Error: couldn’t connect to server shell/mongo.js:84 – SOLVED

Error Couldn T Connect To Server 127 0 0 1 Shell Mongo Js 84

I was having an issue on Mac OS X – this is probably because I installed it with homebrew a few months back and forgot about these instructions.


MongoDB shell version: 2.0.6
connecting to: test
Sat Jun 16 09:11:43 
exception: connect failed

Error: couldn't connect to server shell/mongo.js:84

I search for a solution but didn’t easily find one, so I ended up uninstalling it and reinstalling it, which then gave me the very valuable notes below about where config files and data paths are stored on OSX, and also let me know that I needed to start the service if I wanted to use it.

Here are those notes:


Already downloaded: /Users/me/Library/Caches/Homebrew/mongodb-2.0.6-x86_64.tgz


If this is your first install, automatically load on login with:

mkdir -p ~/Library/LaunchAgents  
cp /usr/local/Cellar/mongodb/2.0.6-x86_64/homebrew.mxcl.mongodb.plist ~/Library/LaunchAgents/  
launchctl load -w ~/Library/LaunchAgents/homebrew.mxcl.mongodb.plist  

If this is an upgrade and you already have the homebrew.mxcl.mongodb.plist loaded:

launchctl unload -w ~/Library/LaunchAgents/homebrew.mxcl.mongodb.plist  
cp /usr/local/Cellar/mongodb/2.0.6-x86_64/homebrew.mxcl.mongodb.plist ~/Library/LaunchAgents/  
launchctl load -w ~/Library/LaunchAgents/homebrew.mxcl.mongodb.plist  

Or start it manually:

mongod run --config /usr/local/etc/mongod.conf  

The launchctl plist above expects the config file to be at /usr/local/etc/mongod.conf


/usr/local/Cellar/mongodb/2.0.6-x86_64: 18 files, 122M, built in 2 seconds

You might want to run brew update and brew upgrade to update / upgrade all of your homebrew packages, or brew update and brew upgrade mongodb to update mongodb to the latest version.

A few other notes if you’re using homebrew:

# updates the database of available software and what the latest
# available version for each is. run this before running other brew commands.

  brew update

# upgrades all homebrew packages on the system. can also be used to
# just upgrade a specific package by specifying the package name

  brew upgrade

# removes the specified package from your system

  brew remove

# installs a specified package from your system

  brew install

More notes about the brew command can be found at

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