ORA-12638: Credential retrieval failed

Hi,

Sometimes You can get “ORA-12638: Credential retrieval failed ” error.

 

ORA-12638: Credential retrieval failed

 

Details of error are as follows.

ORA-12638: Credential retrieval failed
Cause: The authentication service failed to retrieve the credentials of a user.
Action: Enable tracing to determine the exact error.

 

 

 

 

SQLNET.ORA

To solve this problem, change SQLNET.AUTHENTICATION_SERVICES= (NTS) parameter to SQLNET.AUTHENTICATION_SERVICES = (NONE) on sqlnet.ora under $ORACLE_HOME/NETWORK/ADMIN directory.

The old value is as follows.

SQLNET.AUTHENTICATION_SERVICES= (NTS)

The new value should be as follows.

SQLNET.AUTHENTICATION_SERVICES= (NONE)

 

Do you want to learn more details about RMAN, then read the following articles.

RMAN Tutorial | Backup, Restore and Recovery Tutorials For Beginner Oracle DBA

 

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About Mehmet Salih Deveci

I am Founder of SysDBASoft IT and IT Tutorial and Certified Expert about Oracle & SQL Server database, Goldengate, Exadata Machine, Oracle Database Appliance administrator with 10+years experience. I have OCA, OCP, OCE RAC Expert Certificates I have worked 100+ Banking, Insurance, Finance, Telco and etc. clients as a Consultant, Insource or Outsource. I have done 200+ Operations in this clients such as Exadata Installation & PoC & Migration & Upgrade, Oracle & SQL Server Database Upgrade, Oracle RAC Installation, SQL Server AlwaysOn Installation, Database Migration, Disaster Recovery, Backup Restore, Performance Tuning, Periodic Healthchecks. I have done 2000+ Table replication with Goldengate or SQL Server Replication tool for DWH Databases in many clients. If you need Oracle DBA, SQL Server DBA, APPS DBA,  Exadata, Goldengate, EBS Consultancy and Training you can send my email adress mehmetsalih.deveci@outlook.com. -                                                                                                                                                                                                                                                 - Oracle DBA, SQL Server DBA, APPS DBA,  Exadata, Goldengate, EBS ve linux Danışmanlık ve Eğitim için  mehmetsalih.deveci@outlook.com a mail atabilirsiniz.

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