Unitech / Unitech/pm2

"pm2 scale example-app + 3" spawns indefinitely

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Description

What's going wrong?

I accidently typed pm2 scale example-app + 3 instead of pm2 scale example-app +3.

How could we reproduce this issue?

Add an app and use pm2 scale APP_NAME + 3. Watch it spawn new instances forever.
Ideally this should throw an error.

Supporting information

--- PM2 report ----------------------------------------------------------------
Date                 : Tue Mar 29 2022 11:56:39 GMT+1030 (Australian Central Daylight Time)
===============================================================================
--- Daemon -------------------------------------------------
pm2d version         : 5.1.2
node version         : 14.18.3
node path            : not found
argv                 : C:\Program Files\nodejs\node.exe,C:\Users\xo\AppData\Roaming\nvm\v14.18.3\node_modules\pm2\lib\Daemon.js
argv0                : node
user                 : undefined
uid                  : N/A
gid                  : N/A
uptime               : 9min
===============================================================================
--- CLI ----------------------------------------------------
local pm2            : 5.1.2
node version         : 14.18.3
node path            : not found
argv                 : C:\Program Files\nodejs\node.exe,C:\Program Files\nodejs\node_modules\pm2\bin\pm2,report
argv0                : C:\Program Files\nodejs\node.exe
user                 : xo
===============================================================================
--- System info --------------------------------------------
arch                 : x64
platform             : win32
type                 : Windows_NT
cpus                 : Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz
cpus nb              : 12
freemem              : 5480345600
totalmem             : 17095528448
home                 : C:\Users\xo
===============================================================================
--- PM2 list -----------------------------------------------
┌─────┬────────────────┬─────────────┬─────────┬─────────┬──────────┬────────┬──────┬───────────┬──────────┬──────────┬──────────┬──────────┐
│ id  │ name           │ namespace   │ version │ mode    │ pid      │ uptime │ ↺    │ status    │ cpu      │ mem      │ user     │ watching │
├─────┼────────────────┼─────────────┼─────────┼─────────┼──────────┼────────┼──────┼───────────┼──────────┼──────────┼──────────┼──────────┤
│ 0   │ example-app    │ default     │ 0.0.79  │ fork    │ 28508    │ 5m     │ 0    │ online    │ 0%       │ 26.8mb   │ xo       │ disabled │
│ 1   │ example-app    │ default     │ 0.0.79  │ fork    │ 20976    │ 4m     │ 0    │ online    │ 0%       │ 27.0mb   │ xo       │ disabled │
│ 2   │ example-app    │ default     │ 0.0.79  │ fork    │ 22980    │ 4m     │ 0    │ online    │ 0%       │ 27.5mb   │ xo       │ disabled │
│ 3   │ example-app    │ default     │ 0.0.79  │ fork    │ 31432    │ 4m     │ 0    │ online    │ 0%       │ 27.2mb   │ xo       │ disabled │
│ 4   │ example-app    │ default     │ 0.0.79  │ fork    │ 35040    │ 4m     │ 0    │ online    │ 0%       │ 27.2mb   │ xo       │ disabled │
│ 5   │ example-app    │ default     │ 0.0.79  │ fork    │ 40088    │ 4m     │ 0    │ online    │ 0%       │ 27.0mb   │ xo       │ disabled │
│ 6   │ example-app    │ default     │ 0.0.79  │ fork    │ 33348    │ 4m     │ 0    │ online    │ 0%       │ 27.0mb   │ xo       │ disabled │
│ 7   │ example-app    │ default     │ 0.0.79  │ fork    │ 38068    │ 4m     │ 0    │ online    │ 0%       │ 27.2mb   │ xo       │ disabled │
│ 8   │ example-app    │ default     │ 0.0.79  │ fork    │ 11160    │ 4m     │ 0    │ online    │ 0%       │ 26.9mb   │ xo       │ disabled │
│ 9   │ example-app    │ default     │ 0.0.79  │ fork    │ 11172    │ 4m     │ 0    │ online    │ 0%       │ 26.9mb   │ xo       │ disabled │
│ 10  │ example-app    │ default     │ 0.0.79  │ fork    │ 10532    │ 4m     │ 0    │ online    │ 0%       │ 27.3mb   │ xo       │ disabled │
│ 11  │ example-app    │ default     │ 0.0.79  │ fork    │ 39752    │ 4m     │ 0    │ online    │ 0%       │ 27.3mb   │ xo       │ disabled │
│ 12  │ example-app    │ default     │ 0.0.79  │ fork    │ 28024    │ 4m     │ 0    │ online    │ 0.1%     │ 26.8mb   │ xo       │ disabled │
│ 13  │ example-app    │ default     │ 0.0.79  │ fork    │ 27560    │ 4m     │ 0    │ online    │ 0%       │ 26.8mb   │ xo       │ disabled │
│ 14  │ example-app    │ default     │ 0.0.79  │ fork    │ 40624    │ 4m     │ 0    │ online    │ 0.1%     │ 27.4mb   │ xo       │ disabled │
│ 15  │ example-app    │ default     │ 0.0.79  │ fork    │ 31684    │ 4m     │ 0    │ online    │ 0%       │ 27.1mb   │ xo       │ disabled │
│ 16  │ example-app    │ default     │ 0.0.79  │ fork    │ 16908    │ 4m     │ 0    │ online    │ 0%       │ 26.8mb   │ xo       │ disabled │
│ 17  │ example-app    │ default     │ 0.0.79  │ fork    │ 8576     │ 4m     │ 0    │ online    │ 0.1%     │ 27.3mb   │ xo       │ disabled │
│ 18  │ example-app    │ default     │ 0.0.79  │ fork    │ 14192    │ 4m     │ 0    │ online    │ 0%       │ 27.1mb   │ xo       │ disabled │
│ 19  │ example-app    │ default     │ 0.0.79  │ fork    │ 23120    │ 4m     │ 0    │ online    │ 0%       │ 27.2mb   │ xo       │ disabled │
│ 20  │ example-app    │ default     │ 0.0.79  │ fork    │ 30952    │ 4m     │ 0    │ online    │ 0%       │ 27.2mb   │ xo       │ disabled │
│ 21  │ example-app    │ default     │ 0.0.79  │ fork    │ 3084     │ 4m     │ 0    │ online    │ 0.1%     │ 27.3mb   │ xo       │ disabled │
│ 22  │ example-app    │ default     │ 0.0.79  │ fork    │ 34632    │ 4m     │ 0    │ online    │ 0%       │ 27.3mb   │ xo       │ disabled │
│ 23  │ example-app    │ default     │ 0.0.79  │ fork    │ 18800    │ 4m     │ 0    │ online    │ 0%       │ 27.3mb   │ xo       │ disabled │
│ 24  │ example-app    │ default     │ 0.0.79  │ fork    │ 16340    │ 4m     │ 0    │ online    │ 0%       │ 27.5mb   │ xo       │ disabled │
│ 25  │ example-app    │ default     │ 0.0.79  │ fork    │ 9664     │ 4m     │ 0    │ online    │ 0%       │ 27.1mb   │ xo       │ disabled │
│ 26  │ example-app    │ default     │ 0.0.79  │ fork    │ 16552    │ 4m     │ 0    │ online    │ 0%       │ 27.1mb   │ xo       │ disabled │
│ 27  │ example-app    │ default     │ 0.0.79  │ fork    │ 40896    │ 4m     │ 0    │ online    │ 0%       │ 27.3mb   │ xo       │ disabled │
│ 28  │ example-app    │ default     │ 0.0.79  │ fork    │ 29252    │ 4m     │ 0    │ online    │ 0%       │ 27.0mb   │ xo       │ disabled │
│ 29  │ example-app    │ default     │ 0.0.79  │ fork    │ 9600     │ 4m     │ 0    │ online    │ 0%       │ 27.8mb   │ xo       │ disabled │
└─────┴────────────────┴─────────────┴─────────┴─────────┴──────────┴────────┴──────┴───────────┴──────────┴──────────┴──────────┴──────────┘
===============================================================================
--- Daemon logs --------------------------------------------
C:\Users\xo\.pm2\pm2.log last 20 lines:
PM2        | 2022-03-29T11:52:16: PM2 log: App [example-app:20] starting in -fork mode-
PM2        | 2022-03-29T11:52:16: PM2 log: App [example-app:20] online
PM2        | 2022-03-29T11:52:16: PM2 log: App [example-app:21] starting in -fork mode-
PM2        | 2022-03-29T11:52:16: PM2 log: App [example-app:21] online
PM2        | 2022-03-29T11:52:16: PM2 log: App [example-app:22] starting in -fork mode-
PM2        | 2022-03-29T11:52:16: PM2 log: App [example-app:22] online
PM2        | 2022-03-29T11:52:16: PM2 log: App [example-app:23] starting in -fork mode-
PM2        | 2022-03-29T11:52:16: PM2 log: App [example-app:23] online
PM2        | 2022-03-29T11:52:16: PM2 log: App [example-app:24] starting in -fork mode-
PM2        | 2022-03-29T11:52:16: PM2 log: App [example-app:24] online
PM2        | 2022-03-29T11:52:16: PM2 log: App [example-app:25] starting in -fork mode-
PM2        | 2022-03-29T11:52:16: PM2 log: App [example-app:25] online
PM2        | 2022-03-29T11:52:16: PM2 log: App [example-app:26] starting in -fork mode-
PM2        | 2022-03-29T11:52:16: PM2 log: App [example-app:26] online
PM2        | 2022-03-29T11:52:16: PM2 log: App [example-app:27] starting in -fork mode-
PM2        | 2022-03-29T11:52:16: PM2 log: App [example-app:27] online
PM2        | 2022-03-29T11:52:16: PM2 log: App [example-app:28] starting in -fork mode-
PM2        | 2022-03-29T11:52:16: PM2 log: App [example-app:28] online
PM2        | 2022-03-29T11:52:16: PM2 log: App [example-app:29] starting in -fork mode-
PM2        | 2022-03-29T11:52:16: PM2 log: App [example-app:29] online

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Reproduce the issue with an app and pm2 scale APP_NAME + 3, then trace the CLI's scale argument parsing and compare it with pm2 scale APP_NAME +3. Done means the spaced form reports an error instead of spawning instances indefinitely.

Written by the indexing model from the issue text.

Assessment

Tech stack
javascript, nodejs
Domain
cli
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
42/100

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