Why Does My MongoDB POST Request Return \'No Write Concern Mode Named \'majority\' Found\'?

"No Write Concern Mode Named 'majority' Found in Replica Set Configuration" Error

Problem Statement:

When attempting to insert objects into MongoDB using a POST request, users encounter the error, "No write concern mode named 'majority' found in replica set configuration." Despite successful data insertion, this error persists.

Discussion:

The "write concern" determines the level of acknowledgement required for a write operation to be considered successful. By default, MongoDB uses the "unacknowledged" write concern, which offers no guarantees.

To specify a different write concern, such as "majority," it is necessary to include the w parameter in the connection URI. However, in replica set configurations, the "majority" write concern requires specific replica set settings.

Solution:

To resolve the issue, it is essential to remove the &w=majority segment from the connection URI. With the default "unacknowledged" write concern, write operations will be successful without the need for explicit acknowledgement.

Example:

"mongoURI" : "mongodb+srv://${ db user name }:${ db password }@cluster0.mde0j.mongodb.net/cluster0?retryWrites=true"

Note:

It is crucial to understand that write concerns affect the balance between performance and data durability. While "unacknowledged" offers faster write operations, it may compromise data integrity in the event of unexpected system disruptions.

The above is the detailed content of Why Does My MongoDB POST Request Return \'No Write Concern Mode Named \'majority\' Found\'?. For more information, please follow other related articles on the PHP Chinese website!