TNS Database Error Messages TNS-12631: Username retrieval failed December 17, 2020 mpbod TNS-12631: Username retrieval failed Cause: The authentication service failed to retrieve the name of a user. Action: Enable tracing to determine which routine is failing. Back to previous menu https://support.oracle.com/ http://www.oracle.com/ Share this:Click to email a link to a friend (Opens in new window)Click to print (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)