一.报错现象
安装zookeeper集群，启动和查看状态报错
[root@elk01 ~]# zkServer.sh start/es/softwares/jdk1.8.0_351/bin/java
ZooKeeper JMX enabled by default
Using config: /es/softwares/zk/bin/../conf/zoo.cfg
Starting zookeeper ... FAILED TO START
等待一会儿
[root@elk01 zk]# zkServer.sh status/es/softwares/jdk1.8.0_351/bin/java
ZooKeeper JMX enabled by default
Using config: /es/softwares/zk/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost. Client SSL: false.
Error contacting service. It is probably not running.
连接测试报错
[root@elk01 zk]# zkCli.sh/es/softwares/jdk1.8.0_351/bin/java
Connecting to localhost:2181
......
Welcome to ZooKeeper!
2024-11-23 20:26:22,033 [myid:localhost:2181] - INFO [main-SendThread(localhost:2181):o.a.z.ClientCnxn$SendThread@1177] - Opening socket connection to server localhost/0:0:0:0:0:0:0:1:2181.
2024-11-23 20:26:22,033 [myid:localhost:2181] - INFO [main-SendThread(localhost:2181):o.a.z.ClientCnxn$SendThread@1179] - SASL config status: Will not attempt to authenticate using SASL (unknown error)
2024-11-23 20:26:22,042 [myid:localhost:2181] - WARN [main-SendThread(localhost:2181):o.a.z.ClientCnxn$SendThread@1300] - Session 0x0 for server localhost/0:0:0:0:0:0:0:1:2181, Closing socket connection. Attempting reconnect except it is a SessionExpiredException.
java.net.ConnectException: 拒绝连接
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:715)
at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:344)
at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1289)
JLine support is enabled
[zk: localhost:2181(CONNECTING) 0] 2024-11-23 20:26:23,148 [myid:localhost:2181] - INFO [main-SendThread(localhost:2181):o.a.z.ClientCnxn$SendThread@1177] - Opening socket connection to server localhost/0:0:0:0:0:0:0:1:2181.
2024-11-23 20:26:23,149 [myid:localhost:2181] - INFO [main-SendThread(localhost:2181):o.a.z.ClientCnxn$SendThread@1179] - SASL config status: Will not attempt to authenticate using SASL (unknown error)
2024-11-23 20:26:23,150 [myid:localhost:2181] - WARN [main-SendThread(localhost:2181):o.a.z.ClientCnxn$SendThread@1300] - Session 0x0 for server localhost/0:0:0:0:0:0:0:1:2181, Closing socket connection. Attempting reconnect except it is a SessionExpiredException.
二.排查问题
1.未发现其他多余的进程和zk进程
[root@elk01 conf]# jps
32220 Jps
23999 Elasticsearch
[root@elk01 conf]#netstat -nlpt | grep -E "2181|2888|3888"2.查看日志
cd /es/softwares/zk/logs
tailf -n 100 zookeeper-root-server-elk01.out报错
2024-11-23 20:53:36,643 [myid:176] - ERROR [main:o.a.z.s.q.QuorumPeerMain@114] - Unexpected exception, exiting abnormally
java.lang.RuntimeException: My id 176 not in the peer list
at org.apache.zookeeper.server.quorum.QuorumPeer.start(QuorumPeer.java:1130)
at org.apache.zookeeper.server.quorum.QuorumPeerMain.runFromConfig(QuorumPeerMain.java:229)
at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:137)
at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:91)
3.查看配置文件 发现server.id的ID与myid的值不一致
#查看zk的配置文件
cd /es/softwares/zk/conf/
cat zoo.cfg
tickTime=2000
initLimit=10
syncLimit=5
dataDir=/data/softwares/zk/data
dataLogDir=/data/softwares/zk/logs
clientPort=2181
server.1=192.168.77.176:2888:3888
server.2=192.168.77.177:2888:3888
server.3=192.168.77.178:2888:3888
EOF
#查看myid
cat /data/softwares/zk/data/myid
176三.解决问题
1.修改配置文件，使server.1的ID与myid的值一致
#创建zk的配置文件
cd /es/softwares/zk/conf/
cat >zoo.cfg<<'EOF'
tickTime=2000
initLimit=10
syncLimit=5
dataDir=/data/softwares/zk/data
dataLogDir=/data/softwares/zk/logs
clientPort=2181
server.176=192.168.77.176:2888:3888
server.177=192.168.77.177:2888:3888
server.178=192.168.77.178:2888:3888
EOF2.再次启动查看
#启动Zookeeper服务 所有节点上执行
zkServer.sh start
#查看zk的角色状态
zkServer.sh status注:启动后，稍等片刻，所有节点启动后，再查看状态。不然会报错Error contacting service. It is probably not running.
3.状态正常
[root@elk01 conf]# zkServer.sh status/es/softwares/jdk1.8.0_351/bin/java
ZooKeeper JMX enabled by default
Using config: /es/softwares/zk/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost. Client SSL: false.
Mode: follower
[root@elk02 conf]# zkServer.sh status/es/softwares/jdk1.8.0_351/bin/java
ZooKeeper JMX enabled by default
Using config: /es/softwares/zk/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost. Client SSL: false.
Mode: leader
