SOLVED pm2 do not work after v2.8.0 Update

Klinge

Hello,

I installed a new MM and I got a problem with automatic start with pm2.
I take a freshly installed Raspbian Buster and installed the MM on it. The option of automatic start over pm2 I confirmed with “y”. After the installation, the MM also started automatically.
But when I restart the Pi now, the MM does not start automatically anymore. When I enter “pm2 status”, no application will appear. Of course, I try to start the MM via “pm2 start MagicMirror”. But it also fails. Although pm2 shows the application MagicMirror with the status “online”, but the MM does not start. “pm2 logs MagicMirror” gives the following problem

/home/pi/.pm2/logs/MagicMirror-error.log last 15 lines:
0|MagicMir | { Error: ENOENT: no such file or directory, open 'package.json'
0|MagicMir | at Object.openSync (fs.js:443:3)
0|MagicMir | at Object.readFileSync (fs.js:343:35)
0|MagicMir | at Object.<anonymous> (/home/pi/MagicMirror/js/app.js:15:32)
0|MagicMir | at Module._compile (internal/modules/cjs/loader.js:776:30)
0|MagicMir | at Object.Module._extensions..js (internal/modules/cjs/loader.js:787:10)
0|MagicMir | at Module.load (internal/modules/cjs/loader.js:653:32)
0|MagicMir | at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
0|MagicMir | at Function.Module._load (internal/modules/cjs/loader.js:585:3)
0|MagicMir | at Module.require (internal/modules/cjs/loader.js:690:17)
0|MagicMir | at Module.Hook._require.Module.require (/usr/lib/node_modules/pm2/node_modules/require-in-the-middle/index.js:70:37)
0|MagicMir | errno: -2,
0|MagicMir | syscall: 'open',
0|MagicMir | code: 'ENOENT',
0|MagicMir | path: 'package.json' }

The MM suddenly has a problem with the package.json file.

From the directory … \ MagicMirror I can start the MM manually via “npm start”. But of course I need the automatic start.

It would be really great if anyone could help me.
Thanks in advance

sdetweil

@Klinge cool!.. thanks for the feedback

pm2 startup should have told you to execute another command. right?

on my system

odroid@odroid:~/MagicMirror$ pm2 startup
[PM2] Init System found: systemd
[PM2] **To setup the Startup Script, copy/paste the following command:**
sudo env PATH=$PATH:/usr/bin /usr/local/lib/node_modules/pm2/bin/pm2 startup systemd -u odroid --hp  /home/odroid

lukas1760

This post is deleted!

bhepler

All right, let’s get you fixed up.

If I understand you properly, when you type pm2 status all you get something akin to this:

┌─────────────┬────┬──────┬─────┬────────┬─────────┬────────┬─────┬──────────┬──────┬──────────┐
│ App name    │ id │ mode │ pid │ status │ restart │ uptime │ cpu │ mem      │ user │ watching │
├─────────────┼────┼──────┼─────┼────────┼─────────┼────────┼─────┼──────────┼──────┼──────────┤

└─────────────┴────┴──────┴─────┴────────┴─────────┴────────┴─────┴──────────┴──────┴──────────┘

Assuming that this is the case, it sounds like pm2 needs to start watching your magic mirror process again. Clear out your pm2 logs by typing pm2 flush. You should be able to re-engage pm2 on the MagicMirror script like so: pm2 start /home/pi/MagicMirror/installers/mm.sh. After it loads your mirror, save the state of pm2 by typing pm2 save.

Give that a go and report back please.

Klinge

Thank you for your help.

But unfortunately it doesn´t work.

I cleared the logfiles and started the MM as you described. The MM also started. And so I saved the state. But after I restarted the Pi, the MM did not start automatically anymore.

PM2 status was empty

pi@raspberrypi:~ $ pm2 status
[PM2] Spawning PM2 daemon with pm2_home=/home/pi/.pm2
[PM2] PM2 Successfully daemonized
┌──────┬────┬──────┬────────┬───┬─────┬────────┐
│ Name │ id │ mode │ status │ ↺ │ cpu │ memory │
└──────┴────┴──────┴────────┴───┴─────┴────────┘
 Use `pm2 show <id|name>` to get more details about an app

sdetweil

@Klinge interesting error reported similar behavior

https://github.com/Unitech/pm2/issues/2006

if node or npm versions change, may need to rerun

pm2 startup

command

Klinge

Thank you for your advice.

What exactly did I do?

I installed npm again with

sudo npm install -g pm2

Then I entered

pm2 startup
pm2 start /home/pi/MagicMirror/installers/mm.sh

Der MM startete. And then

sudo pm2 flush
pm2 flush
pm2 save
sudo pm2 save

And when I restart the PI, MM start automatically.

I do not know exactly what helped. But it works.

Thank you again

sdetweil

@Klinge cool!.. thanks for the feedback

pm2 startup should have told you to execute another command. right?

on my system

odroid@odroid:~/MagicMirror$ pm2 startup
[PM2] Init System found: systemd
[PM2] **To setup the Startup Script, copy/paste the following command:**
sudo env PATH=$PATH:/usr/bin /usr/local/lib/node_modules/pm2/bin/pm2 startup systemd -u odroid --hp  /home/odroid

bhepler

@Klinge said in pm2 do not work after v2.8.0 Update:

Then I entered

pm2 startup
pm2 start /MagicMirror/installers/mm.sh

This path is wrong.

Klinge

@sdetweil Yes, you are right

on my sytem it was

sudo env PATH=$PATH:/usr/bin /usr/lib/node_modules/pm2/bin/pm2 startup systemd -u pi --hp /home/pi

@bhepler Yes, you are right too.

My path above was relative, not absolute. But of course, it was wrong. I entered the absolute path. So I have improved it above

Ivanov_d

I do have the same issue and although I managed to make MM start automatically I now have two instances and one restarts every few seconds because of the same error:

0|MagicMirror  | { Error: ENOENT: no such file or directory, open 'package.json'
0|MagicMirror  |     at Object.openSync (fs.js:443:3)
0|MagicMirror  |     at Object.readFileSync (fs.js:343:35)
0|MagicMirror  |     at Object.<anonymous> (/home/pi/MagicMirror/js/app.js:15:32)
0|MagicMirror  |     at Module._compile (internal/modules/cjs/loader.js:776:30)
0|MagicMirror  |     at Object.Module._extensions..js (internal/modules/cjs/loader.js:787:10)
0|MagicMirror  |     at Module.load (internal/modules/cjs/loader.js:653:32)
0|MagicMirror  |     at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
0|MagicMirror  |     at Function.Module._load (internal/modules/cjs/loader.js:585:3)
0|MagicMirror  |     at Module.require (internal/modules/cjs/loader.js:690:17)
0|MagicMirror  |     at Module.Hook._require.Module.require (/usr/lib/node_modules/pm2/node_modules/require-in-the-middle/index.js:70:37)
0|MagicMirror  |   errno: -2,
0|MagicMirror  |   syscall: 'open',
0|MagicMirror  |   code: 'ENOENT',
0|MagicMirror  |   path: 'package.json' }
PM2            | App [MagicMirror:0] exited with code [1] via signal [SIGINT]
PM2            | App [MagicMirror:0] starting in -fork mode-
PM2            | App [MagicMirror:0] online

pi@raspberrypi:~ $ pm2 status all
┌─────────────┬────┬─────────┬──────┬──────┬────────┬─────────┬────────┬─────┬───────────┬──────┬──────────┐
│ App name    │ id │ version │ mode │ pid  │ status │ restart │ uptime │ cpu │ mem       │ user │ watching │
├─────────────┼────┼─────────┼──────┼──────┼────────┼─────────┼────────┼─────┼───────────┼──────┼──────────┤
│ MagicMirror │ 0  │ 2.8.0   │ fork │ 2096 │ online │ 87      │ 1s     │ 0%  │ 30.9 MB   │ pi   │ disabled │
│ mm          │ 1  │ 2.8.0   │ fork │ 914  │ online │ 0       │ 3m     │ 0%  │ 2.5 MB    │ pi   │ disabled │
└─────────────┴────┴─────────┴──────┴──────┴────────┴─────────┴────────┴─────┴───────────┴──────┴──────────┘
 Use `pm2 show <id|name>` to get more details about an app

How do I:
a) fix MagicMirror startup script
or
b) make it stop from auto starting (e.g. stopping it manually via pm2 stop MagicMirror and then saving the state with pm2 save doesn’t work)