一、异常出现的场景

 Spring Cloud 服务A通过feign调用服务B;之前是好好的，但今天突然就不好了，抛以下异常
===》 出现原因补充，Spring Boot默认的JSON方式 Jackson,对应的消息转化器是org.springframework.http.converter.json.MappingJackson2HttpMessageConverter，但是项目手动指定了fastjson的MessageConverter，没有指定SupportedMediaTypes

加入指定的类型就可以了，如下
fastConverter.setSupportedMediaTypes(Arrays.asList(MediaType.APPLICATION_JSON,MediaType.APPLICATION_JSON_UTF8));
 Exception:public class feign.codec.EncodeException

feign.codec.EncodeException: 'Content-Type' cannot contain wildcard type '*'

    at feign.ReflectiveFeign$BuildEncodedTemplateFromArgs.resolve(ReflectiveFeign.java:349)

    at feign.ReflectiveFeign$BuildTemplateByResolvingArgs.create(ReflectiveFeign.java:213)

    at feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:72)

    at feign.ReflectiveFeign$FeignInvocationHandler.invoke(ReflectiveFeign.java:103)

    at com.sun.proxy.$Proxy287.saleGoods(Unknown Source)

    at com.xinchan.xcauto.merchants.common.service.local.GoodsCommonManager.goodsStockHandle(GoodsCommonManager.java:99)

    at com.xinchan.xcauto.merchants.saas.service.impl.WorkSheetSaasServiceImpl.directDeductCardForWorksheet(WorkSheetSaasServiceImpl.java:1422)

    at com.xinchan.xcauto.merchants.saas.service.impl.WorkSheetSaasServiceImpl.workSheetSave2(WorkSheetSaasServiceImpl.java:1389)

    at com.xinchan.xcauto.merchants.saas.service.impl.WorkSheetSaasServiceImpl$$FastClassBySpringCGLIB$$b3d46479.invoke(<generated>)

    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)

    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:746)

    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)

    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:294)

    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:98)

    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)

    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:688)

    at com.xinchan.xcauto.merchants.saas.service.impl.WorkSheetSaasServiceImpl$$EnhancerBySpringCGLIB$$641bc059.workSheetSave2(<generated>)

    at com.xinchan.xcauto.merchants.common.controller.WorkSheetCommonController.workSheetSave2(WorkSheetCommonController.java:108)

    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:209)

    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)

    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)

    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:877)

    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:783)

    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)

    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991)

    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925)

    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:974)

    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:877)

    at javax.servlet.http.HttpServlet.service(HttpServlet.java:661)

    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:851)

    at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)

    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:52)

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)

    at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics(WebMvcMetricsFilter.java:158)

    at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics(WebMvcMetricsFilter.java:126)

    at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:111)

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

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)

    at org.springframework.boot.actuate.web.trace.servlet.HttpTraceFilter.doFilterInternal(HttpTraceFilter.java:90)

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

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)

    at com.xinchan.xcauto.core.config.filter.HttpServletRequestReplacedFilter.doFilter(HttpServletRequestReplacedFilter.java:32)

    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:99)

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

    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.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:109)

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

    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.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93)

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

    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:147)

    at org.springframework.session.web.http.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:81)

    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:200)

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

    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:198)

    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)

    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:496)

    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)

    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)

    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)

    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)

    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803)

    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)

    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790)

    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1468)

    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.IllegalArgumentException: 'Content-Type' cannot contain wildcard type '*'

    at org.springframework.util.Assert.isTrue(Assert.java:116)

    at org.springframework.http.HttpHeaders.setContentType(HttpHeaders.java:852)

    at org.springframework.http.converter.AbstractHttpMessageConverter.addDefaultHeaders(AbstractHttpMessageConverter.java:253)

    at org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:208)

    at org.springframework.cloud.openfeign.support.SpringEncoder.encode(SpringEncoder.java:94)

    at feign.ReflectiveFeign$BuildEncodedTemplateFromArgs.resolve(ReflectiveFeign.java:345)

    ... 88 common frames omitted

服务A中定义的feign接口如下：

/**

 * @author zhangboqing

 * @date 2018/11/2

 *

 * 商品相关的服务接口

 *

 */

//定义一个feign接口，通过@ FeignClient（“服务名”），来指定调用哪个服务

//@FeignClient(value = "common-wx",fallback = XcautoCommonWXApiHystric.class)

@FeignClient(name = "merchant-backend",fallback = XcautoMerchantBackendGoodsApiHystric.class)

@Component

public interface XcautoMerchantBackendGoodsApiService {

    /**

     * 商品出库接口

     * @param deliverySaleDTO

     * @return

     */

    @PostMapping(value = "/goods/delivery/sale/v1")

    public Object saleGoods(@RequestBody DeliverySaleDTO deliverySaleDTO);

}

二、解决方法：

在调用方接口方法，指定消费类型就可以了。

将    @PostMapping(value = "/goods/delivery/sale/v1")

替换为：@PostMapping(value = "/goods/delivery/sale/v1",consumes = MediaType.APPLICATION_JSON_VALUE)

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