Hi,I'm working with Jboss 2 years ago,first with Jboss 4.0.2 wich I configured to work with CallbyValue to true working in this way I didn't have problems with OutOfMemory Perm gen errors ,but reading the recomendations I let the default configuration to the default values (callbyvalue to false) as a result of it if I deploy the ear file of my application five times the server throw an perm gen java.lang.OutOfMemory error I tested with 4.0.2 and 4.0.5GA having the same problems. Now I back to callbyValue to true and I don't have problems of Perm gen OutOfMemory. the application use Struts,Spring for service tier and Hibernate. Could somebody explainme what is the cause or I don't understand this: http://wiki.jboss.org/wiki/Wiki.jsp?page=ClassLoadingConfiguration Thanks View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4043916#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...