[jira] [Created] (FLINK-8523) Stop assigning floating buffers for blocked input channels in exactly-once mode

[Shang Yuanchun (Jira)]

zhijiang created FLINK-8523:
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             Summary: Stop assigning floating buffers for blocked input channels in exactly-once mode
                 Key: FLINK-8523
                 URL: https://issues.apache.org/jira/browse/FLINK-8523
             Project: Flink
          Issue Type: Sub-task
          Components: Network
    Affects Versions: 1.5.0
            Reporter: zhijiang
            Assignee: zhijiang


In exactly-once mode, the input channel is set blocked state when reading barrier from it. And the blocked state will be released after barrier alignment or cancelled.

 

In credit-based network flow control, we should avoid assigning floating buffers for blocked input channels because the buffers after barrier will not be processed by operator until alignment.

To do so, we can fully make use of floating buffers and speed up barrier alignment in some extent.



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