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https://issues.apache.org/jira/browse/FLINK-14044?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arvid Heise updated FLINK-14044:
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Component/s: Runtime / Task
> Reducing synchronization in AsyncWaitOperator
> ---------------------------------------------
>
> Key: FLINK-14044
> URL: https://issues.apache.org/jira/browse/FLINK-14044
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / Task
> Reporter: Arvid Heise
> Priority: Major
>
> Currently, AsyncWaitOperator receives computed results from a user thread and
> puts it in {{StreamElementQueue}}. This queue is synchronized as the emitter
> thread pulls available elements in a blocking fashion. With the recent
> migration to mailbox model, these elements are then put into a letter to be
> outputted in the mailbox thread.
> If we directly send the results from the user thread to the mailbox, we can
> get rid of any synchronization as everything happens in the user thread. That
> will slim down the code heavily.
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