After installing the JDK, do a rpm -e ApacheJserv to remove it,
then re-install it with rpm -i ApacheJserv to reconfigure it with your
new Java Developement kit.
If you want to use the SUN-jsdk, replace the servlet-2.0.jar in the
wrapper.classpath - line in the file /etc/httpd/conf/jserv/jserv.properties
with the SUN jsdk. Get it from http://java.sun.com/products/servlet/.
Only JSDK 2.0 (Java Servlet Development Kit) is supported (_EXACTLY_
2.0).