When you deploy a package containing JSPs in JBoss, the JSPs are not recompiled.
Check if JBoss is in development or runtime mode. If it is in runtime mode (development = false), set the checkInterval to 60 seconds. This tells JBoss to check every 60 seconds and recompile all JSPs that have timestamps newer than the cached versions.
For more specifics see https://access.redhat.com/knowledge/solutions/19679
See snippet from server/default/deployers/jbossweb.deployer/web.xml
<init-param> <param-name>checkInterval</param-name> <param-value>60</param-value> </init-param> <init-param> <param-name>development</param-name> <param-value>false</param-value> </init-param>