//use a Node Locator to connect to the cluster
LiveNodeLocator nodeLocator = configuration.getBackupGroupName() == null?
new AnyLiveNodeLocator(quorumManager):
new NamedLiveNodeLocator(configuration.getBackupGroupName(), quorumManager);
serverLocator0.addClusterTopologyListener(nodeLocator);
nodeLocator.connectToCluster(serverLocator0);
serverLocator0.addInterceptor(new ReplicationError(HornetQServerImpl.this, nodeLocator));
nodeManager.startBackup();