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ORA-12638: Credential retrieval failed

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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