Last updated on MAY 25, 2017
Applies to:
Oracle Database - Enterprise Edition - Version 9.0.1.0 to 11.2.0.3 [Release 9.0.1 to 11.2]Information in this document applies to any platform.
***Checked for relevance on 23-May-2016***
Symptoms
You have set undo_management=AUTO
You have set undo_tablespace = and either this tablespace does not exist or it is not created with 'undo' keyword. This may be because you either dropped and did not recreate the undo tablespace or recreated it without specifying 'undo' keyword.
With this configuration the database will not start and throws an error:
ORA-30012: undo tablespace 'UNDOTBS' does not exist or of wrong type
Changes
The undo tablespace was dropped and was not recreated or recreated without specifying the 'undo' keyword.
Cause
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