Error
Error Code:
126
MongoDB Error 126: RPC Protocol Negotiation Failure
Description
This error indicates that the MongoDB client and server failed to agree on a common Remote Procedure Call (RPC) protocol version during the initial connection handshake. It typically prevents the client from establishing a successful connection to the database, halting further operations.
Error Message
R P C Protocol Negotiation Failed
Known Causes
4 known causesClient-Server Version Mismatch
The MongoDB client and server might be running incompatible versions, leading to a failure in negotiating a common communication protocol.
Network Connectivity Issues
Unstable network connections, packet loss, or routing problems can disrupt the RPC negotiation process between the client and server.
Firewall or Security Blocking
Firewall rules or security group configurations on either the client or server host may be blocking the necessary ports or protocols for RPC negotiation.
Server Overload or Unresponsiveness
A heavily loaded or unresponsive MongoDB server might drop new connection attempts during the protocol negotiation phase, leading to this error.
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