KIP-1320 — Deprecate heavily used internal APIs

Discussion Client

Defines a staged deprecation process for classes Kafka maintainers confirm are internal yet widely imported externally, adding a compiler deprecation warning and a stated removal release, starting with `org.apache.kafka.common.utils.Utils`. KIP-1265's `@InterfaceAudience` annotation and checker mark such classes Private but produce no javac warning and no removal schedule, and cannot distinguish a genuinely internal helper from one accidentally missing a Public annotation.

Protocol Impact

Produce · Fetch · ListOffsets · Metadata · OffsetCommit · OffsetFetch · FindCoordinator · JoinGroup · LeaveGroup · ApiVersions · CreateTopics · OffsetForLeaderEpoch · CreatePartitions

Details