Last updated on NOVEMBER 04, 2015
Applies to:Oracle Database - Enterprise Edition - Version 188.8.131.52 to 184.108.40.206 [Release 9.2 to 11.2]
Advanced Networking Option - Version 220.127.116.11 to 18.104.22.168 [Release 9.2 to 11.2]
Information in this document applies to any platform.
Checked for relevance on 11-Jun-2013
Kerberos authenticated network connection fails with TNS-12638 / ORA-12638: Credential retrieval failed.
Client sqlnet trace shows the failure occurs building server principal with the error "Unable to get locate hosts realm"
CHANGE NOTE: Use level 16 client network trace. The failure occurs at function nauk5lu_get_host_realm. Further down in the trace there is a message stating "Couldn't build server principal".
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