How to set Development Mode on JBoss 5.1

In order to acomplish this you need to edit a web.xml file located at
/server/my-server/deployers/jbossweb.deployer/web.xml
and change development init-param to be true as follows:

This will recompile the .jsp files on the fly without a need to restart the server.

It is important to mention that a production environment should not have this set to true.