I got similar problem, although it happened to my own mbeans. The mbean is loaded before the datasource is bound. Therefore the mbean keeps compaining about the datasource.
Anybody has any idea? I use jboss 4.0.2 but found the same thing on 4.0.1.
Exactly the same problem here. I'm not using a Hibernate .sar file. I've tried putting my hibernate-service.xml file inside a ".har" archive, exploded or not, with the same result.