How to Troubleshoot ORA -12638 / ORA -12631 with Database User Authentication?
(Doc ID 2724945.1)
Last updated on NOVEMBER 23, 2020
Applies to:Oracle Database Cloud Exadata Service - Version N/A and later
Advanced Networking Option - Version 188.8.131.52 to 184.108.40.206 [Release 12.2]
Oracle Database - Enterprise Edition - Version 10.2.0.1 and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.
This document is meant to list some known causes and solutions for the errors ORA-12638, ORA-12631 encountered with OS User authentication to Database and the troubleshooting steps one can use to identify the cause of the problem.
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In this Document
|ORA-12638: Credential retrieval failed|
|ORA-12631: Username retrieval failed|