Error
Error Code:
ORA-28456
Oracle Encryption Mismatch
Description
The ORA-28456 error indicates an incompatibility between encrypted tablespace files and the database's `TABLESPACE_ENCRYPTION` setting. This error occurs when the database is configured with `TABLESPACE_ENCRYPTION=DECRYPT_ONLY` while encrypted tablespace files are present.
Error Message
ORA-28456: ENCRYPTED files found with TABLESPACE_ENCRYPTION is set to DECRYPT_ONLY.
Known Causes
3 known causesIncompatible Encryption Setting
The database is started with `TABLESPACE_ENCRYPTION=DECRYPT_ONLY` but has encrypted tablespaces that have not been fully decrypted.
Migration/Upgrade Issues
During a database migration or upgrade, the encryption settings were not correctly transitioned, leading to a mismatch.
Accidental Encryption
Tablespaces were unintentionally encrypted, and the database is now configured to only decrypt.
Solutions
Coming SoonDetailed step-by-step solutions for this error are being prepared. In the meantime, try these general troubleshooting tips:
General Troubleshooting Tips
- Check the error message carefully for specific details
- Review recent changes that might have caused the error
- Search for the exact error code in the official documentation
- Check log files for additional context
- Try restarting the application or service