启动zookeeper集群报错
java.net.NoRouteToHostException: No route to host (Host unreachable)
原因：防火墙没有关闭
执行关闭命令systemctl stop firewalld.service，之后正常启动
zookeeper启动失败原因：
zookeeper启动失败 Cannot open channel to 2 at election address **/*.*.*.*:3888 java.net.ConnectException_Kenneth_Chen_的博客-CSDN博客
