tillrohrmann opened a new pull request #11313: [FLINK-16373] Make JobManagerLeaderListener thread safe URL: https://github.com/apache/flink/pull/11313 ## What is the purpose of the change The JobManagerLeaderListener used by the JobLeaderService was not thread safe. Stopping the listener while notifying a new leader could lead to an IllegalStateException where the rpcConnection which was supposed to be started was concurrently closed by the stop call. ## Verifying this change * Added `JobLeaderServiceTest.handlesConcurrentJobAdditionsAndLeaderChanges`. ## 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/Mesos, ZooKeeper: (yes) - 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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