if (ConfigHolder.getInstance().getLbConfig().getLoadBalancerConfig().getMbServerUrl() != null) {
// start consumer
// initialize TopologyBuilder Consumer
Thread topologyConsumer =
new Thread(new TopologySyncher(ConfigHolder.getInstance().getSharedTopologyDiffQueue()));
// start consumer
topologyConsumer.start();
TopologySubscriber.subscribe(TopologyConstants.TOPIC_NAME);