Github user tabish121 commented on the issue:
https://github.com/apache/activemq-artemis/pull/2423
I'd say none of them are really the right way to go. I'd suggest your
organization create a custom broker plugin that does whatever protocol
violating things are acceptable to you and your team and not allow for the
inevitable issues that arise from violating the specification from being
dropped directly into the broker. You could also (if you really care about the
message user id no matching) reject incoming messages there are close the
connection of the offending client.
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