dubbo zookeeper Failed to check the status of the service...No provider available for the service

异常

在dubbo与zookeeper的简单案例中，成功启动provider应用，由于粘贴粗心，在启动consumer应用的时候蹦出一个ERROR

java.lang.reflect.InvocationTargetException: null
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_241]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_241]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_241]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_241]
	at com.alibaba.dubbo.config.AbstractConfig.toString(AbstractConfig.java:474) ~[dubbo-2.6.2.jar:2.6.2]
...
Failed to check the status of the service...
...
No provider available for the service...
...

不愿意看记录，可以直接翻到文末找解决办法

调用异常？

于是四处查找，找注解，没问题；找yml配置没问题；找服务器上zookeeper的配置，找aliyun安全组配置，都没问题。找了老长时间，天已经很晚了

第二天才认真去看ERROR后的正常log，log真的很长，一大溜，头天晚上并没有认真往后翻。于是看到以下日志

在consumer应用的相关log是：
c.a.d.r.zookeeper.ZookeeperRegistry : [DUBBO] Register: consumer://192.168.43.100/com.icourage.consumeruser.service.TicketService
和
c.a.d.r.zookeeper.ZookeeperRegistry : [DUBBO] Subscribe: consumer://192.168.43.100/com.icourage.consumeruser.service.TicketService
也就是register和subscribe的是com.icourage.consumeruser.service.TicketService

在provider应用的相关log是：
c.a.d.r.zookeeper.ZookeeperRegistry : [DUBBO] Register: dubbo://192.168.43.100:12398/com.icourage.providerticket.service.TicketService
和
c.a.d.r.zookeeper.ZookeeperRegistry : [DUBBO] Subscribe: provider://192.168.43.100:12398/com.icourage.providerticket.service.TicketService
register和subscribe的是com.icourage.providerticket.service.TicketService
notify的URL：
c.a.d.r.zookeeper.ZookeeperRegistry : [DUBBO] Notify urls for subscribe url provider://192.168.43.100:12398/com.icourage.providerticket.service.TicketService

原因

• provider注册和notify的是com.icourage.providerticket.service.TicketService
• consumer订阅的是com.icourage.consumeruser.service.TicketService
• 所以consumer根本找不到这个接口，抛出调用异常

具体原因

provider应用启动类上的 @EnableDubbo 注解会扫描与启动类同级的包及其子包（与Spring..扫描范围相同）是否有 @com.alibaba.dubbo.config.annotation.Service 标识的类，注册的接口是该类的全路径【package name.class name】
consumer应用则会以 @Reference 的接口 refer
resources

解决办法

从上面可以看到是consumer应用中，interface TicketService 所在包有问题，应该是 com.icourage.providerticket.service，所以

• 调整consumer应用的目录结构
• 
• 重新 compile

简单案例源码

PS：保持好的分包、编码习惯他不香吗

dubbo zookeeper Failed to check the status of the service...No provider available for the service

原文：https://www.cnblogs.com/Ycourage/p/12676020.html