code: private void updateServerStart(UpdateServerHeartbeat update)
    {
      // internal communication is non-ssl
      boolean isSSL = false;
      
      ServerHeartbeat server = _root.createServer(update.getAddress(),
                                                  update.getPort(),
                                                  isSSL,
                                                  0,
                                                  getCluster());
      
      server.setDisplayName(update.getDisplayName());
      //server.setMachineHash(serverUpdate.getMachineHash());
  
      updateServer(server, update);
      
      if (server.getRack() != null) {
        server.getRack().update();
      }
    }
docs: Update a server where the update is directly from the peer.