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https://issues.apache.org/jira/browse/FLINK-12958?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16931358#comment-16931358
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Alex commented on FLINK-12958:
------------------------------
PR: [https://github.com/apache/flink/pull/9564]
> Integrate AsyncWaitOperator with mailbox
> ----------------------------------------
>
> Key: FLINK-12958
> URL: https://issues.apache.org/jira/browse/FLINK-12958
> Project: Flink
> Issue Type: Sub-task
> Components: Runtime / Task
> Reporter: Stefan Richter
> Priority: Major
> Labels: pull-request-available
> Time Spent: 40m
> Remaining Estimate: 0h
>
> Currently, the {{AsyncWaitOperator::processElement()}} is running in the main
> task thread and blocks in {{addAsyncBufferEntry()}} when adding a new element
> in the full {{StreamElementQueue}}.
> The blocking of the main task thread prevents progress of mailbox events
> handling. The approach via FLINK-13248 may help process the events while
> queue is full.
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