liuml07 opened a new pull request, #28175:
URL: https://github.com/apache/flink/pull/28175
## What is the purpose of the change
**This backports PR #28149 to `release-2.1` for FLINK-39672**
Java records have been supported as POJO types since Flink 1.19
(FLINK-32380), but the only doc mention lived on the release-1.20
java_compatibility page and was inadvertently removed on master by FLINK-37339.
## Brief change log
- Restores the FLINK-32380 reference under "Java 17" in
java_compatibility.md and notes that records are handled as POJO types
serialized via their canonical constructor.
- Adds a note in both POJO listings in types_serialization.md that a public
record class is serialized by PojoSerializer; the no-argument constructor and
getter/setter requirements do not apply.
- Mentions in schema_evolution.md that records follow the same POJO schema
evolution rules.
Parallel updates in docs/content.zh.
## Verifying this change
Doc-only change.
## 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**)
- If yes, how is the feature documented? (**not applicable** / docs /
JavaDocs / not documented)
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