" Remote connection failed: javax.security.sa sl.SaslException: Authentication failed: all available authentication mechanisms" failed appears randomally

Hello everybody and JBoss guys.

Very simple and critical issue.

Our system runs Grails app which is an EJB Client.
Randomally it gots
[Remoting "config-based-ejb-client-endpoint" read-1] ERR
OR remote.connection - JBREM000200: Remote connection failed: javax.security.sa
sl.SaslException: Authentication failed: all available authentication mechanisms
failed
java.lang.IllegalStateException: No EJB receiver available for handling blablabla.

Just to make myself clear- same code, same place, same connection, everything is reproducable when client and server are on the same PC: sometimes EJB invocation works and sometimes raises this "
[Remoting "config-based-ejb-client-endpoint" read-1] ERR
OR remote.connection - JBREM000200: Remote connection failed: javax.security.sa
sl.SaslException: Authentication failed: all available authentication mechanisms
failed
java.lang.IllegalStateException: No EJB receiver available for handling blablabla.

Seems this is a showstopper issue, what do you think about?