tillrohrmann opened a new pull request #9837: [FLINK-14315] Make heartbeat manager fields non-nullable URL: https://github.com/apache/flink/pull/9837 ## What is the purpose of the change This commit introduces the `NoOpHeartbeatManager` which can be used to initialize an unset heartbeat manager field. This allows to make the heartbeat manager fields non-nullable which in turn avoids NPE. Moreover, this commit makes the heartbeat manager fields of the `TaskExecutor` final. ## Verifying this change This change is a trivial rework / code cleanup without any test coverage. ## 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, 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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