RAC Instance Fails to Start With Error ORA-27504: IPC error creating OSD context
(Doc ID 1059831.1)
Last updated on JUNE 04, 2023
Applies to:
Oracle Database - Enterprise Edition - Version 9.2.0.1 and laterGen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.
Symptoms
Attempting to start a RAC instance gives ORA-27504: IPC error creating OSD context.
Other symptoms may include:
- Other errors: Any of the following may apply:
- No other errors are seen
- ORA-603 is seen as well
- "ORA-00439: feature not enabled: Real Application Clusters" is seen
- Alert log: With this issue, any of the errors seen at startup may be recorded in the instance alert log. Or, there may be no errors at all recorded in the instance alert log.
Changes
This error may arise after manual install, or after patch apply, or manual relink, or other change to the database home.
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| Community Discussions |
| References |