我再测试mysql cluster高可用性时，直接关掉一台数据节点的主机，等几秒钟重新查询mysql集群状态就会有如下报错，且所有的数据节点和sql节点全部断开。有没有大神知道的，帮忙解答下，谢谢。
Node 3: Forced node shutdown completed. Caused by error 2305: 'Node lost connection to other nodes and can not form a unpartitioned cluster, please investigate if there are error(s) on other node(s)(Arbitration error). Temporary error, restart node'.
