fegin client使用http url合約時報： [Request processing failed; nested exception is feign.FeignException: status 400 reading

首先看feign client代碼：

　　

@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);
}

上面實際是從eureka中查詢service的節點服務信息

 

如下是controller代碼：

　　

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

 

問題就出在Controller入參String serviceName，注解被注釋或者沒有加@PathVariable注解，導致入參取不到值，feign client拿到的也是null，報的這個錯。。。

 

當然，如果返回數據太大也會報400