安装zookeeper-3.4.6的时候，启动正常没报错，但zkServer.sh status查看状态的时候却出现错误，如下：
JMX enabled by default
Using config: /hadoop/zookeeper/bin/../conf/zoo.cfg
Error contacting service. It is probably not running.
安装zookeeper-3.4.6的时候，启动正常没报错，但zkServer.sh status查看状态的时候却出现错误，如下：
JMX enabled by default
Using config: /hadoop/zookeeper/bin/../conf/zoo.cfg
Error contacting service. It is probably not running.