Issue
The following error message appears in the Fivetran dashboard: It has been too long since the last incremental update.
Environment
Connector: MongoDB
Resolution
This error message means the source MongoDB Oplog retention period isn’t long enough.
Cause
If we are importing a very large table, especially during historical syncs, the amount of time it takes to import the table may be longer than the retention period for the Oplogs, which are used for incremental updates.
We will need to increase the retention period for the Oplog to make sure they are still available after the table import is complete.