遇到这个异常懵逼了很长时间才解决，axis2框架个人感觉进行接口相互调用还是比较麻烦的，

调了很长时间，我由a项目调用b项目的接口时，一直报这个错，在网上找了很长时间，也没找到

解决的办法，自己慢慢的调的过程中得以解决，现在总结一下。

1.异常展示：

org.apache.axis2.AxisFault: unknown

    at org.apache.axis2.util.Utils.getInboundFaultFromMessageContext(Utils.java:531)

    at org.apache.axis2.description.OutInAxisOperationClient.handleResponse(OutInAxisOperation.java:375)

    at org.apache.axis2.description.OutInAxisOperationClient.send(OutInAxisOperation.java:421)

    at org.apache.axis2.description.OutInAxisOperationClient.executeImpl(OutInAxisOperation.java:229)

    at org.apache.axis2.client.OperationClient.execute(OperationClient.java:165)

    at com.allcam.system.wsclient.vod.VodServiceStub.postVodInfo(VodServiceStub.java:1049)

    at com.allcam.system.manager.videoOnDemand.impl.service.ManageDemandVideoServiceImpl.invokingWs(ManageDemandVideoServiceImpl.java:370)

    at com.allcam.system.manager.videoOnDemand.impl.service.ManageDemandVideoServiceImpl.addDemandVideoCallWs(ManageDemandVideoServiceImpl.java:290)

    at com.allcam.system.manager.resManage.controller.ResHandPlayController.demandVideoSubmit(ResHandPlayController.java:985)

    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

    at java.lang.reflect.Method.invoke(Method.java:498)

    at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:214)

    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)

    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)

    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:749)

    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:690)

    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)

    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945)

    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876)

    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)

    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:863)

    at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)

    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)

    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)

    at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)

    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)

    at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:61)

    at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108)

    at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137)

    at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)

    at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66)

    at org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449)

    at org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365)

    at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90)

    at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83)

    at org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:383)

    at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362)

    at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)

    at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:344)

    at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:261)

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)

    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)

    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)

    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)

    at com.allcam.system.filter.SystemFilter.doFilter(SystemFilter.java:87)

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)

    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)

    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)

    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)

    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)

    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)

    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)

    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)

    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522)

    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095)

    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)

    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)

    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

    at java.lang.Thread.run(Thread.java:745)

2.异常分析：报未知异常，我在确认生成的客户端和服务端的配置文件没有问题的时候，就仔细检查代码，

发现我的A项目挑用B项目接口时，打断点是可以进入B项目接口，由于打的断点次数比较多，在断点调试的过程

中，容易出现卡壳，我把项目清理了一遍，重新调试，断点进入到B项目接口中时，一步一步的调，然后遇到以下异常

java.lang.NullPointerException

    at com.allcam.bpc.webservice.vodservice.VodServiceSkeleton.initVodinfo(VodServiceSkeleton.java:595)

    at com.allcam.bpc.webservice.vodservice.VodServiceSkeleton.postVodInfo(VodServiceSkeleton.java:266)

    at com.allcam.bpc.webservice.vodservice.VodServiceMessageReceiverInOut.invokeBusinessLogic(VodServiceMessageReceiverInOut.java:114)

    at org.apache.axis2.receivers.AbstractInOutMessageReceiver.invokeBusinessLogic(AbstractInOutMessageReceiver.java:40)

    at org.apache.axis2.receivers.AbstractMessageReceiver.receive(AbstractMessageReceiver.java:114)

    at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:181)

    at org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:172)

    at org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:146)

    at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)

    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)

    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)

    at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:207)

    at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:176)

    at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)

    at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262)

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)

    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)

    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)

    at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:87)

    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)

    at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)

    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)

    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:121)

    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)

    at org.springframework.boot.context.web.ErrorPageFilter.doFilter(ErrorPageFilter.java:120)

    at org.springframework.boot.context.web.ErrorPageFilter.access$000(ErrorPageFilter.java:61)

    at org.springframework.boot.context.web.ErrorPageFilter$1.doFilterInternal(ErrorPageFilter.java:95)

    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

    at org.springframework.boot.context.web.ErrorPageFilter.doFilter(ErrorPageFilter.java:113)

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)

    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)

    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)

    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)

    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)

    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)

    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)

    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)

    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522)

    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095)

    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)

    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)

    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

    at java.lang.Thread.run(Thread.java:745)

紧接着A项目中报了一个unknown的异常，当我把B项目接口中的异常解决之后，unknown异常也就解决了。

3.经验总结：在刚开始出现问题的时候，一直是先让项目运行，检查是否报异常，

由于在tomcat中配置了两个项目同时运行，因为控制台会默认显示客户端的日志文件，

服务端的日志文件则需要切换后才可查看，如上图所示，检查异常需要非常仔细，才可以快速

定位到异常所在。

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