I’m changing the UNDO_TABLESPACE in a database, to reconfigure the files that are being used. Upon receipt the drop tablespace error that below. I previously ensured that there are no active transactions in the database, so that there is no segment rollback in state “pending offline”;
ORCLTEST> DROP TABLESPACE UNDO_TS INCLUDING CONTENTS AND DATAFILES; DROP TABLESPACE UNDO_TS INCLUDING CONTENTS AND DATAFILES * ERROR en línea 1: ORA-30013: el tablespace de deshacer 'UNDO_TS' está en uso actualmente
The problem in this case is the UNDO_RETENTION parameter, which is somewhat high. After spending the indicated time can drop tablespace and datafiles smoothly.
HTH – Antonio NAVARRO