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  • 4.2.1 (experimental, deprecated) - Requires KRaft, please read on the Kraft migration guide.

  • 4.1.1 (experimental, deprecated) - Requires KRaft, please read on the Kraft migration guide.

  • 3.9.2 (LTS)

  • 3.9.1 (deprecated)

Support for clusters running in Kraft mode (which includes Apache Kafka 4.x.x) is experimental because it has not been thoroughly tested in production environments yet.

Also there are some known issues such as:

  • Controller scaling is not reliable.

  • Service exposition is not definitive.

  • Kerberos authentication for KRaft is implemented, unit-tested, and has been verified end-to-end against a live cluster (Kafka 4.2.1, 3 controller replicas); it has not yet been exercised across all supported versions in CI.