StephanEwen opened a new pull request #15429:
URL: https://github.com/apache/flink/pull/15429
## What is the purpose of the change
Removes the `state.backend.async` option and makes all state snapshots
asnchronous by default.
## Brief change log
- Removes the flag for async snapshots from the `HashMapStateBackend` and
related examples and tests. This code was not released before, so this change
is not breaking any backwards compatibility.
- Ignores the flag for async snapshots in the `MemoryStateBackend` and
`FsStateBackend` and always uses async snapshots. This change does not break
any API. Methods and constructors are changed to ignore the flag, JavaDocs
updated.
- Deprecates the `ConfigOption` for *state.backend.async*.
## Verifying this change
- Existing tests are adjusted.
-
## 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/Mesos, 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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