首先看feign client代码:

  

@FeignClient(name = "SPRING-CLOUD-WEB-PROVIDER-GROUP2", url = "http://localhost:8761/")
public interface SongFeignClientWithUrl {
/*@GetMapping("/call/{id}")
public Object getSongInfo(@PathVariable("id") int id);*/ @RequestMapping(value = "/eureka/apps/{serviceName}", method = RequestMethod.GET)
public Object findServiceInfoFromEurekaByServiceName(@RequestParam(value = "serviceName") String serviceName);
}

上面实际是从eureka中查询service的节点服务信息

如下是controller代码:

  

@GetMapping("/{serviceName}")
public Object findServiceInfoFromEurekaByServiceName(/*@PathVariable("serviceName")*/ String serviceName) { return songFeignClientWithUrl.findServiceInfoFromEurekaByServiceName(serviceName); }

问题就出在Controller入参String serviceName,注解被注释或者没有加@PathVariable注解,导致入参取不到值,feign client拿到的也是null,报的这个错。。。

当然,如果返回数据太大也会报400

fegin client使用http url合约时报: [Request processing failed; nested exception is feign.FeignException: status 400 reading的更多相关文章

  1. Spring Cloud ZooKeeper集成Feign的坑2,服务调用了一次后第二次调用就变成了500,错误:Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is com.n

    错误如下: 2017-09-19 15:05:24.659 INFO 9986 --- [ main] s.c.a.AnnotationConfigApplicationContext : Refre ...

  2. HTTP Status 500 - Request processing failed; nested exception is org.springframework.jdbc.BadSqlGram

    HTTP Status 500 - Request processing failed; nested exception is org.springframework.jdbc.BadSqlGram ...

  3. 报错 500 - Request processing failed; nested exception is com.alibaba.dubbo.rpc.RpcException的解决放案

    版权声明:本文为博主原创文章,遵循 CC 4.0 BY-SA 版权协议,转载请附上原文出处链接和本声明.本文链接:https://blog.csdn.net/loveliness_peri/artic ...

  4. Request processing failed; nested exception is org.springframework.dao.InvalidDataAccessApiUsageException: Multiple representations of the same entity解决方法

    1.错误信息 Request processing failed; nested exception is org.springframework.dao.InvalidDataAccessApiUs ...

  5. HTTP Status 500 - Request processing failed; nested exception is org.hibernate.exception.GenericJDBCException: could not execute statement

    1.什么操作出现:当我在项目中添加产品或者修改时,浏览器出现HTTP Status 500 - Request processing failed; nested exception is org.h ...

  6. 错误:严重: Servlet.service() for servlet [appServlet] in context with path [] threw exception [Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is

    严重: Servlet.service() for servlet [appServlet] in context with path [] threw exception [Request proc ...

  7. [springMVC - 1A] - Request processing failed; nested exception is org.apache.ibatis.builder.IncompleteElementException

    一月 14, 2016 1:30:07 下午 org.apache.catalina.core.StandardWrapperValve invoke严重: Servlet.service() for ...

  8. Request processing failed; nested exception is org.apache.ibatis.binding.BindingException: Invalid b

    Request processing failed; nested exception is org.apache.ibatis.binding.BindingException: Invalid b ...

  9. org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.jdbc.BadSqlGrammarException: Unknown column 'viewpoint' in 'field list'

    问题描述:当我在model中添加了一下代码以后数据库报错: 添加的代码为: private Viewpoint viewpoint; public Viewpoint getViewpoint() { ...

随机推荐

  1. P1129 [ZJOI2007]矩阵游戏(二分图,网络流)

    传送门 这推导过程真的有点可怕的说……完全想不出来…… 最终状态是$(1,1),(2,2),(3,3)...(n,n)$都有一个黑点 我们可以理解为每一个行和列都形成了一个匹配 换句话说,只要$n$行 ...

  2. postgreSQL PL/SQL编程学习笔记(四)

    Errors and Messages 1. Reporting Errors and Messages Use the RAISE statement to report messages and ...

  3. 使用webpack开发ES6程序的正确姿势

    1.cnpm install babel-loader babel-core babel-preset-es2015 -D 2.cnpm install babel-plugin-transform- ...

  4. 关于 Linq to EF 的内存泄漏问题

    查到一些解决方案:             1, http://www.codethinked.com/keep-your-iqueryable-in-check 自定义常用方法,屏蔽IQuery功能 ...

  5. 阻止datagrid填充已经获取到的远程数据

    时光流逝,弹指挥间,不经意的一年又如路上一个动人的靓影悄然消失在视线里.我们往往都是先问自己,我们收获了什么,然后才想到我们付出了什么,很少有人先问自己这一年付出了什么,然后再去看所得.话不多说了,祝 ...

  6. [POI2007]ZAP-Queries 数学

    题目描述 Byteasar the Cryptographer works on breaking the code of BSA (Byteotian Security Agency). He ha ...

  7. Httprequest 添加Cookie

    string postData = "Inputs={\"BarCode\":\"" + barCode + "\"}" ...

  8. 递归缓存技术,缓存机制Memoization

    先看一下代码: 再看一下执行时间: 可以看出第一个阶乘的执行时间是3ms,后面的由于缓存了之前的计算结果,所以直接返回结果. 原理就是缓存之前的计算,避免重复计算.关键在于建立缓存数组. 可以看一下执 ...

  9. Android Studio 常用应用

    1.在控制台的Logcat中输出测试语句 package com.example.lucky.helloworld; import android.support.v7.app.AppCompatAc ...

  10. elementui 给 左侧功能栏 加上 el-scroll 时 , el-main 会 挤压 左侧导航栏..

    解决方法... el-main 给上 style='width:0'........... 并不会影响 el-main 布局...