1. 场景：先分别安装两个master在node7、node8服务器上，然后运行，接着再停掉master服务。最后在node3服务器安装master服务,分别修改在每个节点的master.gflagfile文件--master_addresses=node7,node8,node9，再将node7、node8、node9上的master服务开启，报了以下异常：
Unable to init master catalog manager: Invalid argument: Unable to initialize catalog manager: Failed to initialize sys tables async: on-disk master list (node7:7051, node8:7051, node9:7051)
and provided master list (node7:7051, node8:7051) differ. Their symmetric difference is: node9:7051
解决：还未找到原因。