qiuyanjun888 opened a new pull request, #28504:
URL: https://github.com/apache/flink/pull/28504
## Summary
This PR updates `flink-avro-confluent-registry` to a newer Confluent Schema
Registry client and adds a focused regression test for Kafka 3.9.x OAuth
compatibility.
## Root Cause
`flink-avro-confluent-registry` still used
`io.confluent:kafka-schema-registry-client:7.5.3`. With Kafka client 3.9.x on
the classpath, the Schema Registry OAuth bearer path can fail during client
initialization because Confluent 7.5.3 calls the old `HttpAccessTokenRetriever`
constructor signature that is no longer present in Kafka 3.9.x.
## Changes
- Upgrade `io.confluent:kafka-schema-registry-client` from `7.5.3` to
`7.9.8`.
- Add a test-scoped Kafka 3.9.2 dependency for compatibility validation.
- Add a focused regression test that initializes the Schema Registry OAuth
bearer credential path with Kafka 3.9.2 on the test classpath.
## Validation
- Added RED regression coverage:
- `./mvnw -pl flink-formats/flink-avro-confluent-registry
-Dtest=CachedSchemaCoderProviderTest#testThatOauthBearerAuthIsCompatibleWithKafkaClient39
test -DskipITs -Drat.skip=true -Dcheckstyle.skip=true`
- Fails before the dependency upgrade with `NoSuchMethodError` from
`OauthCredentialProvider.getTokenRetriever(...)`.
- Verified GREEN after the upgrade:
- `./mvnw -pl flink-formats/flink-avro-confluent-registry
-Dtest=CachedSchemaCoderProviderTest#testThatOauthBearerAuthIsCompatibleWithKafkaClient39
test -DskipITs -Drat.skip=true -Dcheckstyle.skip=true`
- Ran the module test suite:
- `./mvnw -pl flink-formats/flink-avro-confluent-registry test -DskipITs`
- Result: 28 tests, 0 failures, 0 errors; checkstyle and spotless clean.
- Verified the final dependency tree includes:
- `io.confluent:kafka-schema-registry-client:7.9.8`
- `org.apache.kafka:kafka-clients:3.9.2` in test scope.
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): yes
- 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
---
##### Was generative AI tooling used to co-author this PR?
- [X] Yes, Hermes Agent with OpenAI GPT-5.5
Generated-by: Hermes Agent (OpenAI GPT-5.5)
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