ifndef-SleePy opened a new pull request #8982: [FLINK-13098][datastream] Add a new type UNDEFINED of shuffle mode URL: https://github.com/apache/flink/pull/8982 ## What is the purpose of the change * This new shuffle type leaves some space for optimization later. The optimization might be based on resources or some global settings. ## Brief change log * The `UNDEFINED` type is the default value of shuffle mode. If there is no specific `PartitionTransformation`, the shuffle mode would be `UNDEFINED`. * The `UNDEFINED` shuffle mode can be chained ## Verifying this change * Modify the existing case to cover this ## 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): 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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