I upgraded to M2: Mongoose Server Selection Error: Could not connect to any servers in Atlas

[Malte_Hoch]

Hey,

I just upgraded to M2. On my localhost I can connect to the database.

On my vServer, the connection does not work anymore. It worked before without any flaws.

The error message varies between:

• Mongoose Server Selection Error: Could not connect to any servers in Atlas
• getaddrinfo ENOTFOUND cluster0-shard …

What I already did:

• Specifically opened Port 27107 (I can ping it without issues)
• Whitelisted the correct IP (for testing purposes all IPs)
• Created a new user with new credentials (works on my local machine, but not on the server as well).
• Tried the old version of the Connection String (nodeJS 2.2)

I use the following string:

mongodb+srv://user:pw@cluster0.XX.mongodb.net/correctName?retryWrites=true&w=majority

[MaBeuLux88 (Maxime Beugnet)]

Hi @Malte_Hoch and welcome in the MongoDB Community !

From the same machine you are trying to connect to your M2 from, can you connect using Mongosh?

mongosh "mongodb+srv://free.ne23r.mongodb.net/myFirstDatabase" --apiVersion 1 --username max

Do you happen to have a firewall or some antivirus in place maybe? Maybe a company policy that blocks the port 27017?

Cheers,
Maxime.

[Malte_Hoch]

Hey @MaBeuLux88,

First of all, thank you for your prompt reply. I could solve the issue by removing “?retryWrites=true&w=majority” from the string. Quite weird, since this worked perfectly fine before the upgrade to M2 and I would have never expected this to be the final solution after investigating the docs, this forum and Stackoverflow!

Thank you for your hint anyway.

With best regards

Malte

[MaBeuLux88 (Maxime Beugnet)]

I just used the “CONNECT” button in Atlas and follow the path for the application I want to use. Then I just copy & paste the command line or the connection string that is provided.

Cheers,
Maxime.