You probably have not configured classloader isolation for those 2 EARs. Create a jboss-app.xml (if you don't have one, already) for both these EARs. The jboss-app.xml needs to be placed in the META-INF folder of the EARs. The contents of that file should be something like this: EAR1: <jboss-app> | <loader-repository> | org.myapp:loader=myEAR | <loader-repository-config> | java2ParentDelegation=false | </loader-repository-config> | </loader-repository> | | | | </jboss-app> | For the other EAR, the jboss-app.xml contents will be similar except a unique name for the classloader EAR2: <jboss-app> | <loader-repository> | org.myapp:loader=myOtherEAR | <loader-repository-config> | java2ParentDelegation=false | </loader-repository-config> | </loader-repository> | | | | </jboss-app> | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4146474#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...