linux 安装启动zookeeper全过程及遇到的坑

1、下载安装zookeeper

参考文章：https://blog.youkuaiyun.com/weixin_48887095/article/details/132397448

---

2、启动失败

1、启动失败JAVA_HOME is not set and java could not be found in PATH

• 已安装 JAVA 配置了JAVA_HOME,还是报错
• 解决方法：
• 参考：https://www.cnblogs.com/OnlyDreams/p/16694263.html
• 替换启动命令为 ./zkServer.sh start或bash zkServer.sh start

---

2、启动失败 ClassNotFoundException: org.apache.zookeeper.server.quorum.QuorumPeerMain

[root@xxx] zkServer.sh start-foreground

ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper/bin/../conf/zoo.cfg
Error: Could not find or load main class org.apache.zookeeper.server.quorum.QuorumPeerMain
Caused by: java.lang.ClassNotFoundException: org.apache.zookeeper.server.quorum.QuorumPeerMain

解决方法：https://blog.youkuaiyun.com/weixin_48887095/article/details/132397448

---

3、启动失败，端口8080被占用 Caused by: java.io.IOException: Failed to bind to /0.0.0.0:8080

解决方法：

• 参考：https://blog.youkuaiyun.com/lihaitao910215/article/details/105176064
• 修改配置，在zoo.cfg中添加了一行配置：admin.serverPort=8001

---

4、启动失败，端口2181被占用 java.net.BindException: Address already in use

• 查看端口占用：lsof -i:2181发现没有端口占用

• 修改配置：修改conf/zoo.cfg中的clientPort=2181 为clientPort=21810

• 参考：https://juejin.cn/post/7301342025881518089

3 启动成功

• 服务端启动成功：bash zkServer.sh status start
• 查看服务端状态:bash zkServer.sh status
• 停止服务端：bash zkServer.sh stop
• 启动客户端:bash zkCli.sh