RestClientException: Could not extract respon

关于feign接口返回参数错误的异常
org.springframework.web.client.RestClientException: Could not extract respon

原因:feign接口不能直接返回字符串,需要返回对象
正确代码:

public Object get() {
        HashMap map = new HashMap<>();
        map.put("code","hello");
        return map;
}

错误代码

public Object get() {
        return "map";
}