After the unsuccessful authentication we log (1) the authentication exception stacktrace on the WARN level. This upsets users, because we pollute the logs with the alarming stacktraces.

Can we consider logging only message on the WARN level and logging full stacktrace only on the DEBUG level?

(1) https://github.com/apache/activemq/blob/00921f22ff9a8792d7663ef8fadd4823402a6324/activemq-broker/src/main/java/org/apache/activemq/broker/TransportConnection.java#L815