MongoDB Replication Error: 'neither master/slave nor replica set replication detected'

The error message 'neither master/slave nor replica set replication detected' suggests that the MongoDB database you are working with does not have any replication configuration set up.

Replication in MongoDB allows for the automatic synchronization of data across multiple servers, providing redundancy and high availability. It can be set up in two ways: master/slave replication or replica set replication.

Master/slave replication involves one primary server (master) that receives write operations and one or more secondary servers (slaves) that replicate data from the primary server. However, this replication method is being deprecated and replaced by replica set replication.

Replica set replication is the recommended and more flexible way to configure replication in MongoDB. It involves a set of MongoDB instances, where one instance is elected as the primary and the others act as secondary nodes. Data is automatically replicated to all nodes in the replica set, allowing for failover and automatic promotion of a new primary in case the current primary fails.

To resolve the error, you should set up replication in your MongoDB database using the replica set method. Refer to the MongoDB documentation for detailed instructions on how to configure replica sets.