends
> Affects Versions: 1.15.0
> Reporter: Roman Khachatryan
> Assignee: Roman Khachatryan
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.15.0, 1.16.0
>
> Attachments: deadlock
>
>
> The issue occurs when sizes of buffers are set to minimum (e.g. 1 byte).
> Task thread tries to update state -> schedules to upload changes -> waits for
> capacity.
> Upload threads do release capacity on upload completion; however, they are
> unable to send back the results because the Writer lock is taken; therefore,
> they're unable to proceed with the next uploads.
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