MongoDB GoLang Connection Error: How to Fix SASL Authentication Failure?

MongoDB Connection Dialing Error: SASL Authentication Failure

When attempting to establish a MongoDB connection using the provided GoLang code snippet, a panic occurs with the error message "server returned error on SASL authentication step: Authentication failed." Despite ensuring the validity of username, password, host, and database name, the connection fails.

Solution:

A common reason for this issue in MongoDB is the absence of the --authenticationDatabase parameter when connecting to a remote server. This parameter specifies the database that contains the users' credentials.

To resolve this issue, add the --authenticationDatabase parameter to your code as follows:

mongoDialInfo: = & mgo.DialInfo {
 Addrs: [] string {
  dbHost
 },
 Database: dbName,
 Username: userName,
 Password: password,
 **AuthenticationDatabase: "admin",** // Specify the credentials database
 Timeout: 60 * time.Second,
}

With this modification, the connection should succeed as the admin database is the default database where user credentials are stored in MongoDB.

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