Nginx 反向代理 Golang HTTP 报错

Nginx 反向代理 Golang HTTP 报错：

http: wrote more than the declared Content-Length

Nginx 配置如下：

    location / {
        proxy_pass          http://127.0.0.1:6003;
        proxy_set_header    Host            $http_host;
        proxy_set_header    X-Real-IP       $remote_addr;
        proxy_set_header    X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_redirect      off;
    }

有哪位 v 友遇到过，该如何解决