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  1. Flink
  2. FLINK-21992

Fix availability notification in UnionInputGate

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      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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            • Assignee:
              AHeise Arvid Heise
              Reporter:
              AHeise Arvid Heise
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