I've added this line in server/xxx/deploy/jboss-web.deployer/conf/web.xml: <error-page> <error-code>404</error-code> /404.html </error-page> and added the 404.html file in ROOT.war, with partial success. http://host:8080/blablah - returns correct 404 page http://host:8080/app1/blablah - returns a blank page ... What might be causing the blank page? I don't see anything unusual in the log files ... hmm ... /-: KM View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4258699#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...