Error
Error Code:
187
MongoDB Error 187: Linearizable Read Concern Failure
Description
This error indicates that MongoDB was unable to fulfill a read operation with 'linearizable' read concern. Linearizable reads guarantee that the data returned reflects all successful write operations acknowledged by a majority of replica set members at the time the read starts. This failure typically occurs when the replica set cannot establish a consistent, up-to-date view across a majority of its members.
Error Message
Linearizable Read Concern Error
Known Causes
3 known causesInsufficient Replica Set Majority
A linearizable read requires a majority of replica set members to be available and reachable to determine the latest committed state. If this majority cannot be formed, the read will fail.
Network Connectivity Issues
Problems such as high latency or network partitions between replica set members can prevent them from communicating effectively to establish the consistent view needed for linearizable reads.
Replica Set State Instability
Frequent primary elections, members falling behind, or other replica set configuration issues can lead to an unstable state where linearizable guarantees cannot be met.
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