错误信息：

2020-09-14 03:28:23,562 [myid:0] - WARN  [WorkerSender[myid=0]:QuorumCnxManager@588] - Cannot open channel to 3 at election address h6/192.168.1.16:3888
java.net.ConnectException: 拒绝连接 (Connection refused)
	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:562)
	at org.apache.zookeeper.server.quorum.QuorumCnxManager.toSend(QuorumCnxManager.java:538)
	at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.process(FastLeaderElection.java:452)
	at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.run(FastLeaderElection.java:433)
	at java.lang.Thread.run(Thread.java:748)
2020-09-14 03:28:23,563 [myid:0] - INFO  [WorkerSender[myid=0]:QuorumPeer$QuorumServer@167] - Resolved hostname: h6 to address: h6/192.168.1.16

错误原因：

1. 防火墙没有关闭：解决办法如下：（centos中）

sudo systemctl stop firewalld #临时关闭
sudo systemctl disable firewalld #然后reboot 永久关闭
sudo systemctl status  firewalld #查看防火墙状态。

2. ip地址不是本机网卡所转发。

解决办法：

                 让服务器监听0.0.0.0的ip(所有网卡)，在conf中的zoo.cfg配置文件中添加：quorumListenOnAllIPs=true