Hi! To run JBoss AOP in hotswap mode, you need to pass the -hotSwap option to the jdk50 agent: $ java -cp=<classpath as described above> -Djboss.aop.path=<path to jboss-aop.xml> \ | -javaagent:jboss-aop-jdk50.jar=-hotSwap com.blah.MyMainClass To see more on this, refer to the Reference Manual, item 11.2.3 (HotSwap) However, we don't advise the usage of this feature since we have some issues with the jvm that need to be solved. Fortunately, hotswap is not the only way to interweave aspects into already loaded classes. You can do this using anyone of the weaving modes. You just need to follow the dynamicAOP example of our tutorial. Notice that this example should work on all modes, including loadtime weaving with hotswap enabled. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4088835#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...