[jira] [Created] (FLINK-21992) Investigate potential buffer leak in unaligned checkpoint

[Shang Yuanchun (Jira)]

Arvid Heise created FLINK-21992:
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             Summary: Investigate potential buffer leak in unaligned checkpoint
                 Key: FLINK-21992
                 URL: https://issues.apache.org/jira/browse/FLINK-21992
             Project: Flink
          Issue Type: Bug
    Affects Versions: 1.13.0
            Reporter: Arvid Heise


A user on mailing list reported that his job gets stuck with unaligned checkpoint enabled.
http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Source-Operators-Stuck-in-the-requestBufferBuilderBlocking-tt42530.html

We received two similar reports in the past, but the users didn't follow up, so it was not as easy to diagnose as this time where the initial report already contains many relevant data points.

Beside a buffer leak, there could also be an issue with priority notification.



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