I don't know what studio 4 is. The java: context is visible only inside the jboss vm. If you want to see what is in jboss' jndi I recommend using the jndiview mbean. MBeans are not automatically related in any way to jndi, so unless you have specified something to be bound under java:/hsqldbDS you won't see it in jndiview either. The default hsqldb datasource is bound under java:/DefaultDS.