Nodemon: Starting inspector on 0.0.0.0:9229 failed: address already in use

[xDelph]

• nodemon -v: 1.18.8
• node -v: 9.4.0
• Operating system/terminal environment: ubuntu 18.04
• Using Docker? What image: docker -> FROM node:slim
• Command you ran: ./node_modules/.bin/nodemon --inspect=0.0.0.0 --legacy-watch ./src ./src/index.js

Expected behaviour

inspector restart on file change

Actual behaviour

Starting inspector on 0.0.0.0:9229 failed: address already in use

Steps to reproduce

using a dockerfile like :

FROM node:slim

# Create app directory
WORKDIR /usr/app

# Install app dependencies
COPY package.json /usr/app/
RUN npm install

# Bundle app source
COPY . /usr/app

CMD [ "npm", "run", "watch" ]

[remy]

Is the watch scripts entry the same as ./node_modules/.bin/nodemon --inspect=0.0.0.0 --legacy-watch ./src ./src/index.js?

And can you replicate with this script:

require('http').createServer((req, res) => res.end('ok')).listen(8000);

[xDelph]

Is the watch scripts entry the same as ./node_modules/.bin/nodemon --inspect=0.0.0.0 --legacy-watch ./src ./src/index.js?

And can you replicate with this script:

require('http').createServer((req, res) => res.end('ok')).listen(8000);

yes, this is the watch entry
and yes i replicate the problem with index.js containing only this line of code

[xDelph]

here is my package.json if needed

{
  "name": "",
  "version": "1.4.1",
  "main": "index.js",
  "scripts": {
    "start": "node ./src/index.js",
    "watch": "./node_modules/.bin/nodemon --inspect --watch ./src ./src/index.js",
    "test": "echo 'no test implemented !!'"
  },
  "license": "MIT",
  "dependencies": {
    "axios": "^0.18.0",
    "body-parser": "^1.18.3",
    "dotenv": "^6.0.0",
    "express": "^4.16.3",
    "foreman": "^3.0.1",
    "jsonwebtoken": "^8.3.0",
    "mongodb": "^2.2.14",
    "mssql": "^4.1.0",
    "nodemon": "^1.18.8"
  }
}

docker-compose : 1.22.0
docker : 18.09.0

[remy]

Can you provide a full working Dockerfile and docker-compose.yml file? I know _very little_ about docker, so it's hard for me to replicate fully to debug. (and possibly how to start the container…)

[xDelph]

you will find a project setup to reproduce the issue here : https://github.com/xDelph/nodemon-issue-inspector

just launch docker-compose up at the root

[remy]

Sorry - I've _just_ solved the issue (with a lot of messing on the command line).

If you do a hard upgrade of nodemon, it should include the latest pstree.[email protected] (a quick check with npm ls pstree.remy should validate). If you have that sub-dep, then you'll find it properly kills the inspector.

[xDelph]

Step 6/9 : RUN npm ls pstree.remy
 ---> Running in 97c4d86b2c37
 /usr/app
`-- [email protected]
  `-- [email protected] 

the version of pstree.remy seems ok now in my docker
but now i get :

/usr/app/node_modules/pstree.remy/lib/index.js:25
webapi_1  |     .catch(error => callback(error));
webapi_1  |                                    ^
webapi_1  | 
webapi_1  | SyntaxError: missing ) after argument list
webapi_1  |     at new Script (vm.js:83:7)
webapi_1  |     at createScript (vm.js:267:10)
webapi_1  |     at Object.runInThisContext (vm.js:319:10)
webapi_1  |     at Module._compile (internal/modules/cjs/loader.js:686:28)
webapi_1  |     at Object.Module._extensions..js (internal/modules/cjs/loader.js:734:10)
webapi_1  |     at Module.load (internal/modules/cjs/loader.js:620:32)
webapi_1  |     at tryModuleLoad (internal/modules/cjs/loader.js:560:12)
webapi_1  |     at Function.Module._load (internal/modules/cjs/loader.js:552:3)
webapi_1  |     at Module.require (internal/modules/cjs/loader.js:659:17)
webapi_1  |     at require (internal/modules/cjs/helpers.js:22:18)

which is very weird

[remy]

Yeah, my bad for being a plum. Re-install and .6 is good 😢

[xDelph]

great, it's ok now
thanks for your help ;)

[justinpage]

As described in #1476 I'm still seeing this issue with 1.18.9.

The issue is intermittent with the following start command:

./node_modules/.bin/nodemon --inspect=0.0.0.0:9229 ./index.js

[JonDum]

I get this issue all the time. Not sure when exactly it started happening, but it didn't use to happen.

node v11.11.0 via alpine-v11

─┬ [email protected]
  └── [email protected]

"dev": "nodemon -L -d 2 --inspect=0.0.0.0:9229 -- --icu-data-dir=$NODE_ICU_DATA_PATH index.js"

Would be happy to retrieve any logs or additional info to help narrow this down.

[srfrnk]

I get this issue all the time. Not sure when exactly it started happening, but it didn't use to happen.

node v11.11.0 via alpine-v11

─┬ [email protected]
  └── [email protected]

"dev": "nodemon -L -d 2 --inspect=0.0.0.0:9229 -- --icu-data-dir=$NODE_ICU_DATA_PATH index.js"
Would be happy to retrieve any logs or additional info to help narrow this down.

@JonDum - Happens to me as well. See logs below:

[nodemon] starting `node --inspect -r ts-node/register ./src/index.ts`
Debugger listening on ws://127.0.0.1:9229/5c2962b0-43a0-4210-93ac-fc81e6d537f8
For help, see: https://nodejs.org/en/docs/inspector
Example app listening on port 3000!
[nodemon] restarting due to changes...
[nodemon] starting `node --inspect -r ts-node/register ./src/index.ts`
Debugger listening on ws://127.0.0.1:9229/f0c7fdda-8b0f-4ebe-8a79-37099d8596d6
For help, see: https://nodejs.org/en/docs/inspector
Example app listening on port 3000!
[nodemon] restarting due to changes...
[nodemon] starting `node --inspect -r ts-node/register ./src/index.ts`
Debugger listening on ws://127.0.0.1:9229/3336a7df-a763-440e-9e92-20ec0811726b
For help, see: https://nodejs.org/en/docs/inspector
Example app listening on port 3000!
[nodemon] restarting due to changes...
[nodemon] starting `node --inspect -r ts-node/register ./src/index.ts`
[nodemon] restarting due to changes...
Debugger listening on ws://127.0.0.1:9229/cc164e40-316f-4b07-8bc2-c2dc80f5d515
For help, see: https://nodejs.org/en/docs/inspector
[nodemon] starting `node --inspect -r ts-node/register ./src/index.ts`
Debugger listening on ws://127.0.0.1:9229/86884f82-93b2-4885-a580-3f29b00f1065
For help, see: https://nodejs.org/en/docs/inspector
Example app listening on port 3000!
[nodemon] restarting due to changes...
[nodemon] starting `node --inspect -r ts-node/register ./src/index.ts`
[nodemon] app crashed - waiting for file changes before starting...
Starting inspector on 127.0.0.1:9229 failed: address already in use
[nodemon] restarting due to changes...
[nodemon] starting `node --inspect -r ts-node/register ./src/index.ts`
[nodemon] app crashed - waiting for file changes before starting...
Starting inspector on 127.0.0.1:9229 failed: address already in use
[nodemon] restarting due to changes...
[nodemon] starting `node --inspect -r ts-node/register ./src/index.ts`
[nodemon] app crashed - waiting for file changes before starting...
Starting inspector on 127.0.0.1:9229 failed: address already in use
[nodemon] restarting due to changes...
[nodemon] starting `node --inspect -r ts-node/register ./src/index.ts`
[nodemon] app crashed - waiting for file changes before starting...
Starting inspector on 127.0.0.1:9229 failed: address already in use

[csalvato]

Happens to me as well:

nodemon@^1.18.11:
  version "1.18.11"
  resolved "https://registry.yarnpkg.com/nodemon/-/nodemon-1.18.11.tgz#d836ab663776e7995570b963da5bfc807e53f6b8"
  integrity sha512-KdN3tm1zkarlqNo4+W9raU3ihM4H15MVMSE/f9rYDZmFgDHAfAJsomYrHhApAkuUemYjFyEeXlpCOQ2v5gtBEw==
  dependencies:
    chokidar "^2.1.5"
    debug "^3.1.0"
    ignore-by-default "^1.0.1"
    minimatch "^3.0.4"
    pstree.remy "^1.1.6"
    semver "^5.5.0"
    supports-color "^5.2.0"
    touch "^3.1.0"
    undefsafe "^2.0.2"
    update-notifier "^2.5.0"

Not sure why it's happening. Here's my package.json script...:

"dev": "nodemon app.js --exec babel-node --inspect --"

[srfrnk]

Maybe my workaround can help you guys:
https://stackoverflow.com/questions/43898947/docker-node-app-always-crashes-on-file-change-using-nodemon/55881699#55881699

[Shahor]

Sorry for upping this, but I'm having the exact same issue :|

It's fine in my case because it's running in docker, but that's probably not something fine

[ssas01]

My code is wrong, so it appears.

[nanxiaobei]

Just add --delay 300ms into the command solved my problem.

https://github.com/remy/nodemon#delaying-restarting