PatrickRen opened a new pull request, #20760:
URL: https://github.com/apache/flink/pull/20760
## What is the purpose of the change
This pull request adds IdlenessManager for main and per-split output in
source operator to mark idleness only if both output are idle
## Brief change log
- Add IdlenessManager for main and per-split output in source operator to
mark idleness only if both output are idle
- Improve WatermarksWithIdleness to avoid sending idleness event repeatedly
on idle
- Migrate SourceOperatorEventTimeTest to JUnit 5 style
## Verifying this change
This change added tests and can be verified as follows:
- SourceOperatorEventTimeTest#testMainAndPerSplitWatermarkIdleness, that
validates the reader output is marked as idle only if both main and per-split
source are idle
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (yes / **no**)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: (yes / **no**)
- The serializers: (yes / **no** / don't know)
- The runtime per-record code paths (performance sensitive): (yes / **no**
/ don't know)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (yes / **no** / don't
know)
- The S3 file system connector: (yes / **no** / don't know)
## Documentation
- Does this pull request introduce a new feature? (yes / **no**)
- If yes, how is the feature documented? (**not applicable** / docs /
JavaDocs / not documented)
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