wanglijie95 opened a new pull request #18715:
URL: https://github.com/apache/flink/pull/18715
## What is the purpose of the change
Currently, unspecified edges(partitioner == null) will be setted to FORWARD
when the parallelism of both upstream and downstream is -1. This may cause many
job vertices whose parallelism is not calculated based on data volume, but is
aligned with their upstream vertices' parallelism because of forward edges,
which is contrary to the original intention of our adaptive batch scheduler.
For this problem, we will convert the unspecfied edges between
OperatorChains to RESCALE edges(instead of FORWARD edges) after OperatorChains'
creation.
## Verifying this change
UT `ForwardForUnspecifiedPartitionerTest`
## 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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