When publishing an Amazon Redshift data source with 'Required SSL' enabled to Tableau Server on Linux, or opening a published workbook that connects to a Redshift data source with 'Required SSL' enabled on Linux the following error may occur:
Unable to connect to the data source.
Try connecting again. If the problem persists, disconnect from the data source and contact the data source owner.
The connection to the data source might have been lost
ReadBytes: Communication with the Tableau Protocol Server process was lost.
Unable to connect to the Amazon Redshift server ".......". Check that the server is running and that you have access privileges to the requested database.