The bean ‘xxx.FeignClientSpecification‘ could not be registered. A bean with that name has already b

一、异常日志：

The bean 'xxxx.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

二、原因：
在同于一个微服务中多个feign接口使用@FeignClient注解调用同一个名称的微服务，启动时引发的异常
比如：项目中定义了两个feign接口类，但是注解都是@FeignClient(value = “userinfo-service”)为此报错了。

@Component@FeignClient(value = "base-log")public interface LogReqFeign {@PostMapping("/v1/base/log/req")ResObj postObj(@RequestBody ReqObj reqObj);@GetMapping("/v1/base/log/req")ResObj getObj(Map map);@GetMapping("/v1/base/log/req/{id}")ResObj getObjById(@PathVariable("id") Long id);}

@Component@FeignClient(value = "base-log")public interface LogEventFeign {@PostMapping("/v1/base/log/event")ResObj postObj(@RequestBody ReqObj reqObj);@GetMapping("/v1/base/log/event")ResObj getObj(Map map);@GetMapping("/v1/base/log/event/{id}")ResObj getObjById(@PathVariable("id") Long id);}

三、解决方案：
1、方案一：
将调用同一个服务的fegin接口都写到一个LogReqFeign接口类中。但是我这里不合适，我远程调用的方法都是同名的
2、方案二：
配置文件中添加配置：

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

通过设置spring.main.allow-bean-definition-overriding=true来允许bean覆盖，但是这种方式并不推荐，因为可能会导致意外的覆盖，导致应用程序出现其他问题。

3、方案三：

@FeignClient增加contextId属性，改为

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

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

@Component@FeignClient(value = "base-log",contextId = "LogEvent")public interface LogEventFeign {@PostMapping("/v1/base/log/event")ResObj postObj(@RequestBody ReqObj reqObj);@GetMapping("/v1/base/log/event")ResObj getObj(Map map);@GetMapping("/v1/base/log/event/{id}")ResObj getObjById(@PathVariable("id") Long id);}

@Component@FeignClient(value = "base-log",contextId = "LogReq")public interface LogReqFeign {@PostMapping("/v1/base/log/req")ResObj postObj(@RequestBody ReqObj reqObj);@GetMapping("/v1/base/log/req")ResObj getObj(Map map);@GetMapping("/v1/base/log/req/{id}")ResObj getObjById(@PathVariable("id") Long id);}