User:ANONYMOUS

The principal Kafka gives a connection that did not authenticate.

A PLAINTEXT listener, or an SSL listener without client authentication, names every client User:ANONYMOUS. ACLs written for real user names then do not match it, so its requests are denied unless an ACL allows it.

Related terms

• kafka-acl
• security-protocol

Certification courses

• CCDAK and CCAAK course and practice exams: Confluent Apache Kafka certifications