The tmp directory is just a staging area for the contents of the WAR file. The app server cannot (or doesn't want to) work with files within an archive and therefore explodes the archive so that it can access the files directly. You could deploy your app as exploded in the deploy directory and then the tmp directory is not used. See http://wiki.jboss.org/wiki/Wiki.jsp?page=ExplodedDeployment. The main reason for the 404 error is that the URL entered is not being mapped correctly. Could you post the contents of your web.xml file? Be sure to embed the contents within [ code ]...[ /code ] brackets (without the spaces). You can select the contents and click the 'Code' button to do this. Also, post a URL that you think should work but results on a 404 error. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4068787#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...