title: hue said Resource Manager not available error but running fine
body: <p>when i run the quick start met the error message</p>
  
  <pre><code>Potential misconfiguration detected. Fix and restart Hue.
  
  Resource Manager : Failed to contact an active Resource Manager: YARN RM returned a failed response: HTTPConnectionPool(host='localhost', port=8088): Max retries exceeded with url: /ws/v1/cluster/apps?user=hue (Caused by NewConnectionError(': Failed to establish a new connection: [Errno 111] Connection refused',))
  
  Hive : Failed to access Hive warehouse: /user/hive/warehouse
  
  HBase Browser : The application won't work without a running HBase Thrift Server v1.
  
  Impala : No available Impalad to send queries to.
  
  Oozie Editor/Dashboard : The app won't work without a running Oozie server
  
  Pig Editor : The app won't work without a running Oozie server
  
  Spark : The app won't work without a running Livy Spark Server
  </code></pre>
  
  <p>i don't know why hue said error for resource manager.</p>
  
  <p>i didn't install another things yet.</p>
  
  <p>my resource manager is running and that api is no problem this - <code>http://RMHOST:8088/ws/v1/cluster/apps?user=hue</code></p>
  
  <p>response is </p>
  
  <pre><code>{
   "apps": null
  }
  </code></pre>
  
  <p>is there any problem i missed?</p>