ORA-1548 Dropping UNDO Tablespace Distributed Transaction Pending:Prepared / Dead (Doc ID 1321093.1)

Last updated on JULY 21, 2017

Applies to:

Oracle Database - Enterprise Edition - Version 9.2.0.1 to 11.2.0.2 [Release 9.2 to 11.2]
Information in this document applies to any platform.
***Checked for relevance on 21-Jul-2017***

Symptoms

After creating a new Undo Tablespace, you are trying to drop the old Undo Tablespace and are getting the following error:

ORA-01548: active rollback segment '_SYSSMU51$' found, terminate dropping

Cause

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