title: Service Unavailable. Apache2 centos 7
body: <p>I have installed apache in centos 7. PHP version 7.1 and php-fpm. I had restarted system. Afterward, apache is working but once i access any file it show me below error.</p>
  
  <p>503 service Unavailable</p>
  
  <blockquote>
    <p>Service Unavailable</p>
    
    <p>The server is temporarily unable to service your request due to
    maintenance downtime or capacity problems. Please try again later.</p>
  </blockquote>
  
  <p>Apache log:</p>
  
  <blockquote>
    <p>[Tue Nov 13 18:25:25.171750 2018] [proxy:error] [pid 13059]
    (111)Connection refused: AH00957: FCGI: attempt to connect to
    127.0.0.1:6000 (127.0.0.1) failed</p>
  </blockquote>
  
  <p>Please help me to fix this issue.</p>