`Cannot find module 'long'` error when trying to run `@tensorflow/tfjs` module in Node.js

[tamaina]

System information

• OS Platform and Distribution (e.g., Linux Ubuntu 16.04): Linux Ubuntu 20.04.4 LTS (Focal Fossa)
• TensorFlow.js installed from (npm or script link): npm (using on yarn berry 3.2.1)
• TensorFlow.js version: 3.20.0

Describe the problem
I got Cannot find module 'long' error when trying to run @tensorflow/tfjs module in Node.js.

node:internal/modules/cjs/loader:956
  const err = new Error(message);
              ^

Error: Cannot find module 'long'
Require stack:
- /home/ubuntu/misskey-dev/node_modules/.store/@tensorflow-tfjs-npm-3.20.0-3984b7fecc/node_modules/@tensorflow/tfjs/dist/tf.node.js
- /home/ubuntu/misskey-dev/node_modules/.store/nsfwjs-virtual-fe284db5a1/node_modules/nsfwjs/dist/index.js
    at Module._resolveFilename (node:internal/modules/cjs/loader:956:15)
    at Module._load (node:internal/modules/cjs/loader:804:27)
    at Module.require (node:internal/modules/cjs/loader:1022:19)
    at require (node:internal/modules/cjs/helpers:102:18)
    at Object.<anonymous> (/home/ubuntu/misskey-dev/node_modules/.store/@tensorflow-tfjs-npm-3.20.0-3984b7fecc/node_modules/@tensorflow/tfjs/dist/tf.node.js:24:19)
    at Module._compile (node:internal/modules/cjs/loader:1120:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1174:10)
    at Module.load (node:internal/modules/cjs/loader:998:32)
    at Module._load (node:internal/modules/cjs/loader:839:12)
    at Module.require (node:internal/modules/cjs/loader:1022:19) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [
    '/home/ubuntu/misskey-dev/node_modules/.store/@tensorflow-tfjs-npm-3.20.0-3984b7fecc/node_modules/@tensorflow/tfjs/dist/tf.node.js',
    '/home/ubuntu/misskey-dev/node_modules/.store/nsfwjs-virtual-fe284db5a1/node_modules/nsfwjs/dist/index.js'
  ]
}

Node.js v18.7.0

I think this is a behavior specific to Yarn berry (I am using v3.2.1).

I think one of the reasons is that its package.json does not contain long dependency.

tfjs/tfjs/package.json

Line 77 in 52d30d6

"dependencies": {

I got it to work by adding long to the dependency in my yarn.lock.

Why doesn't @tensorflow/tfjs include long as a dependency?

[rthadur]

Thank you, we do not support yarnberry with tfjs .
cc @pyu10055

[mattsoulanille]

Thanks for the bug report @tamaina.

@tensorflow/tfjs depends on @tensorflow/tfjs-core, which depends on long. However, it looks like the @tensorflow/tfjs/dist/tf.node.js bundle is trying to require('long'); even while it imports @tensorflow/tfjs-core. @tensorflow/tfjs has no reference to long in its src/ directory, so this doesn't seem right.

This works fine in yarn 1.x.x, but maybe yarn berry has stricter (and more correct) dependency resolution. I'll look into why the node bundle has the line var LongExports = require('long');

[gaikwadrahul8]

Hi, @tamaina

Apologize for the delayed response and It seems like this issue has been taken care after merging this PR #8764 and now we are able to include long as a dependency in @tensorflow/tfjs by using npm i long command and I tried it's working as expected, for your reference I have added package.json file details below and if have I missed something here please let me know or Could you please confirm if this issue is resolved for you ? Please feel free to close the issue if it is resolved ? Thank you!

{
  "dependencies": {
    "@tensorflow/tfjs": "^4.1.0",
    "@tensorflow/tfjs-backend-webgl": "^4.2.0",
    "@tensorflow/tfjs-core": "^4.2.0",
    "@tensorflow/tfjs-node": "^4.2.0",
    "long": "^5.2.1",
    "node-dns": "^0.1.0",
    "node-fetch": "^3.3.1"
  },
  "type": "module"
}

[tamaina]

With yarn, the issue of missing dependencies could be solved by editing .yarnrc.yml.

However, our project is now using pnpm. We have no problem.

Thanks for your reply.

[google-ml-butler]

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