title: Python exception: error: [Errno 10054] An existing connection was forcibly closed by the remote host
body: <p>I have recently installed predictionio for recommendations on vagrant box. I'm fairly new to it. When I try to run its python sample file import_eventserver, I run into the following error:</p>
  
  <pre><code>C:\HashiCorp\Vagrant\PredictionIO-Vagrant-0.8.2\MyRecommendation&gt;python data/imp
  ort_eventserver.py --access_key some_access_key
  Namespace(access_key='some_access_key', file='./data/sample_movielens_data.txt', url='http://localhost:7070')
  </code></pre>
  
  <p>Importing data...</p>
  
  <pre><code>Traceback (most recent call last):
    File "data/import_eventserver.py", line 76, in &lt;module&gt;
      import_events(client, args.file)
    File "data/import_eventserver.py", line 45, in import_events
      target_entity_id=data[1]
    File "C:\Anaconda\lib\site-packages\predictionio-0.8.3-py2.7.egg\predictionio\
  __init__.py", line 243, in create_event
      event_time).get_response()
    File "C:\Anaconda\lib\site-packages\predictionio-0.8.3-py2.7.egg\predictionio\
  connection.py", line 113, in get_response
      self._response = self.rfunc(tmp_response)
    File "C:\Anaconda\lib\site-packages\predictionio-0.8.3-py2.7.egg\predictionio\
  __init__.py", line 120, in _acreate_resp
      (response.error, response.request))
  predictionio.NotCreatedError: Exception happened: [Errno 10054] An existing conn
  ection was forcibly closed by the remote host for request POST /events.json?acce
  ssKey=some_access_key {'eventTime': '2015-01-26T02:16:36.285+0000', 'entityType': 'user', 'targetEntityType': '
  item', 'targetEntityId': '2', 'entityId': '0', 'event': 'buy'} /events.json?acce
  ssKey=enFymhjuV3ighOz9R3u3FuiWSHNgWch241WbaTaXpdXyNJbKp5tYWO5IplkxUvR7?eventTime
  =2015-01-26T02%3A16%3A36.285%2B0000&amp;entityType=user&amp;targetEntityType=item&amp;target
  EntityId=2&amp;entityId=0&amp;event=buy
  </code></pre>
  
  <p>Any ideas on how to know whats wrong here? Any help is appreciated. </p>