I would verify there is nothing changed in the network as well and maybe try uninstalling and reinstalling the drivers. I would completely remove them as well. The reinstall only one driver that is necessary for the Oracle Data source.
Hope this steps help!
Has this been resolved? We are running into the same error once upgrading to Oracle 12.2.
Hi Patrick - Apology for late response , We had to roll back the DB instance and couldn't test the suggested steps from you. We did install the latest driver after uninstalling the existing one, still no luck! Thanks!
Not yet.. Have you been able to fix it?
We have the same issue - upgraded from 11.2 to 12.2 - and get these every few seconds in the Oracle alert log. I opened an SR with Tableau Support a few months ago and was not able to get anywhere. I was advised to check Oracle Doc ID 2329165.1 and check the Tableau Oracle drivers but that did not resolve the issue. They are saying it's an Oracle issue, and Oracle says it's a Tableau issue. Not much help or progress, hoping your thread can help us though...