FeignException：状态 302 读取 MyService#dummy();内容：

【问题标题】：FeignException: status 302 reading MyService#dummy(); content:FeignException：状态 302 读取 MyService#dummy();内容：
【发布时间】：2017-11-23 11:44:52
【问题描述】：

我已经在 PCF 和一个 Eureka Server 中部署了我的 2 个 Spring Boot 应用程序以进行发现。我在应用程序中有@EnableEurekaClient，它们可以在 PCF 的 Eureka Server 中看到

当我使用 FeignClient 访问其他应用程序时出现错误

2017-11-23T16:54:19.745+05:30 [APP/PROC/WEB/0] [ERR] feign.FeignException: status 302 reading MyService#dummy(); content:
2017-11-23T16:54:19.745+05:30 [APP/PROC/WEB/0] [ERR] at feign.FeignException.errorStatus(FeignException.java:62)
2017-11-23T16:54:19.745+05:30 [APP/PROC/WEB/0] [ERR] at feign.codec.ErrorDecoder$Default.decode(ErrorDecoder.java:91)
2017-11-23T16:54:19.745+05:30 [APP/PROC/WEB/0] [ERR] at feign.SynchronousMethodHandler.executeAndDecode(SynchronousMethodHandler.java:138)
2017-11-23T16:54:19.745+05:30 [APP/PROC/WEB/0] [ERR] at feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:76)
2017-11-23T16:54:19.745+05:30 [APP/PROC/WEB/0] [ERR] at feign.ReflectiveFeign$FeignInvocationHandler.invoke(ReflectiveFeign.java:103)
2017-11-23T16:54:19.745+05:30 [APP/PROC/WEB/0] [ERR] at com.sun.proxy.$Proxy140.dummy(Unknown Source)
2017-11-23T16:54:19.745+05:30 [APP/PROC/WEB/0] [ERR] at com.c2m.sigma.rest.controller.MyController.sendNotification(MyController.java:70)
2017-11-23T16:54:19.745+05:30 [APP/PROC/WEB/0] [ERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2017-11-23T16:54:19.745+05:30 [APP/PROC/WEB/0] [ERR] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
2017-11-23T16:54:19.745+05:30 [APP/PROC/WEB/0] [ERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
2017-11-23T16:54:19.745+05:30 [APP/PROC/WEB/0] [ERR] at java.lang.reflect.Method.invoke(Method.java:498)
2017-11-23T16:54:19.745+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
2017-11-23T16:54:19.745+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.boot.web.filter.ApplicationContextHeaderFilter.doFilterInternal(ApplicationContextHeaderFilter.java:55)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:110)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:317)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:114)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:170)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:116)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:64)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105)
2017-11-23T16:54:19.746+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56)
2017-11-23T16:54:19.747+05:30 [RTR/1] [OUT] com.apps.np.sdppcf.com - [2017-11-23T11:24:19.486+0000] "POST /my-rest-services/api/Launch/SendNotification HTTP/1.1" 200 1235 197 "-" "Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.94 Safari/537.36" "10.192.230.112:47060" "10.192.225.14:61138" x_forwarded_for:"10.111.136.194" x_forwarded_proto:"https" vcap_request_id:"38c0d6e1-4431-4a68-604f-5330a48a53bd" response_time:0.25981493 app_id:"8d2a0aba-8378-441f-9ecd-5f6904bcdf65" app_index:"0" x_b3_traceid:"aafdb180106cebde" x_b3_spanid:"aafdb180106cebde" x_b3_parentspanid:"-"
2017-11-23T16:54:19.747+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214)
2017-11-23T16:54:19.747+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177)
2017-11-23T16:54:19.747+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:347)
2017-11-23T16:54:19.747+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:263)
2017-11-23T16:54:19.747+05:30 [APP/PROC/WEB/0] [ERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
2017-11-23T16:54:19.747+05:30 [APP/PROC/WEB/0] [ERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
2017-11-23T16:54:19.747+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
2017-11-23T16:54:19.747+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
2017-11-23T16:54:19.747+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:108)
2017-11-23T16:54:19.747+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81)
2017-11-23T16:54:19.747+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
2017-11-23T16:54:19.747+05:30 [APP/PROC/WEB/0] [ERR] at org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:106)

我的 feignClient 如下。我在这里发帖时重新命名了服务

@FeignClient(name = "my-feign-services")
public interface MyService {

    @RequestMapping(value = "/updateValues", method = RequestMethod.POST, consumes = MediaType.APPLICATION_JSON_VALUE)
    public String updateValues(@RequestBody ModelWrapper odelWrapper);

    @RequestMapping(value = "/dummy", method = RequestMethod.GET)
    public String dummy();

}

我还启用了 Spring Security，它也允许匿名请求。

protected void configure(HttpSecurity http) throws Exception {
        http.httpBasic().disable().authorizeRequests()
        .antMatchers("/my-feign-services/**").anonymous()
        .and()
        .authorizeRequests().anyRequest()
        .authenticated().and().csrf().disable();
    }

FeignClient 不能在 PCF 中工作的任何原因。在 localhost 中它工作正常，我可以轻松地在 2 个服务之间进行通信，但在 PCF 中同样失败

我在配置类中使用 FeignLogger 启用了 Feign Logging，并在 Feign Client 中添加。该位置在日志中正确显示，但由于错误 302 和 :content 失败。

更新：

在配置类中添加 URL 后，它起作用了。在平台团队在 Cloud Foundry 获得 Spring Cloud 服务之前，这是一个权宜之计。

【问题讨论】：

    标签： spring cloud-foundry


    【解决方案1】：

    302 错误表示重定向。您可以尝试查看响应中的 Location 标头是什么吗？您可能没有配置 feign 来跟踪重定向。

    【讨论】：

    • 我正在使用 POSTMAM 来触发请求广告，因为它在 PCF 中内部调用，所以它没有给出位置。任何关于如何记录 Location 标头的建议。
    • 邮递员自动跟随重定向。您可以关闭设置
    【解决方案2】：

    不知道为什么，但是 feign-core 只认为没有错误，HTTP 状态在 200 到 299 之间

    所有其他状态都会抛出一个 ErrorDecoder（除了 404 有特殊处理）

    我在使用 Feign 时遇到了同样的问题，我已经自定义了 FeignErrorHandler 以正确处理它。

    @Bean
public MyClient myClient() {
    return  Feign.builder()
            .errorDecoder(new CustomFeignErrorHandler()) // <== custom handler here
            .encoder(new JacksonEncoder())
            .decoder(new JacksonDecoder())
            .logger(new Slf4jLogger())
            .target(myClient.class, url);
}

    【讨论】：

      【解决方案3】：

      我还尝试通过添加一个新的 Dummy 服务进行调试，但它也因相同的 FeignException 而失败。看起来 PCF 中的服务注册表存在问题。我有一个备份代码，我将我的其他代码迁移到这个并进行了测试，它运行良好。我能够进行 MS - MS 通信没有错误并且也收到了响应。

      【讨论】：

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