What flavor of Linux is being leveraged? I would make sure it is one of the supported flavors of Tableau Server on Linux. Also what version of Mongo is being used. As we want to try and match driver versions to MySQL versions. i.e. 5.x with 5.x etc..
Also from the MySQL site:
MySQL Connector/ODBC 8.0 is recommended for use with MySQL Server 8.0, 5.7, 5.6, and 5.5. Please upgrade to MySQL Connector/ODBC 8.0.
Hope this helps!