Cannot find module '../build/Release/bson'] code: 'MODULE_NOT_FOUND' } js-bson: Failed to load c++ bson extension, using pure JS version

Question

I am getting the below error:

{ [Error: Cannot find module \'../build/Release/bson\'] code: \'MODULE_NOT_FOUND\' } 
  js-bson: Failed to load c++ bson extens         


        

Answer 1

I had this issue today (Feb 19th, 2016) and I solved it just by installing the latest version of Mongoose. Try putting this in your package.json:

"mongoose": "~4.4"

Hope that helps. Solved it for me!

Answer 2

While creating setup for www.spotdekho.com in new windows10 machine, I was unable to run command "nodemon web.js" due same error

"Error: Cannot find module '../build/Release/bson'"

Got it fixed by below steps :

1. Create folder "Release" inside "node_modules\bson\build\" location
2. Copy bson.js from "node_modules\bson\browser_build\"
3. Paste bson.js inside "node_modules\bson\build\Release" folder.

This will resolve the issue.

PS : I am using mongoose version 4.8.8 .

Thanks :) , hope it helps someone .

Answer 3

find in npm module mongodb ..node_modules\mongodb\node_modules\bson\ext\index.js

and change path to js version in catch block

bson = require('../build/Release/bson');

to bson = require('../browser_build/bson');

try {
        // Load the precompiled win32 binary
        if(process.platform == "win32" && process.arch == "x64") {
          bson = require('./win32/x64/bson');  
        } else if(process.platform == "win32" && process.arch == "ia32") {
          bson = require('./win32/ia32/bson');  
        } else {
         bson = require('../browser_build/bson');  
        }   
    } catch(err) {
        // Attempt to load the release bson version
        try {
            bson = require('../browser_build/bson');
        } catch (err) {
            console.dir(err)
            console.error("js-bson: Failed to load c++ bson extension, using pure JS version");
            bson = require('../lib/bson/bson');
        }
    }

Answer 4

Short answer

Install the latest version of mongodb.

A little longer answer

Make sure your package.json is using the latest version of mongodb, then remove node_modules/mongodb and do npm install again. If you didn't use mongodb as a direct dependency, try to find which package is using mongdb. I used:

find . -type f -name package.json | xargs grep mongodb
...
./sails-mongo/package.json:    "mongodb": "1.4.26",
...

So I updated ./sails-mongo/package.json to:

"mongodb": "2.1.7",

Then remove node_modules/mongodb and do npm install again. Seems fine now.

Even longer answer

I don't like the current suggested way of using

require('../browser_build/bson')

Since looking at ../browser_build/bson.js, a 4k+ lines file, which seem also a "non-native" implementation. So although it won't spit out any complains, it is still "using pure JS version", which means slower performance.

Looking at https://github.com/mongodb/js-bson/issues/145 and https://github.com/mongodb/js-bson/issues/165, it seems like the issue was caused by:

antoniofruci commented on Sep 15, 2015

I just found out that c++ code has been moved out 6 months ago and it is now an optional dependency: bson-ext. Indeed, if you install latest version no error occurs.

So I tried to remove the whole node_modules and still got the same error. And looking at package.json of node_modules/mongodb, its version is still 1.4.26, not latest 2.1.7.

Apparently my mongodb comes as a dependency of another package I installed: sails-mongo. Modifying the package.json of sails-mongo and redoing npm install finally solve the issue.

Answer 5

Deploying Keystone JS CMS I had same error and I think most elegant solution is this:

Install npm-check-updates:

root@keystonejs:~# npm install -g npm-check-updates

Within your keystone site directory, where package.json is placed, check dependencies:

debian@keystonejs:~/myproject/manalcjim$ npm-check-updates -u

Then update all packages:

debian@keystonejs:~/myproject/manalcjim$ npm install

And finally if you chose jade for templates, maybe you will need install jade module explicitly:

debian@keystonejs:~/myproject/manalcjim$ npm install jade --save

Answer 6

Try this npm install bson and npm update