Hello! We are running into the same problem. The JVM runs out of memory and heap analysis shows huge HashSets containing entries like "JBossWS_..._20342.xsd". Following the path to GC root shows that resourceBlackList in the unified classloader holds references to these hashmaps. We are running JBoss AS 4.2.2.GA with JBossWS 3.0.1-native-2.0.4.GA and cannot upgrade to JBoss AS 5, so more information on this problem would be greatly appreciated. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4247639#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...