Zakelly opened a new pull request, #25051:
URL: https://github.com/apache/flink/pull/25051
## What is the purpose of the change
The `OperatorSubtaskState` only make keyed state register with
`SharedStateRegistry`. However, the file-merging directories's handle are
wrapped in `FileMergingOperatorStreamStateHandle}` which is an
`OperatorStreamStateHandle`. That means the `#registerSharedStates` is never
called, so the registry(JM) will never know and delete the directories.
## Brief change log
- In `OperatorSubtaskState`, we register
`FileMergingOperatorStreamStateHandle`.
## Verifying this change
Modified tests in `SnapshotFileMergingCompatibilityITCase`.
## 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: yes
- 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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