I've been testing out the native docker image and I notice that it seems to not work with the most simple authentication scheme - sasl plain.
KAFKA-19584<https://issues.apache.org/jira/browse/KAFKA-19584> from August 2025 describes the issue I'm seeing - the SaslServerAuthenticator fails with "java.lang.UnsupportedOperationException: Unable to find suitable Subject#doAs or Subject#callAs implementation at". I am sending the mail to check if people are aware of the issue - to me it sounds like a potential blocker for the native image that is advertised as suitable for non-prod scenarios and testing — almost all non-prod scenarios ought to be secured, and it seems like the image has a critical bug in that path. Best, Stan
