Error
Error Code:
ORA-29701
Oracle ORA-29701: CSS Connection Failure
Description
The ORA-29701 error in Oracle Database indicates a failure to connect to the Cluster Synchronization Service (CSS). This error typically occurs during database startup or when the database attempts to communicate with the cluster infrastructure.
Error Message
ORA-29701: unable to connect to Cluster Synchronization Service
Known Causes
4 known causesCSS Not Running
The Cluster Synchronization Service (CSS) is not running or has not been started. The database relies on CSS for cluster management and synchronization.
CSS Timeout
The connection attempt to CSS timed out, possibly due to network issues or CSS being unresponsive. This can occur if CSS is overloaded or experiencing performance problems.
Network Connectivity Problems
Network connectivity issues prevent the database from reaching the CSS. This can include firewall restrictions or DNS resolution failures.
CSS Resource Exhaustion
CSS is experiencing resource exhaustion (CPU, memory) and cannot accept new connections. This may be due to other processes consuming resources.
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