Dubbo错误:No provider available for the service

Dubbo错误:No provider available for the service

错误信息：

Caused by:java.lang.IllegalStateException: Failed to check the status of the service com.itheima.UserService. No provider available for the service com.itheima.UserService from the url zookeeper://192.168.40.134:2181/com.alibaba.dubbo.registry.RegistryService?anyhost=true&application=dubbox-web&check=false&dubbo=2.8.4&generic=false&interface=com.itheima.UserService&methods=name&pid=5400&side=consumer×tamp=1509027241597 
 to the consumer 10.254.9.113 
 use dubbo version 2.8.4
   at com.alibaba.dubbo.config.ReferenceConfig.createProxy(ReferenceConfig.java:420)
    at com.alibaba.dubbo.config.ReferenceConfig.init(ReferenceConfig.java:300)
    at com.alibaba.dubbo.config.ReferenceConfig.get(ReferenceConfig.java:138)
    at com.alibaba.dubbo.config.spring.AnnotationBean.refer(AnnotationBean.java:317)

解决方法：

dubbo监控中心：/tomcat/webapps/dubbo-admin/WEB-INF/dubbo.properties
一、修改dubbo.properties配置文件：
    添加一行截图如下：
    二、修改Dubbo服务端spring配置文件中dubbo发布信息：
    <dubbo:protocol name="dubbo" port="20880" host="同上主机IP地址"/>
三、在Dubbo消费端spring配置文件dubbo消费信息中，添加如下一行：
    <dubbo:protocol host="同上主机IP地址"/>

最后重启Dubbo监控中心、停止消费者端，停止服务提供端，启动服务提供端，再启动消费者端。去监控中心刷新看看，是不是一切都正常了！[原文出处]：http://blog.csdn.net/chwshuang/article/details/51334180