[DDF] This is only true for the session replication.

This is only true for the session replication.
Not sure about the EJB, server and hibernate container - this should be clarified.
In any case not true for customer caches if allowed.

I would expect if configured ASYNC the server would complain!

Reported by: rhn-support-wfink

https://access.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/7.4/html/configuration_guide/configuring_high_availability#annotations:f3bc467c-ff32-4f6e-bbb1-0f8ab1aed3d0