MetaCall FaaS Fails to Start After Deployment Attempt (ENOENT: spawn metacall Error)

[RohanKrMahato]

Description

After successfully running MetaCall FaaS, I attempted to deploy using npx metacall-deploy --dev. The deployment process failed with an undefined server error. Since then, FaaS is no longer working. Restarting the service now results in an ENOENT: spawn metacall error.

Note: (Temporary fix) Remove the Cache folder of Faas

• on windows you can find Cache here: C:\Users\<your PC's user name>\AppData\Roaming\metacall
• on Ubuntu you can find it here: go to Home directory, show hidden folder, and you will get a folder .metacall

Which OS I tried?

• I tried on Ubuntu and Windows 11
• however, I will be providing details below with respect to ubuntu. Since it is almost same on both Ubuntu and Windows 11

Proof, that Faas was working initially

rohan@rohan-virtual-machine:~/Desktop/faas$ npm start

> @metacall/[email protected] start
> npm run build && node dist/index.js


> @metacall/[email protected] build
> npm run lint && tsc


> @metacall/[email protected] lint
> eslint . --max-warnings=0 --ignore-pattern dist

Server is running on the port 9000

What I did?

• On ubuntu build and installed Metacall Core
• Cloned the FAAS repository, then did npm install && npm start ( and it ran on Port 9000 )
• Now I made a folder named basicfaastest and inside it i created two files namely sum.py and main.js

const {sum} = require('./sum.py');

function getsum(a,b){
console.log(sum(a,b));
let temp=sum(a,b);
return temp;
}

module.exports=getsum;

def sum(a,b):
	return a+b

• Note: I checked these files using metacallcli it is loading properly and these two code don't have any issue.
• Now, I moved to basicfaastest folder
• and, installed the deploy tool, npm i @metacall/deploy
• then executed npx metacall-deploy --dev
• deploy asked me metacall.json is not present would you like to create it, and then I choose Yes
• after few steps
• it asked me if I like to add env variable? I choose Yes
• then something like this appeared Type env vars in the format: K1=V1, K2=V2 ( I think this is the critical point, here I didn't provided any variable and simply pressed enter)
• and then it started to deploy

i Deploying /home/rohan/Desktop/basicfaastest...

X Server responded with error code:  undefined

• along with the error the Faas running in another terminal at port 9000 terminated with the following

node:events:485
      throw er; // Unhandled 'error' event
      ^

Error: spawn metacall ENOENT
    at ChildProcess._handle.onexit (node:internal/child_process:286:19)
    at onErrorNT (node:internal/child_process:484:16)
    at process.processTicksAndRejections (node:internal/process/task_queues:90:21)
Emitted 'error' event on ChildProcess instance at:
    at ChildProcess._handle.onexit (node:internal/child_process:292:12)
    at onErrorNT (node:internal/child_process:484:16)
    at process.processTicksAndRejections (node:internal/process/task_queues:90:21) {
  errno: -2,
  code: 'ENOENT',
  syscall: 'spawn metacall',
  path: 'metacall',
  spawnargs: [ '/home/rohan/Desktop/faas/dist/worker/index.js' ]
}

Node.js v23.7.0

• and now, When ever I write npm start in the faas cloned folder it don't run and give the following error

• I tried to reinstalled metacall, but that didn't helped, the error is still there.

what configurations i choosed in the deploy? ( for your reference)

rohan@rohan-virtual-machine:~/Desktop/basicfaastest$ npx metacall-deploy --dev
! No metacall.json was found in /home/rohan/Desktop/basicfaastest, launching the wizard...
? Do you want to save metacall.json file? (Y/N): Y
? Select languages to run on MetaCall NodeJS, Python
? Select files to load with NodeJS main.js
? Select files to load with Python sum.py
? Do you want to add environment variables? Yes
? Type env vars in the format: K1=V1, K2=V2 
i Deploying /home/rohan/Desktop/basicfaastest...

X Server responded with error code:  undefined