Connections to NOMOUNT/MOUNTED or RESTRICTED Databases Fail
(Doc ID 362656.1)
Last updated on JANUARY 16, 2025
Applies to:
Oracle Net Services - Version 11.1.0.6 to 12.2.0.1 [Release 11.1 to 12.2]Oracle Database - Enterprise Edition - Version 12.2.0.1 to 12.2.0.1 [Release 12.2]
Oracle Database - Enterprise Edition - Version 8.0.3.0 and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Gen 2 Exadata Cloud at Customer - Version N/A and later
Information in this document applies to any platform.
Symptoms
Connecting to the database via the TNS Listener fails with ORA-1033 or ORA-12528 or ORA-12526 or ORA-12527.
Following are two examples:
Changes
The database was started using the nomount, mount but restricted mode.
In other words, the DB admin executed "STARTUP NOMOUNT" or "STARTUP MOUNT" with "STARTUP RESTRICT" to an idle instance.
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |