I use the following code to flush the role, but I use the request.isUserInRole('Anonymous'), the result is still true:

 private void logout() throws Exception {

 String domainName = "EatOutDomain";

 MBeanServer server = (MBeanServer) MBeanServerFactory
 .findMBeanServer(null).get(0);
 String jaasMgrName= "jboss.security:service=JaasSecurityManager";
 ObjectName jaasMgr = new ObjectName(jaasMgrName);
 Object[] params = { domainName };
 String[] signature = { "java.lang.String" };
 List users = (List) server.invoke(jaasMgr,
 "getAuthenticationCachePrincipals", params, signature);

 for (int i = 0; i < users.size(); i++) {
 SimplePrincipal principal = (SimplePrincipal) users.get(i);


 Object[] pParams = { domainName, principal };
 String[] pSignature = { "java.lang.String", "java.security.Principal"};
 server.invoke(jaasMgr, "flushAuthenticationCache", pParams,
 pSignature);

There have only one principal "Anonymous" in domain, and I user getAuthenticationCachePrincipals to get the roles after call "flushAuthenticationCache", the prinipals all clearned.
But, I use the request.isUserInRole("Anonymous") the result is always is true.
How can I clean the request.isUserInRole()? And relogin into web site?