membership: [192.168.0.2:6666, 192.168.0.2:7777, 192.168.0.2:5555, 192.168.0.2:8888]
sorted: [192.168.0.2:5555, 192.168.0.2:6666, 192.168.0.2:7777, 192.168.0.2:8888]