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Kerberos Constraint Delegation Fails with ORA-12638 On Linux Platform (Doc ID 2421596.1)

Last updated on JULY 18, 2018

Applies to:

Advanced Networking Option - Version 11.2.0.4 and later
Information in this document applies to any platform.

Symptoms

Kerberos Constrained Delegation with the latest version of Oracle OCI on Linux fails with "ORA-12638: Credential retrieval failed".

Changes

Kerberos authentication works fine for single hop but when double hop (delegation) is configured it (call to OCIServerAttach) fails with "ORA-12638: Credential retrieval failed".

NOTE: The constrained delegation works fine on Windows.

 

Cause

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