In this small post, let’s see how to resolve getaddrinfo EAI_AGAIN error when you try to connect to a database in mongo using Mongoose or other mongo libraries.

This error probably occurs because your Mongo DB connection URI is wrong.

“mongodb://appuser:app@123!@localhost:27017/appdb”

Let’s consider the above Mongo connection URI that you use to connect to your Mongo Database.

If you get getaddrinfo EAI_AGAIN error when you connect to your database, please check the following.

• If username and password are correct
• The Mongo URL is in the correct format. i.e. mongodb://username:password@host:port/db
• The host is accessible and your network connectivity is good.
• You have the specified database in mongo.