Maybe something did change between 7.1.2 builds because I have a working version of 7.1.2 snapshot, but for the 7.2.0 version I get this exception
18:08:10,657 TRACE [org.jboss.remoting.remote.server] (Remoting "vs420" read-1) Server received authentication request
18:08:10,657 TRACE [org.xnio.nio.selector] (Remoting "vs420" read-1) Beginning select on sun.nio.ch.EPollSelectorImpl@530ce397
18:08:10,657 TRACE [org.jboss.security.authentication.JBossCachedAuthenticationManager] (Remoting "vs420" task-3) Begin isValid, principal:SUPPORT, cache entry: org.jboss.securi
ty.authentication.JBossCachedAuthenticationManager$DomainInfo@5b7e62ad
18:08:10,658 TRACE [org.jboss.security.authentication.JBossCachedAuthenticationManager] (Remoting "vs420" task-3) Begin validateCache, info=org.jboss.security.authentication.JBo
ssCachedAuthenticationManager$DomainInfo@5b7e62ad;credential.class=java.lang.String@686231088
18:08:10,658 TRACE [org.jboss.security.authentication.JBossCachedAuthenticationManager] (Remoting "vs420" task-3) End validateCache, isValid=true
18:08:10,658 TRACE [org.jboss.security.authentication.JBossCachedAuthenticationManager] (Remoting "vs420" task-3) End isValid, true
18:08:10,658 TRACE [org.jboss.remoting.remote.server] (Remoting "vs420" task-3) Server sending authentication rejected (javax.security.sasl.SaslException: Callback handler invoc
ation failed [Caused by javax.security.auth.callback.UnsupportedCallbackException])