The bean ‘xxx.FeignClientSpecification‘ could not be registered. A bean with that name has already b
作者:mmseoamin日期:2023-12-14

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);
}