wanglijie95 opened a new pull request #18050:
URL: https://github.com/apache/flink/pull/18050
## What is the purpose of the change
Support flexible number of subpartitions in IntermediateResultPartition.
When the consumer parallelism is decided, number of subpartitions should be
the **parallelism** of consumer job vertex(all to all). When the consumer
parallelism is not decided, number of subpartitions should be the **max
parallelism** of consumer job vertex.
## Brief change log
5e36ba1eacf427ca4665de18b6f71253fb53f0e8 Support flexible number of
subpartitions in IntermediateResultPartition.
## Verifying this change
Unit tests.
## 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**)
- If yes, how is the feature documented? (**not applicable**)
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