Could not connect to the debugger when using the default port (0)

Expected Behavior

Recently, I upgraded our project from Angular 8.x to 9.x, Nest 6.x to 7.x and Nx 8.x to 9.x. Since then the debugger could not connect to the process.

Current Behavior

After the upgrade and migration, only passWithNoTests been added to the angular.json and there were no changes to nx.json and any of the tsconfigs. It is not working even without the changes to the files and only using the upgraded dependencies.

I am running the project from the terminal using ng serve and I tried reopening VScode, removing/reinstalling node_modules and also debugging using the Chrome’s dedicated Node DevTools for Node.js.

When adding port to the options in angular.json it works without any problem. So it is probably related to #2510.

Steps to Reproduce

You can find my repro here. In master branch you can find the files before the upgrade, and in nx9 branch the upgraded version.

Or just run the following steps:

1. Create a new workspace using the latest v8:

   npx create-nx-workspace@8.12.9 repro-nx-nest-debug
   

2. Upgrade nx:

   yarn update
   

3. Add a breakpoint and run the api:

   yarn start api
   

4. Try to attach to the process using the options Debug: Attach to Node process from the Command Palette....

Context

• I’m using VSCode 1.43.1 and Node.js 12.8.1

nx report

  @nrwl/angular : 9.1.2
  @nrwl/cli : 9.1.2
  @nrwl/cypress : 9.1.2
  @nrwl/eslint-plugin-nx : Not Found
  @nrwl/express : Not Found
  @nrwl/jest : 9.1.2
  @nrwl/linter : 9.1.2
  @nrwl/nest : 9.1.2
  @nrwl/next : Not Found
  @nrwl/node : 9.1.2
  @nrwl/react : Not Found
  @nrwl/schematics : Not Found
  @nrwl/tao : 9.1.2
  @nrwl/web : Not Found
  @nrwl/workspace : 9.1.2
  typescript : 3.7.5

Relevant packages

  @angular-devkit/build-angular@0.900.6
  @angular/cli@9.0.6
  @angular/common@9.0.7
  @angular/compiler@9.0.7
  @angular/compiler-cli@9.0.7
  @angular/core@9.0.7
  @nestjs/common@7.0.3
  @nestjs/core@7.0.3
  @nestjs/jwt@7.0.0
  @nestjs/passport@7.0.0
  @nestjs/platform-express@7.0.3
  @nestjs/platform-socket.io@7.0.3
  @nestjs/schematics@7.0.0
  @nestjs/serve-static@2.1.0
  @nestjs/swagger@4.4.0
  @nestjs/testing@7.0.3
  @nestjs/typeorm@7.0.0
  @nestjs/websockets@7.0.3
  core-js@3.6.4
  ts-node@8.6.2
  tslib@1.11.1

Relevant project configuration in angular.json

  "server": {
    "root": "apps/server",
    "sourceRoot": "apps/server/src",
    "projectType": "application",
    "prefix": "server",
    "schematics": {},
    "architect": {
      "build": {
        "builder": "@nrwl/node:build",
        "options": {
          "outputPath": "dist/apps/server",
          "main": "apps/server/src/main.ts",
          "tsConfig": "apps/server/tsconfig.app.json",
          "assets": ["apps/server/src/assets"]
        },
        "configurations": {
          "production": {
            "optimization": true,
            "extractLicenses": true,
            "inspect": false,
            "fileReplacements": [
              {
                "replace": "apps/server/src/environments/environment.ts",
                "with": "apps/server/src/environments/environment.prod.ts"
              }
            ]
          }
        }
      },
      "serve": {
        "builder": "@nrwl/node:execute",
        "options": {
          "buildTarget": "server:build"
        }
      },
      "lint": {
        "builder": "@angular-devkit/build-angular:tslint",
        "options": {
          "tsConfig": [
            "apps/server/tsconfig.app.json",
            "apps/server/tsconfig.spec.json"
          ],
          "exclude": ["**/node_modules/**", "!apps/server/**"]
        }
      },
      "test": {
        "builder": "@nrwl/jest:jest",
        "options": {
          "jestConfig": "apps/server/jest.config.js",
          "maxWorkers": 3,
          "tsConfig": "apps/server/tsconfig.spec.json",
          "passWithNoTests": true
        }
      }
    }
  }

[fsystemdevelopment]

For anyone having the same issue, fast solution add port to angular.json in section see attached

[micaelmbagira]

@Cammisuli Do you have an example (launch.json) config that works with the new VSCode debugger and "port": 0?