ORA-01031 Issued Always at First Connection Attempt (Doc ID 1279133.1)

Last updated on DECEMBER 28, 2016

Applies to:

Oracle Database - Standard Edition - Version 10.2.0.1 to 11.2.0.2 [Release 10.2 to 11.2]
Information in this document applies to any platform.
***Checked for relevance on 29-DEC-2016***

Symptoms

A first connection attempt, if using NTS authentication fails with ORA-01031.
The second connection attempt is always successful.

The sqlnet trace file for the server shows the following failure to get the username:

[29-DEC-2010 16:08:41:761] nau_gnm: entry
[29-DEC-2010 16:08:41:761] naungun: entry
[29-DEC-2010 16:08:41:761] naun5gun: entry
[29-DEC-2010 16:08:41:761] naun5gun: exit
[29-DEC-2010 16:08:41:761] naungun: exit
[29-DEC-2010 16:08:41:761] nau_gnm: username retrieval function failed with error 12630
[29-DEC-2010 16:08:41:761] nau_gnm: exit
[29-DEC-2010 16:08:41:761] nau_genm: exit
[29-DEC-2010 16:08:41:761] nazsgsnm: failed with error 12630
[29-DEC-2010 16:08:41:761] nazsgsnm: exit
[29-DEC-2010 16:08:41:761] nszgclient: returning no username
[29-DEC-2010 16:08:41:761] nszgclient: returning no username
[29-DEC-2010 16:08:41:761] nszgclient: exit
[29-DEC-2010 16:08:41:761] nszgetuser: entry
[29-DEC-2010 16:08:41:761] nszgetuser: using dedicated context
[29-DEC-2010 16:08:41:761] nazsgunm: entry
[29-DEC-2010 16:08:41:761] nau_gnm: entry
[29-DEC-2010 16:08:41:761] naungun: entry
[29-DEC-2010 16:08:41:761] naun5gun: entry
[29-DEC-2010 16:08:41:761] naun5gun: exit
[29-DEC-2010 16:08:41:761] naungun: exit
[29-DEC-2010 16:08:41:761] nau_gnm: username retrieval function failed with error 12630
[29-DEC-2010 16:08:41:761] nau_gnm: exit
[29-DEC-2010 16:08:41:761] nazsgunm: failed with error 12630
[29-DEC-2010 16:08:41:761] nazsgunm: exit
[29-DEC-2010 16:08:41:761] nszgetuser: returning no username
[29-DEC-2010 16:08:41:761] nszgetuser: exit


Typically, such an error (failure to retrieve the username) would be followed by an ORA-12638 (Credential retreival failed), but in this situation, strangely, the ORA-01031 is shown.

Cause

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