Oracle® Database 11g / 12c / 18c error codes ORA-01538: failed to acquire any rollback segment

ORA-01538: failed to acquire any rollback segment

Oracle Error Code: ORA-01538

Cause: Failed to acquire any rollback segment during startup in shared mode

Action: Startup in exclusive mode to create one more public segment or specify available private segments in the INIT.ORA parameter rollback_segments_required, then startup in shared mode