StefanRRichter opened a new pull request #9034: [FLINK-13063] Temporary fix for AsyncWaitOperator consistency problems. URL: https://github.com/apache/flink/pull/9034 ## What is the purpose of the change This PR is a temporary fix for the consistency problems with the `AsyncWaitOperator` that are described under FLINK-13063. This temporary fix works simply by deactivating all chaining for `AsyncWaitOperator`. ## Brief change log Set the chaining strategy in the constructor of `AsyncWaitOperator` to `NEVER` by default. ## Verifying this change This change is already covered by existing tests. I added an additional test that chaining is suppressed by default and also check that users could go back to the old (broken) behavior if they had to, by setting the chaining strategy manually on the operator. ## 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? (change and backwards compatibility)
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