The bean ‘uc-service.FeignClientSpecification‘ could not be registered. A bean with that name has al

The bean ‘uc-service.FeignClientSpecification’ could not be registered. A bean with that name has already been defined and overriding is disabled.**

报错信息：

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. 
2021-03-19 15:37:36.516   --- [           main]  : 
 
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APPLICATION FAILED TO START 
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Description: 
 
The bean 'uc-service.FeignClientSpecification' could not be registered. A bean with that name has already been defined and overriding is disabled. 
 
Action: 
 
Consider renaming one of the beans or enabling overriding by setting spring.main.allow-bean-definition-overriding=true 
 

可能原因：在SpringBoot 2.1之前，这个配置默认就是true，而在2.1做了更改。
设置为true后，因为FeignClientSpecification的原因，FeignClient注解的configuration参数会被覆盖。

解决：
1.

@FeignClient(name="common-service", contextId = "example")
或@FeignClient(name="common-service", contextId = "exp")

2.在application.yml中配置：

spring:   main:
    allow-bean-definition-overriding: true