zookeeper集群无法查看状态报错与解决

现象：查看状态

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

再次查看具体详细日志信息

[root@localhost logs]# cat /data/ota_soft/zookeeper/logs/zookeeper.out 
2020-07-24 10:51:20,713 [myid:1] - WARN  [QuorumPeer[myid=1]/0:0:0:0:0:0:0:0:2181:QuorumCnxManager@584] - Cannot open channel to 2 at election address /192.168.174.131:3888
java.net.NoRouteToHostException: 没有到主机的路由 (Host unreachable)	'//发现报这个错误'
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:558)
	at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:610)
	at org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:838)

解决办法：关闭防火墙与核心防护

systemctl stop firewalld && systemctl disable firewalld
setenforce 0 && sed -i 's/^SELINUX=.*/SELINUX=disabled/' /etc/selinux/config