Currently I try to run/deploy a war file in JBoss AS 5.0.0.GA that contains pre-compiled JSPs. Unfortunately I get some strange errors, I don't get rid off. Below you can find some details about my activities. If anyone has an idea of the problem cause - I am very interested in the solution. Best regards pkx 1.) JSP pre compilation with jspc-maven-plugin:2.0.-alpha3 using tomcat6 compiler as described on http://mojo.codehaus.org/jspc/jspc-maven-plugin/usage.html. --> resulting war file looks fine, JSP's and web.xml are all available 2.) JBoss AS deploys this war file successfully 3.) When the web application is accessed, a ClassNotFoundException is thrown: java.lang.ClassNotFoundException: org.apache.jasper.runtime.AnnotationHelper from BaseClassLoader@35b4548f{VFSClassLoaderPolicy@521b93d4{name=vfszip:/Applications/jboss/jboss-5.0.0.GA/server/default/deploy/mywar-1.5-SNAPSHOT.war 4.) If I add the missing classes to war file, the deployment of the web application fails. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4255340#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...