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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