title: Unable to connect to a running H2o Server from Python [H2O.ai]
body: <p>Error on connecting to H2o server running on EMR core node from master node.</p>
  
  <pre><code>import h2o
  h2o.connect(url="http://IP:54321")
  </code></pre>
  
  <p>Error Trace</p>
  
  <pre><code>Connecting to H2O server at http://IP:54321... successful.
  Traceback (most recent call last):
    File "/home/hadoop/TataCliqEMR/app/__init__.py", line 3, in &lt;module&gt;
      h2o.connect(ip="IP", port=54321)
    File "/usr/local/lib/python3.4/site-packages/h2o/h2o.py", line 86, in connect
      h2oconn.cluster.show_status()
    File "/usr/local/lib/python3.4/site-packages/h2o/backend/cluster.py", line 190, in show_status
      ["H2O internal security:",     self.internal_security_enabled],
    File "/usr/local/lib/python3.4/site-packages/h2o/backend/cluster.py", line 121, in internal_security_enabled
      return self._props["internal_security_enabled"]
  KeyError: 'internal_security_enabled'
  </code></pre>
  
  <p><a href="https://community.h2o.ai/questions/1921/h2o-python-can-not-connect-to-an-existing-h2o-serv.html" rel="nofollow noreferrer">It's also unanswered here</a></p>