becketqin opened a new pull request #12507:
URL: https://github.com/apache/flink/pull/12507
## What is the purpose of the change
The `AddSplitsEvent` contains a list of `SourceSplit` to be sent from the
source coordinator to the source reader. Currently the `AddSplitsEvent` is a
serializable but the `SourceSplit` is not serializable as we expect the users
to provide a split serializer. In order to make sure the `AddSplitsEvent` is
serializable, we need to use the user provided split serializer to save the
serialized splits in the `AddSplitsEvent` instead of having the split objects.
## Brief change log
90d421fc94e29c0af0fa563661b9dd8f2a388b1b changes the `AddSplitsEvent` to
save the serialized splits instead of the original instance.
## Verifying this change
Existing unit tests covers the change.
## 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/Mesos, 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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