为什么 nginx 转发链接不成功，报 500 错误

[foreverdk]

server
{
listen 7005;
server_name abc.com;

location / {
proxy_set_header Host $host:$proxy_port;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_pass http://xxx.abc.com/abc/xyz.do; (该原地址点击有个?goto=http%3A%2F%2F 跳转)
}
}