I'm trying to create a webservice that returns a bean containing a collection. Something like this: @WebService class Service { A getA(); } class A { public Collection getX(); }; class B { .. }; I get the following in JBoss log (running 4.0.5): JAX-RPC does not allow collection types skipping: X I searched the JAXB specs as JAX-WS delegates xml encoding to JAXB, but I either could not understand or find anything about collections. The JAXB API docs suggests that it should be handled. Any ideas? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4043138#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...