With the update from Artemis 1.5.x to 2.6.x in WFLY-9407, Proton-J wasn't updated from 0.16.x to 0.27.3, which leads to class not found exceptions for "Sasl... " classes when remote acceptors are created and connected to (I tested with AMQP protocol). When updating Proton-J to the newest version (0.29.0) my issues are gone.

I'm not sure which other modules are using the proton-j module, but my suggestion is that we bump the version of Proton-j to the required 0.27.3 minimally.