Instance Startup Fails With ORA-01012: Not Logged On (Doc ID 1365419.1)

Last updated on JUNE 18, 2017

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.2 and later
Information in this document applies to any platform.
**Checked for relevance 03-Feb-2016**

Symptoms

You can successfully connect as sysdba but a subsequent startup of the database fails with an ORA-1012:

/home/oracle>sqlplus / as sysdba
SQL*Plus: Release 11.2.0.2.0 Production on Thu Oct 6 11:03:24 2011
Copyright (c) 1982, 2010, Oracle.  All rights reserved.
Connected.
SQL> startup
ORA-01012: not logged on


Environment parameters like NLS_LANG , ORA_NLS33 or ORA_NLS10 have been verified and are set correctly.
 

Changes

Oracle has been forcefully shutdown at OS level or crashed.

Cause

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