ifndef-SleePy opened a new pull request #9956: [FLINK-13848][runtime] Enriches RpcEndpoint.MainThreadExecutor by supporting periodic scheduling URL: https://github.com/apache/flink/pull/9956 ## What is the purpose of the change * Enriches `RpcEndpoint.MainThreadExecutor` by supporting periodic scheduling. So that `CheckpointCoordinator` could schedule triggering periodically through main thread executor ## Brief change log * Refines `ScheduledFutureTask` from `ActorSystemScheduledExecutorAdapter` * It would be used both in `ActorSystemScheduledExecutorAdapter` and `MainThreadExecutor` * Adds tests for `ActorSystemScheduledExecutorAdapter` * Unifies the `ScheduledFutureAdapter` with `ScheduledFutureTask` * Removes dead code `ScheduledFutureAdapter` * Supports periodic scheduling in `MainThreadExecutor` ## Verifying this change * This change added tests ## 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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