[jira] [Created] (FLINK-14553) Respect non-blocking output in StreamTask#processInput

[Shang Yuanchun (Jira)]

zhijiang created FLINK-14553:
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             Summary: Respect non-blocking output in StreamTask#processInput
                 Key: FLINK-14553
                 URL: https://issues.apache.org/jira/browse/FLINK-14553
             Project: Flink
          Issue Type: Sub-task
          Components: Runtime / Task
            Reporter: zhijiang
            Assignee: zhijiang
             Fix For: 1.10.0


The non-blocking output was introduced in FLINK-14396 and FLINK-14498 to solve the problem of handling the checkpoint barrier in the case of backpressure.

In order to make the whole process through, {{StreamInputProcessor}} should be allowed to process input elements if the output is also available.

The default core size of {{LocalBufferPool}} for {{ResultPartition}} should also be increased by 1 in order not to impact the performance in the new way, and this tiny memory overhead could be ignored in practice.



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