Error
Error Code:
114
MongoDB Error 114: Oplog Source Missing
Description
This error occurs during the initial synchronization process when a new or recovering MongoDB replica set member attempts to copy data from a source. It indicates that the chosen sync source cannot provide the necessary operational log (oplog) history, preventing the syncing member from catching up consistently.
Error Message
Initial Sync Oplog Source Missing
Known Causes
4 known causesInsufficient Oplog History
The oplog (operation log) on the chosen source member is too small or has been truncated, lacking the necessary historical operations for the syncing member to catch up.
Unhealthy Sync Source
The replica set member designated as the initial sync source is unhealthy, unavailable, or not in a state suitable for providing a consistent oplog stream.
Network Connectivity Issues
Intermittent or persistent network problems between the syncing member and its chosen source member prevent reliable access to the oplog.
Source Data Inconsistency
The source member's data or its oplog itself might be corrupted or inconsistent, making it an unreliable source for initial synchronization.
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