mux.HandleFunc("/debug/pprof/profile", s.handlePprofProfile)
		mux.HandleFunc("/debug/pprof/symbol", s.handlePprofSymbol)
		mux.HandleFunc("/debug/pprof/trace", s.handlePprofTrace)
	}
	mux.HandleFunc("/debug/ndsz", s.handleNdsz)

	l, err := net.Listen("tcp", fmt.Sprintf(":%d", s.statusPort))
	if err != nil {
		log.Errorf("Error listening on status port: %v", err.Error())
		return
	}
	// for testing.
	if s.statusPort == 0 {

				listeners = append(listeners, ll)
			}
			a.handleLDS(listeners)
		case v3.ClusterType:
			clusters := make([]*cluster.Cluster, 0, len(msg.Resources))
			for _, rsc := range msg.Resources {
				valBytes := rsc.Value
				cl := &cluster.Cluster{}
				_ = proto.Unmarshal(valBytes, cl)
				clusters = append(clusters, cl)
			}
			a.handleCDS(clusters)
		case v3.EndpointType: