noorall opened a new pull request, #25551:
URL: https://github.com/apache/flink/pull/25551
## What is the purpose of the change
Currently, the ExecutionVertexInputInfo describes the task's input through a
combination of a PartitionRange and a SubpartitionRange. However, in the case
of skewed join optimization, we need to split a group of data corresponding to
the specific key, which may result in a downstream task subscribing to multiple
combinations of PartitionRanges and SubpartitionRanges.
Therefore, we need to modify the ExecutionVertexInputInfo to describe the
input data as multiple combinations of PartitionRanges and SubpartitionRanges
to meet the requirements of the aforementioned scenario and improve Flink's
flexibility in describing the task's inputs.
## Brief change log
- Modify the description of the input in ExecutionVertexInputInfo.
- Modify the connect function for edges.
- Modify the InputGate creation logic of the network layer to adapt to
this change.
## 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: (yes / no / don't know)
## Documentation
- Does this pull request introduce a new feature? (no)
- If yes, how is the feature documented? (not documented)
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