Error
Error Code:
103
MongoDB Error 103: Incompatible Replica Set Configuration
Description
Error 103 indicates that an attempt to reconfigure a MongoDB replica set failed because the proposed new configuration is incompatible with the current state or existing members. This typically occurs when applying `rs.reconfig()` with parameters that violate MongoDB's replica set consistency rules, preventing the replica set from accepting the changes.
Error Message
New Replica Set Configuration Incompatible
Known Causes
4 known causesMismatched Replica Set Name
The `_id` field in the new configuration document does not match the current replica set's name, indicating an attempt to reconfigure a different replica set.
Incorrect Member Operations
The configuration attempts to add non-existent members, remove the current primary directly, or modify member roles in an unsupported way.
Invalid Voting Member Count
The proposed configuration results in an invalid number of voting members or arbiters, violating MongoDB's rules for replica set majority and consensus.
Protocol Version Mismatch
The new configuration specifies a `protocolVersion` that is not compatible with all existing replica set members or the current MongoDB version.
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