Zookeeper错误2_zookeeper Error contacting service. It is probably not running异常2

因为实验需要，重启zookeeper，此时我只将虚拟机Slave1打开，进行启动，发现出现：

zookeeper Error contacting service. It is probably not running错误。

[root@Slave1 bin]# sh zkServer.sh status
JMX enabled by default
Using config: /usr/local/zookeeper/bin/../conf/zoo.cfg
Error contacting service. It is probably not running.

后来寻找原因，将三台机器Slave1，Slave2，Slave3都启动，发现这次显示成功：

JMX enabled by default
Using config: /usr/local/zookeeper/bin/../conf/zoo.cfg
Mode: follower

详细的操作过程如下：

[root@Slave1 bin]# sh zkServer.sh start
JMX enabled by default
Using config: /usr/local/zookeeper/bin/../conf/zoo.cfg
Starting zookeeper ... already running as process 110635.
[root@Slave1 bin]# sh zkServer.sh status
JMX enabled by default
Using config: /usr/local/zookeeper/bin/../conf/zoo.cfg
Mode: follower[root@Slave1 bin]# sh zkServer.sh stop
JMX enabled by default
Using config: /usr/local/zookeeper/bin/../conf/zoo.cfg
Stopping zookeeper ... STOPPED
[root@Slave1 bin]# sh zkServer.sh start
JMX enabled by default
Using config: /usr/local/zookeeper/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
[root@Slave1 bin]# sh zkServer.sh status
JMX enabled by default
Using config: /usr/local/zookeeper/bin/../conf/zoo.cfg
Error contacting service. It is probably not running.
[root@Slave1 bin]#

备注：还应该查看防火墙是否关闭，在root用户下关闭防火墙：service iptables stop