[alibaba/tengine]TCP主动状态检查不可用于stream模块中？

stream
    {
        upstream hkbalance
        {
            server hk01.xxx.xxx:443 weight=10;
            server hk02.xxx.xxx:443 weight=20;
            check interval=3000 rise=2 fall=5 timeout=2000 type=tcp;
        }
        server
        {
            listen 60000; #
                proxy_pass hkbalance;
        }
    }

配置如上 希望达到的目的是用stream进行TCP负载均衡+状态检测 但是提示 "check" directive is not allowed here