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

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。

@***ponent
@FeignClient(value = "base-log")
public interface LogReqFeign {

    @PostMapping("/v1/base/log/req")
    ResObj postObj(@RequestBody ReqObj<LogReq> reqObj);

    @GetMapping("/v1/base/log/req")
    ResObj getObj(Map<String, Object> map);

    @GetMapping("/v1/base/log/req/{id}")
    ResObj getObjById(@PathVariable("id") Long id);
    
}
@***ponent
@FeignClient(value = "base-log")
public interface LogEventFeign {

    @PostMapping("/v1/base/log/event")
    ResObj postObj(@RequestBody ReqObj<LogEvent> reqObj);

    @GetMapping("/v1/base/log/event")
    ResObj getObj(Map<String, Object> 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")
@***ponent
@FeignClient(value = "base-log",contextId = "LogEvent")
public interface LogEventFeign {

    @PostMapping("/v1/base/log/event")
    ResObj postObj(@RequestBody ReqObj<LogEvent> reqObj);

    @GetMapping("/v1/base/log/event")
    ResObj getObj(Map<String, Object> map);

    @GetMapping("/v1/base/log/event/{id}")
    ResObj getObjById(@PathVariable("id") Long id);
}
@***ponent
@FeignClient(value = "base-log",contextId = "LogReq")
public interface LogReqFeign {

    @PostMapping("/v1/base/log/req")
    ResObj postObj(@RequestBody ReqObj<LogReq> reqObj);

    @GetMapping("/v1/base/log/req")
    ResObj getObj(Map<String, Object> map);

    @GetMapping("/v1/base/log/req/{id}")
    ResObj getObjById(@PathVariable("id") Long id);

}

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