java.lang.reflect.UndeclaredThrowableException问题描述场景是app端调用

问题描述场景是app端调用后台接口时，后台报错。异常日志信息：

java.lang.reflect.UndeclaredThrowableException: null at com.sun.proxy. $Proxy198.intersectionWithLogisticsTypeBySkuCodes(Unknown Source) at com.meifute.core.controller.MallNewOrderInfoController.queryProdAndGiftItems(MallNewOrderInfoController.java:136) at com.meifute.core.controller.MallNewOrderInfoController$$FastClassBySpringCGLIB$$657b0b9.invoke(<generated>) at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) at org.springframework.aop.framework.CglibAopProxy$ CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:738) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:85) at com.meifute.core.mmall.common.annotation.RequestLogAdvice.handle(RequestLogAdvice.java:41) 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.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:629) at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:618) at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.aop.framework.CglibAopProxyConnectionHandler.process(AbstractProtocol.java:868) at org.apache.tomcat.util.net.NioEndpoint $SocketProcessor.doRun(NioEndpoint.java:1459) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$ Worker.run(ThreadPoolExecutor.java:624) at org.apache.tomcat.util.threads.TaskThread $WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748) Caused by: java.lang.Exception: {"timestamp":1651818949592,"status":404,"error":"Not Found","message":"No message available","path":"/api/implement/item/intersection/with/logistic/type/by/skus"} at com.meifute.core.config.ExceptionErrorDecoder.decode(ExceptionErrorDecoder.java:34) at feign.SynchronousMethodHandler.executeAndDecode(SynchronousMethodHandler.java:138) at feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:76) at feign.ReflectiveFeign$ FeignInvocationHandler.invoke(ReflectiveFeign.java:103) ... 96 common frames omitted 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 问题分析 1、排查 java.lang.reflect.UndeclaredThrowableException: null 字面意思是未声明的一个异常，继续排查详细错误信息。 2、排查其他根据错误信息 java.lang.Exception: {“timestamp”:1651818949592,“status”:404,“error”:“Not Found”,“message”:“No message available”,“path”:“/api/implement/item/intersection/with/logistic/type/by/skus”} 很明显的一个错误码，404，请求的地址不通 3、定位到代码发现feign调用处出错，检查被调用服务的启动情况检查发现调用的服务未启动成功

问题解决重新启动被调用服务，接口正常