KRaft - Apache Kafka Without ZooKeeper SASL_SSL failed due to authentication error

[mmuehlbeyer]

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Self-hosted Kafka with KRaft, SSL and SASL (scram-sha-256)

Hello, I’m building a fresh Kafka cluster, and I’m stuck with getting SASL_SSL working with SCRAM-SHA-256, in KRaft mode. I’ve tried v3.5.1 and v3.6.0 from tarball from Apache website (with binary built on on Scala 2.13), and RPM confluent-server-7.5.0. Both Kafka servers produce the same error on each host when I start my 3 nodes: [2023-10-12 10:55:21,909] INFO [SocketServer listenerType=CONTROLLER, nodeId=1] Failed authentication with /10.0.0.2 (channelId=10.0.0.1:9093-10.0.0.2:42552-8) (err…