学者使用zookeeper 、dubbo 但是在配置文件以及客户端连接的时候出现了如下问题，下面来看看解决方法
1、spring配置文件dubbo标签报错
解决方法：选择windows-->preferrence-->xml->xmlcatalog-->add->catalog entry -->file system,选择模版文件后，修改key值为“http://code.alibabatech.com/schema/dubbo/dubbo.xsd”，然后在eclipse中文件报错处点击右键“validate”。
模板下载地址：http://download.csdn.net/detail/qh_java/9652469
模板下载地址：模板下载地址
2、配置好后服务端能起来，但是客户获取服务端服务时一直报异常
异常信息如下：
[java]view plaincopyprint?
2012-12-3110:51:41,562-[TS] INFO main-EventThread org.I0Itec.zkclient.ZkClient - zookeeper state changed (Disconnected)
2012-12-3110:51:43,008-[TS] INFO main-SendThread(17.22.17.1:2181) org.apache.zookeeper.ClientCnxn - Opening socket connection to server /17.22.17.1:2181. Will not attempt to authenticate using SASL (unknown error)
2012-12-3110:51:43,009-[TS] INFO main-SendThread(17.22.17.1:2181) org.apache.zookeeper.ClientCnxn - Socket connection established to /17.22.17.1:2181, initiating session
2012-12-3110:51:43,011-[TS] WARN main-SendThread(17.22.17.1:2181) org.apache.zookeeper.ClientCnxnSocket - Connected to an old server; r-o mode will be unavailable
2012-12-3110:51:43,011-[TS] INFO main-SendThread(17.22.17.1:2181) org.apache.zookeeper.ClientCnxn - Session establishment complete on server /17.22.17.1:2181, sessionid =0x13b8a23254100be, negotiated timeout =6000
2012-12-3110:51:43,012-[TS] INFO main-EventThread org.I0Itec.zkclient.ZkClient - zookeeper state changed (SyncConnected)
2012-12-3110:51:47,012-[TS] INFO main-SendThread(17.22.17.1:2181) org.apache.zookeeper.ClientCnxn - Client session timed out, have not heard from server in 4002msforsessionid0x13b8a23254100be, closing socket connection and attempting reconnect
2012-12-31 10:51:41,562-[TS] INFO main-EventThread org.I0Itec.zkclient.ZkClient - zookeeper state changed (Disconnected)
2012-12-31 10:51:43,008-[TS] INFO main-SendThread(17.22.17.1:2181) org.apache.zookeeper.ClientCnxn - Opening socket connection to server /17.22.17.1:2181. Will not attempt to authenticate using SASL (unknown error)
2012-12-31 10:51:43,009-[TS] INFO main-SendThread(17.22.17.1:2181) org.apache.zookeeper.ClientCnxn - Socket connection established to /17.22.17.1:2181, initiating session
2012-12-31 10:51:43,011-[TS] WARN main-SendThread(17.22.17.1:2181) org.apache.zookeeper.ClientCnxnSocket - Connected to an old server; r-o mode will be unavailable
2012-12-31 10:51:43,011-[TS] INFO main-SendThread(17.22.17.1:2181) org.apache.zookeeper.ClientCnxn - Session establishment complete on server /17.22.17.1:2181, sessionid = 0x13b8a23254100be, negotiated timeout = 6000
2012-12-31 10:51:43,012-[TS] INFO main-EventThread org.I0Itec.zkclient.ZkClient - zookeeper state changed (SyncConnected)
2012-12-31 10:51:47,012-[TS] INFO main-SendThread(17.22.17.1:2181) org.apache.zookeeper.ClientCnxn - Client session timed out, have not heard from server in 4002ms for sessionid 0x13b8a23254100be, closing socket connection and attempting reconnect
解决办法： 这个异常出现的原因是zookeeper使用的版本不一致导致的，所以建议安装的zookeeper、客户端的zookeeper架包以及服务端的zookeeper架包使用相同版本的就ok！
两个错误参考文章：
第一个错误：http://blog.csdn.net/small_cai/article/details/50511785
第二个错误：http://blog.csdn.net/azhao_dn/article/details/8469680
愿意了解或者源码的朋友直接求求交流分享技术：2042849237
更多详细源码参考来源：http://minglisoft.cn/technology