wsry opened a new pull request #11786: [FLINK-17208][network] Reduce redundant data available notifications of PipelinedSubpartition URL: https://github.com/apache/flink/pull/11786 ## What is the purpose of the change There are three scenarios that may lead to redundant data available notifications for PipelinedSubpartition: 1. Add a new buffer after an event; 2. Finish the current subpartition; 3. Flush an event buffer. This commit reduces these redundant data available notifications. ## Brief change log - Reduce the data available notification mentioned above; - Add new test to verify the change. ## Verifying this change A new test is added to verify the change. ## 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/Mesos, 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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