pnowojski opened a new pull request #11467: [FLINK-16317][operators] Provide support for watermarks, key selector and latency marker in MultipleInputStreamOperator URL: https://github.com/apache/flink/pull/11467 This PR is based on https://github.com/apache/flink/pull/11403/ so please ignore couple of first commits. This PR adds support for watermarks, key selector and latency markers in MultipleInputStreamOperator. ## Brief change log Please check individual commit messages. ## Verifying this change This change added some unit and integration tests. ## 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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