1996fanrui opened a new pull request, #783:
URL: https://github.com/apache/flink-kubernetes-operator/pull/783
## What is the purpose of the change
JobVertexScaler#scale has a optimization: Try to adjust the parallelism such
that it divides the number of key groups without a remainder => data is evenly
spread across subtasks.
It's only useful when the upstream shuffle type has keyBy. We should avoid
this optimization when the upstream shuffle type doesn't have keyBy.
## Brief change log
[FLINK-34504][autoscaler] Avoid the parallelism adjustment when the upstream
shuffle type doesn't have keyBy
## Verifying this change
I'm developing the unit test.
## 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 changes to the `CustomResourceDescriptors`:
no
- Core observer or reconciler logic that is regularly executed: no
## Documentation
- Does this pull request introduce a new feature? no
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