Re: ORA-12638 Error when starting instance

From: Jarett <nospam_at_uglyduck.com>
Date: Fri, 22 Mar 2002 22:48:23 -0500
Message-ID: <u9nuol51p0v69c@corp.supernews.com>

Set your services default user to the LOCAL administrator, not just a local user. do the same with the DB Service, and listener services.

This is bug 1318637. This looks to be an internal bug, but the important notes of this bug are:

 Windows 2000

---

 Oracle's Windows Native Authentication Adapter(NTS) uses Kerberos as the  authentication mechanism on Windows 2000.  .
 The KDC (Key Distribtion Centre) needed for Kerberos Authentication is only  installed on a Windows 2000 domain controller. When Windows 2000 is installed
 as a standalone machine, this Win2000 machine will not be able to  reach a KDC. Also, if the Win2000 machine is installed in a Win2000 domain,  but if the user logs in as a local user on the Win2000 machine, then also the
 Win2000 machine cannot get to the KDC to get a ticket. So in both these cases
 NTLM has to be used as the authentication mechanism instead of Kerberos.

It is fixed in 8.1.6.3.1, via a backport request bug # 1611789

Jarett Kulm § Oracle DBA for hire
http://www.uglyduck.com

"Operations" <dbz_outlawstar74_at_yahoo.com> wrote in message news:3efe93f9.0203212053.1bb0a0d9_at_posting.google.com...
> I have a Win2000 Server, 3 Oracle 8.1.6i databases. The services for
> each database are starting up fine. When I start the instance for any
> of the databases I receive the following errors:
>
> ORA-12638: Credential retrieval failed
> ORA-12638: Credential retrieval failed
> LCC-00161: Message 161 not found; product=RDBMS; facility=MGR
>
> ORA-12638: Credential retrieval failed
> ORA-12638: Credential retrieval failed
>
> This started happening after a reboot, the only change that has been
> made is that of the local Administrator password and the Domain Admin
> password.
>
> I have tried changing the line in sqlnet.ora to the following:
> sqlnet.authentication_services = (NONE)
>
> This did not work and I changed it back to:
> sqlnet.authentication_services = (NTS)
>
> I would like to leave it that way as everything was working perfectly
> before the password changing of the Administrators. I had also changed
> the local administrator's password back to what it used to be, the
> error is the same as above.
>
> Thanks!
>
> -paul
Received on Fri Mar 22 2002 - 21:48:23 CST