yunfengzhou-hub opened a new pull request, #23927:
URL: https://github.com/apache/flink/pull/23927
## What is the purpose of the change
This pull request adds support for consuming multiple subpartitions in a
single input channel.
## Brief change log
- Separate the notion of subpartition and channel in terms of naming,
signature and comments.
- Union the output from multiple subpartitions with one
ResultSubpartitionView and TierConsumerAgent
- Control the partial record split logic when writing buffers into
subpartition to avoid potential deadlocks
## Verifying this change
This change added tests and can be verified as follows:
- Extended HybridShuffleITCase to cover cases when the feature proposed in
this PR comes into effect.
- Added unit tests for newly introduced options and classes
- Manually verified situations that are not covered by e2e tests, like when
tiered hybrid shuffle uses sort buffer.
## 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: yes
- The runtime per-record code paths (performance sensitive): yes
- 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? yes
- If yes, how is the feature documented? no need to document
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