Poorvankbhatia opened a new pull request, #26832:
URL: https://github.com/apache/flink/pull/26832
## What is the purpose of the change
This PR migrates DummySource and FailOnParallelExecutionSource in
ReactiveModeITCase from the deprecated legacy SourceFunction API to the modern
FLIP-27 Source API.
## Brief change log
- Removed DummySource class that implemented the deprecated SourceFunction
interface
- Removed FailOnParallelExecutionSource class that implemented the
deprecated RichParallelSourceFunction interface
## Verifying this change
This change is already covered by existing tests in ReactiveModeITCase:
- testScaleUpOnAdditionalTaskManager() - verifies reactive scaling up
works with new source
- testScaleDownOnTaskManagerLoss() - verifies reactive scaling down works
with new source
- testJsonPlanParallelismAfterRescale() - verifies job graph parallelism
updates correctly
- testScaleLimitByMaxParallelism() - verifies maxParallelism=1 constraint
is enforced
All tests pass, confirming the migration maintains the same behavior for
reactive scheduling functionality.
## 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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