kafka 中zookeeper报错 cant open channel to 2 at election address

Posted 2021-12-03 X糊涂仙儿

kafka启动Zookeeper报错如下:

[2021-12-01 20:12:35,971] WARN Cannot open channel to 2 at election address /0.0.0.0:3888 (org.apache.zookeeper.server.quorum.QuorumCnxManager) 
java.net.ConnectException: Connection refused (Connection refused) 
 at java.net.PlainSocketImpl.socketConnect(Native Method) 
 at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) 
 at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:204) 
 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.connectOne(QuorumCnxManager.java:558) 
 at org.apache.zookeeper.server.quorum.QuorumCnxManager.toSend(QuorumCnxManager.java:534) 
 at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.process(FastLeaderElection.java:454) 
 at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$

解决方法:

在每台机器自身ip监听:
server.1=10.20.20.10:2888:3888
server.2=10.20.20.11:2888:3888
server.3=0.0.0.0:2888:3888

修改后，仍会有类似报错:
[2021-12-01 20:35:04,726] WARN Cannot open channel to 1 at election address /10.20.20.10:3888 (org.apache.zookeeper.server.quorum.QuorumCnxManager)
java.net.ConnectException: Connection refused (Connection refused)

​​https://stackoverflow.com/questions/30940981/zookeeper-error-cannot-open-channel-to-x-at-election-address#​​

解决如下，要细心不可马虎。引自stackoverflow:

I met the save question and solved it.

make sure the myid is the save with your configuration in the zoo.cfg.

please check your zoo.cfg file in your conf directory, which contains such content.

server.1=zookeeper1:2888:3888  
server.2=zookeeper2:2888:3888  
server.3=zookeeper3:2888:3888  
and check the myid in your server dataDir directory. For example:

lets say the dataDir defined on the zoo.cfg is /home/admin/data

then on zookeeper1, you must have a file named myid and have value 1 on this file ;on zookeeper2, you must have a file named myid and have value 2 on this file; on zookeeper3, you must have a file named myid and have value 3 on this file.

if not configured like this, the server will listen on a wrong ip:port.

最终完美解决