Error: Network error while attempting to run command 'saslStart' on host 'localhost:27017'

Question

When I run mongo I can able to lists the DBs using show dbs command, and perform write and read actions.

But when using the client (Robot 3T) I receive the next error:

Error:
Network error while attempting to run command 'saslStart' on host 'localhost:27017' 

Localhost DB, using macOS Catalina.

Answer 1

I had the same problem today and solved it by upgrading Robo3T from 1.2 to latest 1.3.1.

Answer 2

I believe this is because of version mismatch between mongoclient and mongo. I was able to reproduce this error by using different versions of mongoclient and mongo.

You need to upgrade your mongoclient in every part of your project including python, node and Robo3T etc.