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https://issues.apache.org/jira/browse/FLINK-37642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17945262#comment-17945262
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Zakelly Lan commented on FLINK-37642:
-------------------------------------

[~zhourenxiang]

Well, it's no big deal for timers to be triggered before any callbacks. But 
this might be a nice improvement for yielding, with a sacrifice of delayed 
timer triggering.

> Use the mailboxExecutor for operator in Async state processing
> --------------------------------------------------------------
>
>                 Key: FLINK-37642
>                 URL: https://issues.apache.org/jira/browse/FLINK-37642
>             Project: Flink
>          Issue Type: Improvement
>          Components: Runtime / Async State Processing
>    Affects Versions: 2.0.0
>            Reporter: Zakelly Lan
>            Assignee: Yanfei Lei
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 2.1.0
>
>
> Currently, the operators of async state processing use the main mailbox 
> executor for callback execution, which has low priority. It's better to use 
> the one for `YieldingOperator`, as:
> {code:java}
>         MailboxExecutor mailboxExecutor =
>                 containingTask
>                         .getMailboxExecutorFactory()
>                         .createExecutor(configuration.getChainIndex());
> {code}
> It has higher priority, which could help us do efficient `yield()`.



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