AHeise opened a new pull request #9383: WIP [FLINK-13248][runtime] Adding processing of downstream messages in AsyncWaitOperator's wait loops URL: https://github.com/apache/flink/pull/9383 ## What is the purpose of the change * This PR addresses a kind of live lock that appears when chained AsyncWaitOperators block the processing of mailbox events. ## Brief change log * Exposed mailbox in StreamBox through a getter * Added method to process one downstream message in StreamBox * Using the newly added methods in the AsyncWaitOperators wait loops. ## Verifying this change Test needs to be added. ## 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)`: yes - The serializers: no - The runtime per-record code paths (performance sensitive): yes - 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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