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Posted to dev@flink.apache.org by "Roman Khachatryan (Jira)" <ji...@apache.org> on 2022/03/10 22:16:00 UTC

[jira] [Created] (FLINK-26592) [Changelog] Deadlock in FsStateChangelogWriter

Roman Khachatryan created FLINK-26592:
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             Summary: [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
             Fix For: 1.16.0


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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