Bruno, you must have a dirty build in some way. This stuff is all compiling fine on CI etc + a change in return value shouldn't be causing a NoSuchMethodError. How are you running the build? What's your env etc? Do you have a classpath var set in your env? Try this (will take about 20 mins)... from the root of your ESB checkout (trunk)... "ant -f integration-build.xml integration" View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4099213#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...