From the pom file of tomcat-catalina-ha, it depends on the tomcat-catalina. But one class HTMLManagerServlet in the tomcat-catalina has a reference to a class BackupManager in the tomcat-catalina-ha.  Is there a way to remove the recursive dependency between those two components ?
    By the way, there mightbe a NullPointerException issue while using the BackupManager in the HTMLManagerServlet.
    ---> line.523
     Manager manager = ctxt.getManager();
                if (manager instanceof BackupManager && showProxySessions) {
                    args[5] = new Integer(
                            ((BackupManager)manager).getActiveSessionsFull());
                } else if (ctxt.getManager() != null){
                    args[5] = new Integer(manager.getActiveSessions());
                } else {
                    args[5] = new Integer(0);
                }
    <---

Please also check the thread from
http://www.mail-archive.com/users@tomcat.apache.org/msg83188.html