Oracle Database Error ACFS-07123: Duplicate Node Entries

📋

Description

This error indicates an internal inconsistency within the Oracle ACFS (ASM Cluster File System) metadata. It occurs when the file system's internal locator structure contains duplicate entries for a specific node number, suggesting data corruption or an invalid state. This can prevent ACFS operations or mount points from functioning correctly.

💬

Error Message

_Locator structure has duplicate entries for node number 
for structure:
 string

🔍

Known Causes

3 known causes

⚠️

ACFS Metadata Corruption

Unexpected power failures, hardware issues, or sudden system crashes can lead to corruption in the ACFS internal metadata structures, resulting in duplicate node entries.

⚠️

Oracle Software Bug

Specific bugs within the Oracle ACFS software or issues encountered during patch application might introduce inconsistencies into the locator structure.

⚠️

Improper ACFS Shutdown

Abrupt or incorrect unmounting of ACFS file systems can leave metadata in an inconsistent state, leading to duplicate entries upon subsequent operations or mounts.

🛠️

Solutions

Coming Soon

Detailed 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

Find Help

Stack Overflow Google Search Official Docs