应用程序数字海洋Rails部署收到的响应不完整

Question

我已经在Ubuntu 16上使用Capistrano，Nginx和Phusion Passenger将Rails应用程序部署到数字海洋，我收到以下错误：

iptables stopped (service iptables stop)  
SELinux disabled (got to /etc/selinux/config and disbaled the selinux)   
curl/wget localhost:7180 works (check the curl status)  
ufw allow 7180  
service httpd status should be running.  
check va/log/cloudera-scm-server log : if any error found then troubleshoot the error      
cloudera-scm-server status (should be running state)
netstat -nap | grep 7180 returns  (if running other service then kill it)