Pm2: Cannot find module '../constants.js

[orwell1984]

Hi there!

I am running the following stack :
pm2 v3.4.0
noded v11.11.0
npm v6.7.0

Running my application while dockerised dies immediately with Cannot find module '../constants.js'

Funny, strace shows this lookup happening:

stat("/usr/src/app/node_modules/.bin", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
stat("/usr/src/app/node_modules/constants.js", 0x7ffd94d827c0) = -1 ENOENT (No such file or directory)
stat("/usr/src/app/node_modules/constants.js.js", 0x7ffd94d826f0) = -1 ENOENT (No such file or directory)
stat("/usr/src/app/node_modules/constants.js.json", 0x7ffd94d826f0) = -1 ENOENT (No such file or directory)
stat("/usr/src/app/node_modules/constants.js.node", 0x7ffd94d826f0) = -1 ENOENT (No such file or directory)
mprotect(0x183097484000, 503808, PROT_READ|PROT_WRITE) = 0

For whatever reason pm2 is looking for it's files in root node_modules, as far as I can tell.
So I threw it a bone, cp constants.js node_modules/constants.js and now the error is Cannot find module './paths.js'. So there's no end to this it seems.

I have no explanation for why this may happen in this case and work in others, but I think there may be a legit bug here. Sounds like https://github.com/Unitech/pm2/issues/4001 in a way.

[orwell1984]

ping @Unitech

[Unitech]

how did you installed pm2 and node.js?

[arvidboivie]

I'm having the same issue. It works locally on my mac, but gets the above error when deployed to ec2. Installing with yarn.

[orwell1984]

@Unitech node comes with my image, node ;)

pm2 - > npm install pm2 -g, the usual.

[orwell1984]

@arvidboivie hi mate, have you maybe managed to work around this somehow?

[arvidboivie]

@arvidboivie hi mate, have you maybe managed to work around this somehow?

Not really, I went with a systemd solution instead.

[Unitech]

@orwell1984 can you show me your image build or share anythin to make me able to reproduce this issue, else I cannot help..

[orwell1984]

@Unitech You can run docker image phylogenyexplorer/client:0.0.2 if you want to reproduce.
Repo is here - https://github.com/phylogeny-explorer/explorer/

You can run bash in it via docker run -p 3000:3000 -it --entrypoint bash phylogenyexplorer/client:0.0.2

[orwell1984]

Hi @Unitech , any chance you had time to look into this? I can't do anything about my project because of this issue...

[Eywek]

Hi,

You can use directly pm2 start ... instead of npx pm2 start it will work.

root@d6df3b884a84:/usr/src/app# npx pm2 start ecosystem.config.js
Cannot find module '../constants.js'
root@d6df3b884a84:/usr/src/app# pm2 start ecosystem.config.js
[PM2] Applying action restartProcessId on app [admin-front-end](ids: 0)
[PM2] [admin-front-end](0) ✓
┌─────────────────┬────┬─────────┬──────┬─────┬────────┬─────────┬────────┬─────┬───────────┬──────┬──────────┐
│ App name        │ id │ version │ mode │ pid │ status │ restart │ uptime │ cpu │ mem       │ user │ watching │
├─────────────────┼────┼─────────┼──────┼─────┼────────┼─────────┼────────┼─────┼───────────┼──────┼──────────┤
│ admin-front-end │ 0  │ N/A     │ fork │ 104 │ online │ 1       │ 0s     │ 0%  │ 22.8 MB   │ root │ disabled │
└─────────────────┴────┴─────────┴──────┴─────┴────────┴─────────┴────────┴─────┴───────────┴──────┴──────────┘
 Use `pm2 show <id|name>` to get more details about an app

[orwell1984]

@Eywek wow, thanks mate! I did not think to check this way of running.

[Unitech]

thanks @Eywek, closing the issue

[humorHan]

Hi,

You can use directly pm2 start ... instead of npx pm2 start it will work.

root@d6df3b884a84:/usr/src/app# npx pm2 start ecosystem.config.js
Cannot find module '../constants.js'
root@d6df3b884a84:/usr/src/app# pm2 start ecosystem.config.js
[PM2] Applying action restartProcessId on app [admin-front-end](ids: 0)
[PM2] [admin-front-end](0) ✓
┌─────────────────┬────┬─────────┬──────┬─────┬────────┬─────────┬────────┬─────┬───────────┬──────┬──────────┐
│ App name        │ id │ version │ mode │ pid │ status │ restart │ uptime │ cpu │ mem       │ user │ watching │
├─────────────────┼────┼─────────┼──────┼─────┼────────┼─────────┼────────┼─────┼───────────┼──────┼──────────┤
│ admin-front-end │ 0  │ N/A     │ fork │ 104 │ online │ 1       │ 0s     │ 0%  │ 22.8 MB   │ root │ disabled │
└─────────────────┴────┴─────────┴──────┴─────┴────────┴─────────┴────────┴─────┴───────────┴──────┴──────────┘
 Use `pm2 show <id|name>` to get more details about an app

npx pm2 startnot work，why？