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https://issues.apache.org/jira/browse/FLINK-14971?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Piotr Nowojski closed FLINK-14971.
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Resolution: Fixed
Merged as 874310f68a..6936713b3b
> Make all the non-IO operations in CheckpointCoordinator single-threaded
> -----------------------------------------------------------------------
>
> Key: FLINK-14971
> URL: https://issues.apache.org/jira/browse/FLINK-14971
> Project: Flink
> Issue Type: Sub-task
> Components: Runtime / Checkpointing
> Reporter: Biao Liu
> Assignee: Biao Liu
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.11.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Currently the ACK and declined message handling are executed in IO thread.
> This is the only rest part that non-IO operations are executed in IO thread.
> It blocks introducing main thread executor for {{CheckpointCoordinator}}. It
> would be resolved in this task.
> After resolving the ACK and declined message issue, the main thread executor
> would be introduced into {{CheckpointCoordinator}} to instead of timer
> thread. However the timer thread would be kept (maybe for a while
> temporarily) to schedule periodic triggering, since FLINK-13848 is not
> accepted yet.
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