Java——接口测试问题（com.alibaba.dubbo.common.bytecode.NoSuchMethodException）

正文

  小菜继续成长积累中，今天小菜说说我这两天费了九牛二虎之力写好的接口，在test类中进行测试有数据，前端调用此接口时怎么着都没有数据！
  Why？？？
  Because——代码没有提交，提交后Jenkins上没有构建
  愁苦了一天，查了一天，才发现都是好低级的错误呀，就是因为我满心欢喜的以为自己在test类中测试自己写的接口有数据了，我就没事了，然而却不知道自己的职责是要让前端能够获取到数据，漏掉了到真正起作用的测试——swagger。下面小菜记录一下因为自己的无知而遇到的问题。

错误详情

2018-05-09 20:30:29,884 ERROR com.dmsdbj.itoo.teachingManagement.controller.TeacherCourseController.queryTeachercourseInfo(TeacherCourseController.java:623) http-bio-8080-exec-7 |- TeacherCourseController.queryTeachercourseInfo()方法出错
com.alibaba.dubbo.rpc.RpcException: Failed to invoke the method queryTeachercourseInfo in the service com.dmsdbj.itoo.teachingManagement.facade.TeacherCourseFacade. Tried 3 times of the providers [192.168.22.53:20889] (1/1) from the registry 192.168.22.60:2181 on the consumer 192.168.228.11 using the dubbo version 2.5.8. Last error is: Failed to invoke remote method: queryTeachercourseInfo, provider: dubbo://192.168.22.53:20889/com.dmsdbj.itoo.teachingManagement.facade.TeacherCourseFacade?anyhost=true&application=teachingManagementweb&check=false&default.check=false&default.group=local&default.timeout=30000&dubbo=2.5.8&generic=false&interface=com.dmsdbj.itoo.teachingManagement.facade.TeacherCourseFacade&methods=queryCourse,queryTeacher,addTeacherCourseMultiple,queryTeacherInfo,queryTeacherCourseClass,updateTeacherCourse,queryTeacherCourse,fuzzyQueryAllCourse,querySemesters,deleteTeacherCourses,addTeacherCourse,queryTeacherCourseList,fuzzyQueryTeacherCourseExport,queryUrlByName,fuzzyQueryTeacher,queryTeacherIdAndName,fuzzyQueryTeacherCourse,findIsInsertTheSame,exportTeacherCourse&pid=784&register.ip=192.168.228.11&remote.timestamp=1525860445921&revision=1.0.5-SNAPSHOT&side=consumer&timestamp=1525868651484, cause: com.alibaba.dubbo.rpc.RpcException: Failed to invoke remote proxy method queryTeachercourseInfo to registry://192.168.22.60:2181/com.alibaba.dubbo.registry.RegistryService?application=teachingManagementservice&dubbo=2.5.8&export=dubbo%3A%2F%2F192.168.22.53%3A20889%2Fcom.dmsdbj.itoo.teachingManagement.facade.TeacherCourseFacade%3Fanyhost%3Dtrue%26application%3DteachingManagementservice%26bind.ip%3D192.168.22.53%26bind.port%3D20889%26default.group%3Dlocal%26default.timeout%3D30000%26dubbo%3D2.5.8%26generic%3Dfalse%26interface%3Dcom.dmsdbj.itoo.teachingManagement.facade.TeacherCourseFacade%26methods%3DqueryCourse%2CqueryTeacher%2CaddTeacherCourseMultiple%2CqueryTeacherInfo%2CqueryTeacherCourseClass%2CupdateTeacherCourse%2CqueryTeacherCourse%2CfuzzyQueryAllCourse%2CquerySemesters%2CdeleteTeacherCourses%2CaddTeacherCourse%2CqueryTeacherCourseList%2CfuzzyQueryTeacherCourseExport%2CqueryUrlByName%2CfuzzyQueryTeacher%2CqueryTeacherIdAndName%2CfuzzyQueryTeacherCourse%2CfindIsInsertTheSame%2CexportTeacherCourse%26pid%3D14206%26revision%3D1.0.5-SNAPSHOT%26side%3Dprovider%26timestamp%3D1525860445921&pid=14206&register=true&registry=zookeeper&timestamp=1525860445921, cause: Not found method “queryTeachercourseInfo” in class com.dmsdbj.itoo.teachingManagement.facade.impl.TeacherCourseFacadeImpl.
com.alibaba.dubbo.rpc.RpcException: Failed to invoke remote proxy method queryTeachercourseInfo to registry://192.168.22.60:2181/com.alibaba.dubbo.registry.RegistryService?application=teachingManagementservice&dubbo=2.5.8&export=dubbo%3A%2F%2F192.168.22.53%3A20889%2Fcom.dmsdbj.itoo.teachingManagement.facade.TeacherCourseFacade%3Fanyhost%3Dtrue%26application%3DteachingManagementservice%26bind.ip%3D192.168.22.53%26bind.port%3D20889%26default.group%3Dlocal%26default.timeout%3D30000%26dubbo%3D2.5.8%26generic%3Dfalse%26interface%3Dcom.dmsdbj.itoo.teachingManagement.facade.TeacherCourseFacade%26methods%3DqueryCourse%2CqueryTeacher%2CaddTeacherCourseMultiple%2CqueryTeacherInfo%2CqueryTeacherCourseClass%2CupdateTeacherCourse%2CqueryTeacherCourse%2CfuzzyQueryAllCourse%2CquerySemesters%2CdeleteTeacherCourses%2CaddTeacherCourse%2CqueryTeacherCourseList%2CfuzzyQueryTeacherCourseExport%2CqueryUrlByName%2CfuzzyQueryTeacher%2CqueryTeacherIdAndName%2CfuzzyQueryTeacherCourse%2CfindIsInsertTheSame%2CexportTeacherCourse%26pid%3D14206%26revision%3D1.0.5-SNAPSHOT%26side%3Dprovider%26timestamp%3D1525860445921&pid=14206&register=true&registry=zookeeper&timestamp=1525860445921, cause: Not found method “queryTeachercourseInfo” in class com.dmsdbj.itoo.teachingManagement.facade.impl.TeacherCourseFacadeImpl.
at com.alibaba.dubbo.rpc.proxy.AbstractProxyInvoker.invoke(AbstractProxyInvoker.java:76)
at com.alibaba.dubbo.config.invoker.DelegateProviderMetaDataInvoker.invoke(DelegateProviderMetaDataInvoker.java:36)
at com.alibaba.dubbo.rpc.protocol.InvokerWrapper.invoke(InvokerWrapper.java:53)
at com.alibaba.dubbo.rpc.filter.ExceptionFilter.invoke(ExceptionFilter.java:64)
at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:69) at com.alibaba.dubbo.monitor.support.MonitorFilter.invoke(MonitorFilter.java:75) at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:69)
at com.alibaba.dubbo.rpc.filter.TimeoutFilter.invoke(TimeoutFilter.java:42)
at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:69) at com.alibaba.dubbo.rpc.protocol.dubbo.filter.TraceFilter.invoke(TraceFilter.java:78) at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:69)
at com.alibaba.dubbo.rpc.filter.ContextFilter.invoke(ContextFilter.java:61)
at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:69) at com.alibaba.dubbo.rpc.filter.GenericFilter.invoke(GenericFilter.java:132) at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:69)
at com.alibaba.dubbo.rpc.filter.ClassLoaderFilter.invoke(ClassLoaderFilter.java:38)
at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:69) at com.alibaba.dubbo.rpc.filter.EchoFilter.invoke(EchoFilter.java:38) at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:69)
at com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol$1.reply(DubboProtocol.java:98) at com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.handleRequest(HeaderExchangeHandler.java:98) at com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.received(HeaderExchangeHandler.java:170) at com.alibaba.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:52) at com.alibaba.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:81) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: com.alibaba.dubbo.common.bytecode.NoSuchMethodException: Not found method “queryTeachercourseInfo” in class com.dmsdbj.itoo.teachingManagement.facade.impl.TeacherCourseFacadeImpl.
at com.alibaba.dubbo.common.bytecode.Wrapper9.invokeMethod(Wrapper9.java)
at com.alibaba.dubbo.rpc.proxy.javassist.JavassistProxyFactory$1.doInvoke(JavassistProxyFactory.java:46)
at com.alibaba.dubbo.rpc.proxy.AbstractProxyInvoker.invoke(AbstractProxyInvoker.java:72)
… 26 more

解决过程

1.开始
  问：看到上面的一堆错误信息头疼吗？
  答：小菜自答一下刚开始真的头疼，一堆的英文，实在不想看。那咋办呢？不解决了吗？不能呗！咋办？


2.方向
  小菜找了句关键句“com. alibaba. dubbo. common. bytecode. NoSuchMethodException”放百度上，发现：网上给的答案是：Dubbo的注册中心zookeeper没有启动。于是乎我有了解决问题的方向。


3.仔细看错误信息

◆queryTeachercourseInfo()方法出错
  queryTeachercourseInfo()是我刚才写的接口为啥test类中都测试成功了，swagger上测试方法就出错呢？


◆Failed to invoke the method queryTeachercourseInfo in the service

   无法在服务中调用queryTeachercourseInfo方法。

4.找准原因
  这个时候我才明白，我的test类测试成功那是本地的，前端调接口是找到相应的服务然后找到对应的接口才能调用，我写的接口都没有在服务上构建如何调呢？当然失败啦

小结

  小菜明白出现这些问题足以显示小菜真的很菜，不过通过今天的这些一连串问题我还是学到了很多，首先遇到一长串的error信息要耐心细心看，实在看不懂找关键句查一下，然后找到自己解决问题的方向！小菜fighting！