title: Shiny App unable to start on shiny server
body: <p>I want to deploy a <code>Shiny</code> app on the <code>Shiny server</code> but not able to access the app from the local server URL.</p>
  
  <p><a href="https://i.stack.imgur.com/qHvFz.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/qHvFz.png" alt="enter image description here"></a></p>
  
  <p>This is the output of <code>/var/log/shiny-server.log</code>:</p>
  
  <pre><code>[2016-04-11 21:39:24.302] [INFO] shiny-server - Starting listener on 0.0.0.0:3838
  [2016-04-11 21:42:29.564] [INFO] shiny-server - Error getting worker: Error: The application exited during initialization.
  [2016-04-11 21:42:29.570] [INFO] shiny-server - Error getting worker: Error: The application exited during initialization.
  [2016-04-11 21:43:15.156] [INFO] shiny-server - Error getting worker: Error: The application exited during initialization.
  [2016-04-11 21:43:15.163] [INFO] shiny-server - Error getting worker: Error: The application exited during initialization.
  [2016-04-11 21:43:28.593] [INFO] shiny-server - Error getting worker: Error: The application exited during initialization.
  [2016-04-11 21:43:28.604] [INFO] shiny-server - Error getting worker: Error: The application exited during initialization.
  [2016-04-11 21:43:54.549] [INFO] shiny-server - Error getting worker: Error: The application exited during initialization.
  [2016-04-11 21:51:52.528] [INFO] shiny-server - Error getting worker: Error: The application exited during initialization.
  [2016-04-11 21:52:20.004] [INFO] shiny-server - Error getting worker: Error: The application exited during initialization.
  [2016-04-11 21:52:20.020] [INFO] shiny-server - Error getting worker: Error: The application exited during initialization.
  [2016-04-11 21:52:26.843] [INFO] shiny-server - Error getting worker: Error: The application exited during initialization.
  [2016-04-11 21:56:10.938] [INFO] shiny-server - Error getting worker: Error: The application exited during initialization.
  [2016-04-11 21:56:10.946] [INFO] shiny-server - Error getting worker: Error: The application exited during initialization.
  </code></pre>
  
  <p>What is the problem?</p>