elon-X opened a new pull request, #24757: URL: https://github.com/apache/flink/pull/24757
## What is the purpose of the change Sources with watermark alignment get stuck once some subtasks finish, this PR solves this problem. ## Brief change log while some subtasks have been finished, the SourceOperator send Long.MAX_VALUE to SourceCoordinator, and SourceCoordinator checks whether subtasks have been finished before sending the event. ## Verifying this change This change added tests and can be verified as follows: - *org.apache.flink.streaming.api.operators.SourceOperatorAlignmentTest::testWatermarkAlignmentWhileSubtaskFinished()* - *org.apache.flink.runtime.source.coordinator.SourceCoordinatorAlignmentTest::testWatermarkAlignmentWhileSubtaskFinished()* ## 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, Kubernetes/Yarn, ZooKeeper: no - The S3 file system connector: no ## Documentation - Does this pull request introduce a new feature? no -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@flink.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org