Biao Liu created FLINK-13904:
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Summary: Avoid competition between different rounds of checkpoint
triggering
Key: FLINK-13904
URL: https://issues.apache.org/jira/browse/FLINK-13904
Project: Flink
Issue Type: Sub-task
Components: Runtime / Coordination
Reporter: Biao Liu
Fix For: 1.10.0
As a part of {{CheckpointCoordinator}} refactoring, I'd like to simplify the
concurrent triggering logic.
The different rounds of checkpoint triggering would be processed sequentially.
The final target is getting rid of timer thread and {{triggerLock}}.
Note that we can't avoid all competitions of triggering for now. There is still
a competition between normal checkpoint triggering and savepoint triggering. We
could avoid this competition by executing triggering in main thread. But it
could not be achieved until all blocking operations are handled well in IO
threads.
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