Error creating bean with name 'com.cloud.feign.interfaces.xxxFeignClient': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalSt.PathVariable annotation was empty on

环境：

　　Spring Cloud：Finchley.M8

　　Spring Boot：2.0.0.RELEASE

报错信息：

　　

Error creating bean with name 'com.cloud.feign.interfaces.xxxFeignClient': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalSt.PathVariable annotation was empty on

Feign接口代码：

@FeignClient(value = "SPRING-CLOUD-WEB-PROVIDER-GROUP2")
public interface SongFeignClient {
    @GetMapping("/call/{id}")
    public Object getSongInfo(@PathVariable int id);
}

报错信息关键点：

　　

PathVariable annotation was empty on

　　

问题就出在接口方法入参@PathVariable注解这里，在Spring Mvc中可以不明确指定该注解对应的参数名称，但在feign中必须指定，否则将保如上异常，修后的正确代码如下：

@FeignClient(value = "SPRING-CLOUD-WEB-PROVIDER-GROUP2")
public interface SongFeignClient {
    @GetMapping("/call/{id}")
    public Object getSongInfo(@PathVariable("id") int id);
}