Error
Error Code: ORA-29735

Oracle Error ORA-29735: Instance Missing

📦 Oracle Database
📋

Description

The ORA-29735 error indicates that a client process tried to communicate with an Oracle instance that is no longer available. This typically occurs in a Real Application Clusters (RAC) environment when an instance has been shut down or crashed unexpectedly.
💬

Error Message

ORA-29735: instance specified no longer exists
🔍

Known Causes

4 known causes
⚠️
Instance Termination
The target Oracle instance was intentionally shut down using SQL*Plus or other administration tools.
⚠️
Instance Crash
The Oracle instance experienced a critical error and terminated unexpectedly, leading to its unavailability.
⚠️
Network Connectivity Issue
A network problem prevents the client from reaching the Oracle instance, making it appear as if the instance no longer exists.
⚠️
Node Eviction
In a RAC environment, the instance may have been evicted from the cluster due to health issues or resource contention.
🛠️

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