title: INFO: I/O exception (java.io.IOException) caught when processing request to {}->unix://localhost:80: Permission denied
body: <p>when try to build a Docker image of a jhipster application on Ubuntu. got error:</p>
  
  <pre><code>INFO: Retrying request to {}-&gt;unix://localhost:80
  Jan 12, 2017 11:45:49 AM org.apache.http.impl.execchain.RetryExec execute
  INFO: I/O exception (java.io.IOException) caught when processing request to {}-&gt;unix://localhost:80: Permission denied
  Jan 12, 2017 11:45:49 AM org.apache.http.impl.execchain.RetryExec execute
  INFO: Retrying request to {}-&gt;unix://localhost:80
  [INFO] ------------------------------------------------------------------------
  [INFO] BUILD FAILURE
  [INFO] ------------------------------------------------------------------------
  [INFO] Total time: 01:19 min
  [INFO] Finished at: 2017-01-12T11:45:49-06:00
  [INFO] Final Memory: 77M/730M
  [INFO] ------------------------------------------------------------------------
  [ERROR] Failed to execute goal com.spotify:docker-maven-plugin:0.4.13:build (default-cli) on project poetry: Exception caught: java.util.concurrent.ExecutionException: com.spotify.docker.client.shaded.javax.ws.rs.ProcessingException: java.io.IOException: Permission denied -&gt; [Help 1]
  </code></pre>