gaoyunhaii opened a new pull request #16432:
URL: https://github.com/apache/flink/pull/16432
## What is the purpose of the change
This PR changes how checkpoint in OperatorCoordinator tracks the result of
the previously sent event to be that the failed events would be kept till it
has been processed (namely triggered failover for the corresponding subtasks).
Otherwise there might be event loses if there are checkpoints after fails to
sending event and the subtask failover due to the lost event won't be included
in these checkpoints.
## Brief change log
- 3f92e0cf1c13240efad8e5227ec2eec55cf6028d changes the event tracking logic.
## Verifying this change
*(Please pick either of the following options)*
This change can be verified by the added unit tests and by the manually test
with the failed cases.
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): **no**
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: **no**
- The serializers: **no**
- The runtime per-record code paths (performance sensitive): **no**
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn, ZooKeeper: **no**
- The S3 file system connector: **no**
## Documentation
- Does this pull request introduce a new feature? **no**
- If yes, how is the feature documented? **not applicable**
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