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https://issues.apache.org/jira/browse/FLINK-13848?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16959721#comment-16959721
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Piotr Nowojski commented on FLINK-13848:
----------------------------------------

Have you thought how to resolve the issue from you previous comment (posted on  
30/Aug/19 04:52)? With triggering next "A" only after the previous "C" 
completes? 

Do I understand it correctly, that in the current code base this is not an 
issue, because all of the A, B and C are executed synchronously from one 
method? 

> Anyway it's no harm to enrich the {{MainThreadExecutor}}.

Kind of there is - having to maintain unused feature.

> Support “scheduleAtFixedRate/scheduleAtFixedDelay” in 
> RpcEndpoint#MainThreadExecutor
> ------------------------------------------------------------------------------------
>
>                 Key: FLINK-13848
>                 URL: https://issues.apache.org/jira/browse/FLINK-13848
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Runtime / Coordination
>            Reporter: Biao Liu
>            Assignee: Biao Liu
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.10.0
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> Currently the methods “scheduleAtFixedRate/scheduleAtFixedDelay" of 
> {{RpcEndpoint#MainThreadExecutor}} are not implemented. Because there was no 
> requirement on them before.
> Now we are planning to implement these methods to support periodic checkpoint 
> triggering.



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