服务端主动关闭连接，就会进入FIN_WAIT2的状态。
现在尝试重启x2工具，查看是否报错
systemctl restart nginx_x2openEuler.service
systemctl restart gunicorn_x2openEuler.service
x2日志里面是否有相关的报错
/usr/local/x2openEuler/portal/logs/gunicorn_access.log
/usr/local/x2openEuler/portal/logs/gunicorn_error.log