JingGe opened a new pull request #17656:
URL: https://github.com/apache/flink/pull/17656
## What is the purpose of the change
The FileRecordFormat and StreamFormat have too much commons. This makes user
confused. The main motivation for removing it is the inherent design flaw in
the batching of FileRecordFormat: StreamFormat can guarantee that only a
certain amount of memory is being used (unless a single record exceeds that
already), but FileRecordFormat can only batch by the number of records. By
removing FileRecordFormat, we relay the responsibility of implementing the
batching to the format developer; they need to use BulkFormat and find a better
way than batch by number of records.
## Brief change log
- marked FileRecordFormat and FileRecordFormatAdapter as @Deprecated.
- refactored the relevant usages.
- updated javadoc.
## Verifying this change
This change only marked some classes as deprecated and update relevant
comments without any test coverage.
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (yes / **no**)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: (**yes** / no)
- The serializers: (yes / **no** / don't know)
- The runtime per-record code paths (performance sensitive): (yes / **no**
/ don't know)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (yes / **no** / don't
know)
- The S3 file system connector: (yes / **no** / don't know)
## Documentation
- Does this pull request introduce a new feature? (yes / **no**)
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