Suppose you change a flag in jboss-service.xml in deploy/jbossweb-tomcat55.sar/META-INF, a redeploy of the tomcat 5 service happens.

You will notice the following Runtime Exception and the tomcat service fails to deploy.

==============================================================================================
13:33:30,421 INFO [Catalina] Initialization processed in 562 ms
13:33:30,421 INFO [StandardService] Starting service jboss.web
13:33:30,421 INFO [StandardEngine] Starting Servlet Engine: Apache Tomcat/5.5.1
7
13:33:30,453 INFO [StandardHost] XML validation disabled
13:33:30,468 INFO [Catalina] Server startup in 47 ms
13:33:30,468 WARN [ServiceController] Problem starting service jboss.web:service=WebServer
java.lang.IllegalArgumentException: Handler for key=javax.servlet.http.HttpServl
etRequest, exists, handler: org.jboss.web.tomcat.security.HttpServletRequestPolicyContextHandler@1bb03ee
at javax.security.jacc.PolicyContext.registerHandler(PolicyContext.java:185)
at org.jboss.web.tomcat.tc5.Tomcat5.startService(Tomcat5.java:467)
at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289)
at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:245)
at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
===================================================================================

Use the following api of PolicyContext in Tomcat5 service
http://java.sun.com/j2ee/1.4/docs/api/javax/security/jacc/PolicyContext.html#registerHandler(java.lang.String,%20javax.security.jacc.PolicyContextHandler,%20boolean)