项目中使用zookeeper注册集群时，遇到无法连接到zookeeper注册中心
都是小问题。
<dubbo:registry address="zookeeper://192.168.1.217:2181?backup=192.168.1.216:2182,192.168.1.218:2183"/>
一 . org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss二 . /usr/zookeeper/zookeeper-node-2/bin/../conf/zoo.cfg Error contacting service. It is probably not running.
解决：1：关闭主机防火墙；
2：注释下面红框中的哪一行
