Oracle Error ORA-01598: rollback segment ‘string’ is not online

Oracle Error Message

ORA-01598: rollback segment ‘string’ is not online

Reason for the Error

Could have been taken offline before by DBA or cleaned up by SMON.

Solution

Check the status of rollback segment in undo$ or dba_rollback_segs to make sure the rollback segment is actually online.

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