The bean 'xxx.FeignClientSpecification' could not be registered. A bean with that name has already been defined and overriding is disabled.

报错信息如下：

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APPLICATION FAILED TO START
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Description:
The bean 'xxx.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

报错说明：FeignClientSpecification重复注入，考虑设置  spring.main.allow-bean-definition-overriding=true

原因分析：这个报错是因为在我的SpringBoot项目中（springcloud项目，使用的consul+feignClient），需要调用统一个微服务XXX的两个业务模块的接口

代码如下：

@FeignClient(name = "xxx", path = API.PATH)
public interface AService  {
}

@FeignClient(name = "xxx", path = API.PATH)
public interface BService {
}

其中A和B是XXX微服务里的两块业务，都需要用到里面的接口

每个@FeignClient注解对应的接口，在服务启动时都会生成一个FeignClientSpecification，由于他们的name又一样，并且我的SpringBoot项目版本是2.5.13，

默认 spring.main.allow-bean-definition-overriding这个属性是false,因此报错bean重复注入

解决方案：

第一种根据提示 ，设置spring.main.allow-bean-definition-overriding = true ,太过暴力，因为别人的业务注入的重名bean可能不允许覆盖

第二种，@FeignClient增加contextId属性，改为

@FeignClient(name = "xxx", path = API.PATH，contextId="xxx1")

@FeignClient(name = "xxx", path = API.PATH，contextId="xxx2")