Distribute DynaCache Replication Sample Web Application

I wanted to see how the distributed Session works so i created this DistributedCacheReplication.war file. This Web Application has a simple DynaCacheReplicationSampleServlet servlet like this

public class DynaCacheReplicationSampleServlet extends HttpServlet {
 private static final long serialVersionUID = 1L;
  
    private DistributedMap distributeMap; 
 public void init() throws ServletException {
  super.init();
  System.out.println("Entering DynaCacheReplicationSampleServlet.init()");
  try {
  
   Context ctx = new InitialContext();
   System.out.println("Before getting the distributedMap");
   distributeMap =(DistributedMap) ctx.lookup("services/cache/distributedmap");
   System.out.println("After getting the distributedMap " + distributeMap);
  } catch (NamingException e) {
   e.printStackTrace(System.out);
  }
  System.out.println("Exiting DynaCacheReplicationSampleServlet.init()");
 }
 
 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  System.out.println("Entering DynaCacheReplicationSampleServlet.doGet() " );
  
  String serverName = (String)distributeMap.get("serverName");
  System.out.println("Server Name " + serverName);
  if(serverName == null){
   System.out.println("Server Name is empty. Adding data to distributedMap");
   serverName = ServerName.getDisplayName() + new Date();
   distributeMap.put("serverName", serverName);
  }
  response.setContentType("text/html");
  response.getWriter().println("Server Name from Distribute Cache " + serverName +"
 ");
  response.getWriter().println("Server Display Name " + ServerName.getDisplayName() +"
 ");
  response.getWriter().println("Server Full Name " + ServerName.getFullName() +"
 ");
  response.getWriter().println("Server Id " + ServerName.getServerId() +"
 ");

  System.out.println("Exiting DynaCacheReplicationSampleServlet.doGet()");
 }
}

I did deploy this application on my cluster and then i tried Hitting the servlet on first server followed by second server. On both of them i should have got same data but somehow my DynaCache replication is not working, i need debug it further