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https://issues.apache.org/jira/browse/FLINK-14553?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Piotr Nowojski closed FLINK-14553.
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> 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
> Priority: Minor
> Labels: pull-request-available
> Fix For: 1.10.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> 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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