Node.bcrypt.js: Error: invalid ELF header

[program-om]

I am trying to deploy my REST API to heroku. Although, the application is working on my computer, it is not working on heroku. In the application log, i got this

Process exited with status 1
2019-09-23T01:09:55.744676+00:00 heroku[web.1]: Starting process with command `node server.js`
2019-09-23T01:09:58.446510+00:00 heroku[web.1]: Process exited with status 1
2019-09-23T01:09:58.468276+00:00 heroku[web.1]: State changed from starting to crashed
2019-09-23T01:09:58.370869+00:00 app[web.1]: internal/modules/cjs/loader.js:807
2019-09-23T01:09:58.370888+00:00 app[web.1]: return process.dlopen(module, path.toNamespacedPath(filename));
2019-09-23T01:09:58.370890+00:00 app[web.1]: ^
2019-09-23T01:09:58.370892+00:00 app[web.1]: 
2019-09-23T01:09:58.370894+00:00 app[web.1]: Error: /app/node_modules/bcrypt/lib/binding/bcrypt_lib.node: invalid ELF header
2019-09-23T01:09:58.370896+00:00 app[web.1]: at Object.Module._extensions..node (internal/modules/cjs/loader.js:807:18)
2019-09-23T01:09:58.370898+00:00 app[web.1]: at Module.load (internal/modules/cjs/loader.js:653:32)
2019-09-23T01:09:58.370900+00:00 app[web.1]: at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
2019-09-23T01:09:58.370902+00:00 app[web.1]: at Function.Module._load (internal/modules/cjs/loader.js:585:3)
2019-09-23T01:09:58.370904+00:00 app[web.1]: at Module.require (internal/modules/cjs/loader.js:692:17)
2019-09-23T01:09:58.370906+00:00 app[web.1]: at require (internal/modules/cjs/helpers.js:25:18)
2019-09-23T01:09:58.370909+00:00 app[web.1]: at Object.<anonymous> (/app/node_modules/bcrypt/bcrypt.js:6:16)
2019-09-23T01:09:58.370910+00:00 app[web.1]: at Module._compile (internal/modules/cjs/loader.js:778:30)
2019-09-23T01:09:58.370912+00:00 app[web.1]: at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
2019-09-23T01:09:58.370915+00:00 app[web.1]: at Module.load (internal/modules/cjs/loader.js:653:32)
2019-09-23T01:09:58.370917+00:00 app[web.1]: at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
2019-09-23T01:09:58.370919+00:00 app[web.1]: at Function.Module._load (internal/modules/cjs/loader.js:585:3)
2019-09-23T01:09:58.370921+00:00 app[web.1]: at Module.require (internal/modules/cjs/loader.js:692:17)
2019-09-23T01:09:58.370923+00:00 app[web.1]: at require (internal/modules/cjs/helpers.js:25:18)
2019-09-23T01:09:58.370924+00:00 app[web.1]: at Object.<anonymous> (/app/routes/auth.js:6:16)
2019-09-23T01:09:58.370926+00:00 app[web.1]: at Module._compile (internal/modules/cjs/loader.js:778:30)

This seems to have something to do with bcrypt module. I tried the solutions suggested here: https://github.com/kelektiv/node.bcrypt.js/issues/595 and https://github.com/kelektiv/node.bcrypt.js/issues/635

such as: npm rebuild bcrypt --build-from-source

here is package.json file:

{
  "name": "server",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "bcrypt": "^3.0.6",
    "body-parser": "^1.18.3",
    "cors": "^2.8.4",
    "cron": "^1.7.2",
    "express": "^4.16.3",
    "jsonwebtoken": "^8.3.0",
    "jwt-simple": "^0.5.6",
    "mapnik": "^4.3.1",
    "mkdirp": "^0.5.1",
    "mongoose": "^5.7.1",
    "multer": "^1.4.1",
    "nodemailer": "^6.3.0",
    "request": "^2.88.0",
    "ug": "0.0.8"
  }
}

I have node v10.16.3 and I am running MacOS v10.14.6

None of those solutions worked for me! Is the problem has to do with bcrypt or heroku?
How can I solve this problem?

[program-om]

When I commented all the lines of code that has something to do with bcrypt then deployed it again, it worked. This means the problem is definitely has something to do with bcrypt.

[recrsn]

You are pushing compiled bcrypt binaries to heroku (which is linux). Trying to load macOS binaries in Linux will give that error. Setup your gitignore properly to exclude node_modules

[program-om]

@agathver Setup your gitignore properly to exclude node_modules ignoring node_modules in gitignore would not have any effects on other dependencies?
If not, how eactly can I set up my "gitignore properly to exclude node_modules"?

[recrsn]

Node modules will automatically be created upon npm install. This is done
automatically by heroku.

To setup your gitignore, create a file called '.gitignore' and add
'node_modules' to it. Delete the directory as well if you are checking them
into your repository

On Tue, 24 Sep, 2019, 5:00 am Abdulaziz, [e-mail] wrote:

@agathver https://github.com/agathver Setup your gitignore properly to
exclude node_modules ignoring node_modules in gitignore would not have
any effects on other dependencies?
If not, how eactly can I set up my "gitignore properly to exclude
node_modules"?

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[cooervo]

For those using bcrypt with docker container:

Create .dockerignore file and add inside .dockerignore the following line:

node_modules

[pacyL2K19]

I just removed node_module directory from github then pushed modifications on heroku. That fixed my problem. Thanks to @agathver

[carlosyenh]

There is a simple way that allowed me to solve this problem:

1. Uninstall bcrypt
npm uninstall bcrypt

2.- Install bcrypt again
npm i bcrypt

The error occurs because when you install bcypt, npm installs the recommended version for your machine and operating system, but when you are on another machine, this doesn't work

[ZohaibD]

There is a simple way that allowed me to solve this problem:

1. Uninstall bcrypt
npm uninstall bcrypt

2.- Install bcrypt again
npm i bcrypt

The error occurs because when you install bcypt, npm installs the recommended version for your machine and operating system, but when you are on another machine, this doesn't work

I am still facing the issue with docker. could you please help me out. As i have already .dockerignore file and tried your method but does't work for me. thanks

[carlosyenh]

I think you can solve the problem by simply removing the bcrypt dependency from your package.jsonfile (this file is in the root folder of your node project and you just need to delete the line "bcrypt": "version",), this prevents the npm install command from installing the bcryptlibrary, so you just need to add the instruction to install bcrypt, adding the following line just after running npm install

RUN npm i bcrypt

Ensure you are in the correct folder

[dpkshrma]

Alternatively, you can use bcryptjs 🤷