zookeeper报Unable to read additional data from server sessionid 0x0, likely server has closed socket, closing socket connection and attempting reconnect的解决
现象
服务器连不上，kafka报connection refused
测试发现kafka某台node(xx)的问题，登录上去也各种错误，zkServer.sh restart可以完成，但status报连不上。报错比较迷惑人，打开java log看到其他错误：
[myid:3] - INFO [ListenerThread:QuorumCnxManager$Listener@534] - My election bind port: /yy:3888 java.net.BindException: Cannot assign requested address ... [myid:3] - WARN [WorkerSender[myid=3]:QuorumCnxManager@400] - Cannot open channel to 1 at election address /xx:3888 java.net.ConnectException: Connection refused
其实这个错误可以看出来，出现了xx和yy2个地址，说明它认错了自己
解决方案
从zoo.cfg看下datadir，将下面的myid改成和zoo.cfg里的自己一样的。比如xx是
server.1=xx:2888:3888 server.2=yy:2888:3888 server.3=zz:2888:3888
那么它的myid必须是1
文章来自：http://www.cnblogs.com/elsonwe/p/6879015.html