Zookeeper连接错误 [英] Zookeeper connection error

问题描述

我们在开发机器上有一个独立的Zookeeper设置.除此一台testdev机器外，它可用于其他所有开发机器.

We have a standalone zookeeper setup on a dev machine. It works fine for every other dev machine except this one testdev machine.

当尝试通过testdev连接到zookeeper时，我们一遍又一遍地出现此错误:

We get this error over and over again when trying to connect to zookeeper through testdev:

2012-11-09 14:06:53,909 - INFO  [main-SendThread(zk01.dev.bunchball.net:2181):ClientCnxn$SendThread@947] - Socket connection established to zk01.dev.bunchball.net/192.168.8.58:2181, initiating session
2012-11-09 14:06:53,911 - INFO  [main-SendThread(zk01.dev.bunchball.net:2181):ClientCnxn$SendThread@1183] - Unable to read additional data from server sessionid 0x0, likely server has closed socket, closing socket connection and attempting reconnect
2012-11-09 14:06:55,366 - INFO  [main-SendThread(zk01.dev.bunchball.net:2181):ClientCnxn$SendThread@1058] - Opening socket connection to server zk01.dev.bunchball.net/192.168.8.58:2181
2012-11-09 14:06:55,368 - INFO  [main-SendThread(zk01.dev.bunchball.net:2181):ClientCnxn$SendThread@947] - Socket connection established to zk01.dev.bunchball.net/192.168.8.58:2181, initiating session
2012-11-09 14:06:55,368 - INFO  [main-SendThread(zk01.dev.bunchball.net:2181):ClientCnxn$SendThread@1183] - Unable to read additional data from server sessionid 0x0, likely server has closed socket, closing socket connection and attempting reconnect
2012-11-09 14:06:57,271 - INFO  [main-SendThread(zk01.dev.bunchball.net:2181):ClientCnxn$SendThread@1058] - Opening socket connection to server zk01.dev.bunchball.net/192.168.8.58:2181
2012-11-09 14:06:57,274 - INFO  [main-SendThread(zk01.dev.bunchball.net:2181):ClientCnxn$SendThread@947] - Socket connection established to zk01.dev.bunchball.net/192.168.8.58:2181, initiating session
2012-11-09 14:06:57,275 - INFO  [main-SendThread(zk01.dev.bunchball.net:2181):ClientCnxn$SendThread@1183] - Unable to read additional data from server sessionid 0x0, likely server has closed socket, closing socket connection and attempting reconnect

我们尝试重新启动测试开发机，也重新启动了Zookeeper主机，但没有任何效果.我们完全感到困惑，为什么它可以与除此以外的其他机器完美配合.可能是什么原因造成的?

We tried restarting the test dev machine, and also restart zookeeper host but nothing worked. We are totally confused why it works perfectly fine with other machines except this one. What might be the cause of this?

推荐答案

我的情况与您相同，而且我已经解决了此问题.

I just have the same situation as you and I have just fixed this problem.

这是您配置偶数动物园管理员的原因，直接导致 此问题，请尝试将您的Zookeeper节点数更改为奇数.

It is the reason that you have configured even number of zookeepers which directly result in this problem,try to change your number of zookeeper node to a odd one.

例如，我的zookeeper群集的原始状态由4个节点组成，然后仅删除其中一个，导致节点数变为3 好了，现在可以启动Zookeeper集群了

for example the original status of my zookeeper cluster is consisted of 4 nodes,then just remove one of them which result in the number of node to be 3 well ,now its ok to startup zookeeper cluster

以下是成功连接到Zookeeper服务器的输出

below is the output of successfully connect to zookeeper server

2013-04-22 22:07:05,654 [myid:] - INFO  [main:ZooKeeper@438] - Initiating client connection, connectString=localhost:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@1321ed6
Welcome to ZooKeeper!
2013-04-22 22:07:05,704 [myid:] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@966] - Opening socket connection to server localhost/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
JLine support is enabled
2013-04-22 22:07:05,727 [myid:] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@849] - Socket connection established to localhost/127.0.0.1:2181, initiating session
[zk: localhost:2181(CONNECTING) 0] 2013-04-22 22:07:05,846 [myid:] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@1207] - Session establishment complete on server localhost/127.0.0.1:2181, sessionid = 0x13e3211c06e0000, negotiated timeout = 30000

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