How to fix the Oracle error ORA-01598: rollback segment ‘string’ is not online?

In this post, you’ll learn more about the Oracle ErrorORA-01598: rollback segment ‘string’ is not online with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

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

Reason for the Error ORA-01598: rollback segment ‘string’ is not online

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

How to fix the Error ORA-01598: rollback segment ‘string’ is not online ?

You can fix this error in Oracle by following the below steps

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