Error "Communication with the Tableau Protocol Server process was lost" Connecting to Oracle

Published: 11 Apr 2014
Last Modified Date: 21 Jan 2020


When connecting to an Oracle database, the following error might occur:
The connection to the data source might have been lost. 
Communication with the Tableau Protocol Server process was lost. 
Unable to connect to the server. Check that the server is running and that you have access privileges to the requested database.


  • Tableau Desktop
  • Oracle
  • Oracle Client


Option 1

Install the Oracle driver from the Drivers & Activation page.

Option 2

For MacOS and Tableau Desktop: after making sure that recent drivers are installed, first uninstall then reinstall Java on the computer running Tableau Desktop.
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