服务 A 调用服务 B 接口，返回 ResponseEntity 数据异常

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服务提供者 A 返回 ResponseEntity 封装的 json 数据。服务调用者 B，调用服务提供者 A，同样返回 ResponseEntity 给前端。服务 A 调用服务 B 接口，返回 ResponseEntity 数据异常。

之前方式：返回数据上加 responbody 注解返回 json 数据，这种远程调用是没问题。现在使用 spring 提供的 ResponseEntity，调用接口，单独调用自身是没有问题。服务间相互调用是会报错。

服务提供者 A：

  @GetMapping
    public ResponseEntity<List<Payment>> getPayment(Payment payment) {
        QueryWrapper<Payment> paymentQueryWrapper = new QueryWrapper<>();
        paymentQueryWrapper.setEntity(payment);
        List<Payment> list = paymentService.list(paymentQueryWrapper);
        return ResponseEntity.ok(list);
    }

服务提供者单独调用接口，可以正常返回数据。

服务调用者 B Controlelr:

@RestController
@RequestMapping("order")
@Slf4j
public class OrderFeignController {

    @Resource
    private IPaymentService paymentService;

    @GetMapping("feignPayment")
    public ResponseEntity<List<Payment>> getPayment(Payment payment) {
        return paymentService.getPayment(payment);
    }
}

服务调用者 B Feign 接口:

@Component
@FeignClient("cloud-payment-service")
public interface IPaymentService {

    @GetMapping()
    public ResponseEntity<List<Payment>> getPayment(Payment payment) ;
}

使用 Feign 或者 RestTemplate 调用服务 A 接口会报错，无法返回数据：

{
    "timestamp": "2020-06-15T02:55:28.978+0000",
    "status": 500,
    "error": "Internal Server Error",
    "message": "status 404 reading IPaymentService#getPayment(Payment)",
    "trace": "feign.FeignException$NotFound: status 404 reading IPaymentService#getPayment(Payment)\n\tat feign.FeignException.clientErrorStatus(FeignException.java:165)\n\tat feign.FeignException.errorStatus(FeignException.java:141)\n\tat feign.FeignException.errorStatus(FeignException.java:133)\n\tat feign.codec.ErrorDecoder$Default.decode(ErrorDecoder.java:92)\n\tat feign.SynchronousMethodHandler.executeAndDecode(SynchronousMethodHandler.java:151)\n\tat feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:80)\n\tat feign.ReflectiveFeign$FeignInvocationHandler.invoke(ReflectiveFeign.java:103)\n\tat com.sun.proxy.$Proxy115.getPayment(Unknown Source)\n\tat xyz.demo.springcloud.controller.OrderFeignController.getPayment(OrderFeignController.java:30)\n\tat sun.reflect.GeneratedMethodAccessor85.invoke(Unknown Source)\n\tat sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:45005)\n\tat java.lang.reflect.Method.invoke(Method.java:498)\n\tat org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190)\n\tat org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)\n\tat org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106)\n\tat org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:888)\n\tat org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:793)\n\tat org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)\n\tat org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040)\n\tat org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943)\n\tat org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)\n\tat org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:634)\n\tat org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:741)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\n\tat org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\n\tat org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\n\tat org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\n\tat org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:108)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\n\tat org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\n\tat org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)\n\tat org.apache.catalina.core.StandardContextValve.__invoke(StandardContextValve.java:96)\n\tat org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:41002)\n\tat org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:526)\n\tat org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)\n\tat org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)\n\tat org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)\n\tat org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)\n\tat org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:367)\n\tat org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)\n\tat org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:860)\n\tat org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1591)\n\tat org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)\n\tat java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)\n\tat java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)\n\tat org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)\n\tat java.lang.Thread.run(Thread.java:748)\n",
    "path": "/order/feignPayment"
}

第 1 条附言 · 2020-06-15 17:24:58 +08:00

答案：是 5 楼和 9 楼的解答。
服务调用者 A 的 Feign 接口调用映射应该与服务提供者 B 的接口地址对应。

12 条回复 • 2020-06-16 17:04:58 +08:00