zookeeper 集群配置采坑 Connection refused WARN [QuorumPeer[myid=1]/0:0:0:0:0:0:0:0:2181:QuorumCnxManager@584] - Cannot open channel to 3 at election address slave2/192.168.127.133:3888

时间:2021-07-29 12:37:26

坑一:

Cannot open channel to  at election address slave1/192.168.127.132:
java.net.ConnectException: Connection refused (Connection refused)

如上情况:132 ip 3888 端口没开。通常是zookeeper服务没起

端口检查:

netstat -anp | grep 3888

正常开启如下:

zookeeper 集群配置采坑  Connection refused    WARN  [QuorumPeer[myid=1]/0:0:0:0:0:0:0:0:2181:QuorumCnxManager@584] - Cannot open channel to 3 at election address slave2/192.168.127.133:3888

 zookeeper 集群不像hadoop集群,在master上启动后其他的slave也启动。必须手动或者其他脚本启动。启动后。/usr/local/zookeeper/bin目录下会生成zookeeper.out文件

坑二:

确保:集群中的selinux 关闭

检查:

getenforce:
disabled : 已经关闭 setenforce 临时关闭 vim /etc/selinux/config 改为disabled

三: 确保防火墙关闭或者端口在防火墙中配置好:

centos7 :

systemctl stop firewalld.service