anonymous wrote : In the prior versions of JBoss it was not necessary to do that in order to work...do you know why the reason for that ? AFAIK, JBoss since 3.x needs them to be named as .war , .ear etc... for the respective deployers to identify what has to be deployed. I guess you are talking about Tomcat where you need not specify the .war extension View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3981652#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...