Server at (localhost:27017) reports wire version (4), but this version of the Ruby driver requires at least (6)

Question

Server at (localhost:27017) reports wire version (4), but this version of the Ruby driver requires at least (6).

i am using ubuntu 16.04 and ruby -v 3.0.2 rails 6.1.4.1

it not insert and fetch data from data base

Answer 1

I faced the same issue. This error is raised by Mongo-Ruby-Driver from line 71.

The error states that Mongo-Ruby-Driver is not compatible with the MongoDB you are running. I was running MongoDB with version 3.2, and updated it to 5.0.5, which works like a charm.

Here are the steps I took:

ps ax | grep mongo

Change processID with your Mongo process id:

kill -9 processID

Install latest Mongodb and unlink the old version:

brew install mongodb-community
brew unlink [email protected]

Update LaunchAgent:

launchctl unload -w ~/Library/LaunchAgents/homebrew.mxcl.mongodb-community.plist
launchctl load -w ~/Library/LaunchAgents/homebrew.mxcl.mongodb-community.plist

Update .zshrc if required:

echo 'export PATH="/usr/local/opt/mongodb-community/bin:$PATH"' >> ~/.zshrc

Link & start MongoDB:

brew link mongodb-community
brew services restart mongodb-community

Start MongoDB:

mongod --dbpath ~/data/db
# Make sure you have access rights to ~/data/db directory.

If you get this error:

Failed to unlink socket file","attr":{"path":"/tmp/mongodb-27017.sock","error":"Permission denied"}}

You can fix it by removing this file:

sudo rm -rf /tmp/mongodb-27017.sock