【分布式】zookeeper遇到问题与解决

server/2024/10/11 4:27:32/

zookeeper_0">1. zookeeper的启动与状态检查命令

./zkServer.sh start # 启动zookeeper
./zkServer.sh status # 检查启动状态

2. 问题与解决

这里我启动以后输出：

ZooKeeper JMX enabled by default
Using config: /opt/zookeeper/apache-zookeeper-3.5.6-bin/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED

查看状态输出：

ZooKeeper JMX enabled by default
Using config: /opt/zookeeper/apache-zookeeper-3.5.6-bin/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Error contacting service. It is probably not running.

2.1 解决一：端口占用问题

网上查到的问题之一是端口占用
cenos下安装网络工具：

yum install net-tools

查看端口占用情况：

netstat -tuln | grep 2181

输出结果为：

tcp6       0      0 :::2181                 :::*                    LISTEN      18194/java

杀死线程：

kill -9 18194

再次执行启动和检查状态命令，仍然提示原来的问题，于是尝试修改端口：

vim ../conf/zoo.cfg

并将端口从clientPort=2181→clientPort=2182
再次执行启动和检查状态命令，仍然提示原来的问题

2.2 解决二：防火墙问题

尝试关闭防火墙，但是提示防火墙未安装，于是进行安装：

yum install firewalld
yum install iptables-services
systemctl stop firewalld.service # 网上搜到的防火墙关闭命令，或者是systemctl stop firewalld
service iptables stop # 暂时性关闭防火墙
chkconfig iptables off # 永久性关闭防火墙

2.3 解决三：做完上述操作后，关闭服务，重新启动

非常重要的zookeeper服务关闭命令：

./zkServer.sh stop

结果为：

ZooKeeper JMX enabled by default
Using config: /opt/zookeeper/apache-zookeeper-3.5.6-bin/bin/../conf/zoo.cfg
Stopping zookeeper ... STOPPED

确认一下端口是不是没被占用：

netstat -apn | grep 2182

无输出，没被占用
再次输入两行语句

ZooKeeper JMX enabled by default
Using config: /opt/zookeeper/apache-zookeeper-3.5.6-bin/bin/../conf/zoo.cfg
Starting zookeeper ... STARTEDZooKeeper JMX enabled by default
Using config: /opt/zookeeper/apache-zookeeper-3.5.6-bin/bin/../conf/zoo.cfg
Client port found: 2182. Client address: localhost.
Mode: standalone

启动成功