zookeeper搭建分布式集群启动失败(Error contacting service. It is probably not running.)

1.排查

1.启动zookeeper后查看状态/bin/zkServer.sh status发现报错Error contacting service. It is probably not running.

[root@zookeeper01 apache-zookeeper-3.8.2-bin]# ./bin/zkServer.sh status
/usr/bin/java
ZooKeeper JMX enabled by default
Using config: /opt/apache-zookeeper-3.8.2-bin/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost. Client SSL: false.
Error contacting service. It is probably not running.

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2.查看日志zookeeper-root-server-zookeeper01.out
发现报了一拒绝链接java.net.ConnectException: 拒绝连接 (Connection refused)

[root@zookeeper01 logs]# pwd
/opt/apache-zookeeper-3.8.2-bin/logs
[root@zookeeper01 logs]# ls
zookeeper-root-server-zookeeper01.out
[root@zookeeper01 logs]# vim zookeeper-root-server-zookeeper01.out

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2023-09-05 01:09:12,322 [myid:] - INFO  [QuorumPeer[myid=1](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):o.a.z.s.q.FastLeaderElection@996] - Notification time out: 400 ms
2023-09-05 01:09:12,323 [myid:] - WARN  [QuorumConnectionThread-[myid=1]-2:o.a.z.s.q.QuorumCnxManager@401] - Cannot open channel to 3 at election address zookeeper03/192.168.75.132:3888
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:607)
        at org.apache.zookeeper.server.quorum.QuorumCnxManager.initiateConnection(QuorumCnxManager.java:384)
        at org.apache.zookeeper.server.quorum.QuorumCnxManager$QuorumConnectionReqThread.run(QuorumCnxManager.java:458)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:750)

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2.解决

方法1：

将配置文件zoo.cfg中节点对应机器的地址改为：0.0.0.0
修改完再此启动即可解决。

注意：每台机器都要改。不能只改一个节点

server.1=0.0.0.0:2888:3888
server.2=zookeeper02:2888:3888
server.3=zookeeper03:2888:3888
quorumListenOnAllIPs=true

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方法2：

若上面方法没有成功，继续下面方法2

• 删除data目录下的文件version-2,zookeeper_server.pid
rm -rf [文件名]

[root@jhh100 data]# pwd
/opt/zookeeper/data
[root@jhh100 data]# ls
myid  version-2  zookeeper_server.pid

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• 查看2181线程是否在运行，在的话，杀掉。
  netstat -nltp | grep 2181
kill -9 [线程号]

[root@jhh100 zookeeper]# netstat -nltp | grep 2181
tcp6       0      0 :::2181                 :::*                    LISTEN      74180/java          
[root@jhh100 zookeeper]# kill -9 74180

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• 启动服务