I've been trying to get Tomcat to use Jikes instead of javac as its Java compiler for JSP pages. All the information I've found says to edit the conf/web.xml file. As far as I could tell, this did nothing, so I poked around the sources. According to 'WebXmlReader.java' (in 3.2.1): // We may read a "default" web.xml from INSTALL/conf/web.xml - // the code is commented out right now because we want to // consolidate the config in server.xml ( or API calls ), // we may put it back for 3.2 if needed. // note that web.xml have to be cleaned up - only diff from // default should be inside // readDefaultWebXml( ctx ); so it appears that conf/web.xml is no longer read. However, adding <servlet> <servlet-name> jsp </servlet-name> <servlet-class> org.apache.jasper.servlet.JspServlet </servlet-class> <init-param> <param-name>jspCompilerPlugin</param-name> <param-value>org.apache.jasper.orgpiler.JikesJavaCompiler</param-value> </init-param> <load-on-startup> -2147483646 </load-on-startup> </servlet> <servlet-mapping> <servlet-name> jsp </servlet-name> <url-pattern> *.jsp </url-pattern> </servlet-mapping> (basically, the jsp servlet definition and mapping from conf/web.xml) into my webapp's 'web.xml' file seems to do the trick. Is there a way of doing this now without altering my webapp? I'd like to make this mapping the default rather then the standard JavaC mapping. Does this require writing a WebXmlReader replacement? Yair