status 500 reading AftersaleService＃getAftersaleList(Long)+com.sun.proxy.$Proxy214.getAftersaleList

feign.FeignException$InternalServerError: status 500 reading AftersaleService#getAftersaleList(Long)
    at feign.FeignException.serverErrorStatus(FeignException.java:195)
    at feign.FeignException.errorStatus(FeignException.java:144)
    at feign.FeignException.errorStatus(FeignException.java:133)
    at feign.codec.ErrorDecoder$Default.decode(ErrorDecoder.java:92)
    at feign.SynchronousMethodHandler.executeAndDecode(SynchronousMethodHandler.java:151)
    at feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:80)
    at feign.ReflectiveFeign$FeignInvocationHandler.invoke(ReflectiveFeign.java:103)
    at com.sun.proxy.$Proxy214.getAftersaleList(Unknown Source)
    at top.laxuan.manage.yzl.controller.AftersaleManageCtl.getAftersaleList(AftersaleManageCtl.java:37)
    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.doInvoke(InvocableHandlerMethod.java:190)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:888)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:793)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:660)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.springframework.session.web.http.SessionRepositoryFilter.doFilterInternal(SessionRepositoryFilter.java:141)
    at org.springframework.session.web.http.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:82)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:526)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:367)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:860)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1591)
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:748)

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出现问题的方法是个查询方法。

出现了500的问题。一般500都是传参的问题。检查了所有的参数，参数都能对的上。

后来在页面测试的时候发现 ：查询自己插入进去的值（所有值）就能被查到。查询已有的值就会报以上的错误。

百思不得其解。

无意间发现了一个报了一个错误，大概是形容我的实体bean里的某个值是空的异常。

兴奋ing。可能就是这个了。

于是查看了实体bean里有个get方法：

	@Transient
	public String getAfterTypeName() {
		if (this.afterType == 1) {
			afterTypeName = "AAAA1";
		} else if (this.afterType == 2){
			afterTypeName = "AAAA2";
		} else if (this.afterType == 3) {
			afterTypeName = "AAAA3";
		} else if (this.afterType == 4) {
			afterTypeName = "AAAA4";
		} else if (this.afterType == 5){
			afterTypeName = "AAAA5";
		} else if (this.afterType == 6){
			afterTypeName = "AAAA6";
		} else{
			afterTypeName = "";
		}
		
		return afterTypeName;
	}

查询出来的afterType的值如果是空的会让程序报错。

于是我这样改了他

	@Transient
	public String getAfterTypeName() {
		if (this.afterType != null) {
			if (this.afterType == 1) {
				afterTypeName = "BBBB1";
			} else if (this.afterType == 2){
				afterTypeName = "BBBB2";
			} else if (this.afterType == 3) {
				afterTypeName = "BBBB3";
			} else if (this.afterType == 4) {
				afterTypeName = "BBBB4";
			} else if (this.afterType == 5){
				afterTypeName = "BBBB5";
			} else if (this.afterType == 6){
				afterTypeName = "BBBB6";
			} else{
				afterTypeName = "";
			}
		}
		
		return afterTypeName;
	}

于是。。。我的一个简单又莫名其妙的问题就解决了！！

---------------------

总结：500不一定是500的错误、也可以百度一下【at com.sun.proxy.$Proxy214.getAftersaleList(Unknown Source)】的错误信息，我找到了很多可能性 但是被我一一排除了，但是真的可能会有用的！

每到这个时候一定要静下心。