title: Getting NameOrService not known error when trying to load data to Data Lake Storage Gen1
body: <p>I am trying to load data to Data Lake Storage Gen1 using python but getting NameOrService not known. 
  I have created an AD application and got the client key, tenant id as mentioned in docs</p>
  
  <pre><code>adlsAccountName = '*******'
  adlCreds = lib.auth(tenant_id = '*****', client_secret = '*****', client_id ='******')
  ##Create a filesystem client object
  adlsFileSystemClient = core.AzureDLFileSystem(adlCreds, store_name=adlsAccountName)
  adlsFileSystemClient.ls('/')
  </code></pre>
  
  <p>The error i am getting is :</p>
  
  <blockquote>
    <p>azure.datalake.store.exceptions.DatalakeRESTException: HTTP error: ConnectionError(MaxRetryError("HTTPSConnectionPool(host='junipertest.azuredatalakestore.net', port=443): Max retries exceeded with url: /webhdfs/v1/.?api-version=2018-09-01&amp;listSize=4000&amp;OP=LISTSTATUS (Caused by NewConnectionError(': Failed to establish a new connection: [Errno -2] Name or service not known',))",),)</p>
  </blockquote>
  
  <p>I have tried mkdir and ls both but getting the same error.</p>