This issue was initially discussed in XB forums http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4099492#... The testcase is very simple and is in the mc testsuite package org.jboss.test.beaninfo.test; public class BeanInfoUnitTestCase extends AbstractBeanInfoTest public void testGenericInterfaceImpl() throws Throwable During the metadata discussion we decided it was a bug in the BeanInfo API. I haven't created a Jira issue for this yet though. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4099857#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...