Error
Error Code:
ORA-29740
Oracle Eviction Error
Description
The ORA-29740 error indicates that an Oracle instance has been evicted from the cluster database group. This eviction is triggered by another instance due to communication issues or failure to send heartbeats to the control file.
Error Message
ORA-29740: evicted by instance number string , group incarnation string
Known Causes
4 known causesCommunication Failure
Network connectivity problems between cluster nodes can lead to missed heartbeats and instance eviction. This can occur due to network congestion or hardware failure.
Control File Access Issue
If an instance cannot reliably access the control file to issue heartbeats, it may be evicted. This is often related to storage problems or file corruption.
Instance Hang/Unresponsiveness
An unresponsive or hung instance may fail to send heartbeats, leading to its eviction by other cluster members. This is frequently a result of resource contention or application errors.
Resource Overload
Excessive CPU, memory, or I/O usage can prevent an instance from performing its required functions, including heartbeat transmission.
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