metadata.clearUnsafe();
// DC1
metadata.updateNormalToken(new StringToken("A"), InetAddress.getByName("127.0.0.1"));
metadata.updateNormalToken(new StringToken("C"), InetAddress.getByName("127.0.0.2"));
// DC2
metadata.updateNormalToken(new StringToken("B"), InetAddress.getByName("127.0.0.4"));
metadata.updateNormalToken(new StringToken("D"), InetAddress.getByName("127.0.0.5"));
Map<String, String> configOptions = new HashMap<String, String>();
configOptions.put("DC1", "1");
configOptions.put("DC2", "1");