问题描述：多个接口上的@FeignClient(“相同服务名”)会报错，overriding is disabled。
使用的版本 SpringBoot: 2.1.4.RELEASE，SpringCloud: Greenwich.SR1，OpenFeign: 2.1.1.RELEASE
The bean 'eureka-provider.FeignClientSpecification', defined in null, could not be registered.
A bean with that name has already been defined in null and overriding is disabled.
解决办法1：
在 application.yml 中添加
spring:
main:
allow-bean-definition-overriding: true
参考连接：
