nx: Cannot terminate the dev server process with `Ctrl+C` while running `nx serve `

Steps to Reproduce

Start dev server using nx serve <app-name> in Zsh or Bash
Server starts on port:4200
Use Ctrl+C to stop the process

Current Behavior

The server is still running on the same port. When you try to start the dev server again the following error appears:

[error] Error: Port 4200 is already in use. Use '--port' to specify a different port.
    at Server.<anonymous> (......./node_modules/@angular-devkit/build-angular/src/angular-cli-files/utilities/check-port.js:27:28)
    at Object.onceWrapper (events.js:417:26)
    at Server.emit (events.js:310:20)
    at emitErrorNT (net.js:1340:8)
    at processTicksAndRejections (internal/process/task_queues.js:84:21)

Note: using ng serve <app-name> works as expected

Expected Behavior

The process is terminated after pressing Ctrl+C When you start a server again the port is available for use

Environment

OS: macOS Shell: Zsh, Bash

nx report:

 @nrwl/angular : 9.5.1
  @nrwl/cli : 9.5.1
  @nrwl/cypress : 9.5.1
  @nrwl/jest : 9.5.1
  @nrwl/tao : 9.5.1
  @nrwl/workspace : 9.5.1
  typescript : 3.8.3

About this issue

Original URL
State: closed
Created 4 years ago
Comments: 24 (3 by maintainers)

Most upvoted comments

Hi @FrozenPandaz @vsavkin,

I’m still encounter this issue in my Nx + Nextjs project with following dependency: "@nrwl/next": "13.5.2"

+13

JKancel on Jan 25, 2022

This is happening to us as well on nx version 14.7.6 and node v16.14.0

goofiw on Oct 20, 2022

Same thing

nx --version
14.8.3

node -v
v14.20.0

OS: MacOS Monterey 12.2.1 (Intel based)

Please, reopen

STih07 on Oct 11, 2022

@vsavkin This is still happening

chicken-suop on Oct 25, 2022

this has started happening for me since upgrading from "@nrwl/cli": "14.3.6" to "@nrwl/cli": "14.7.8".

It was fine on 14.3.

adam-marshall on Sep 28, 2022

NX 14.7.5 I’ve run my server on localhost:8080 and now no matter what I do I can’t use that port. It still tries to serve up that application. I’ve killed every PID resembling 8080 and they come back. Shut down my machine and it still tries to serve the app. Any tips?

jacobkellas on Sep 22, 2022

I’m seeing this as well with 13.5.1, would love to figure out some kind of fix

cwilliamson226 on Feb 1, 2022

Noticed the same error.

urosdragojevic on Sep 30, 2022

Same error here.

eddsaura on Sep 30, 2022

Still present also in 13.5.2

[ ready ] on http://localhost:4200 error - uncaughtException: Error: listen EADDRINUSE: address already in use :::4200

iwarner on May 23, 2022

Having this issue as well with v13.5.2. Running a Nextjs app and despite terminating the process, the port is still running

keevcodes on Jan 27, 2022

The issue has been fixed in Nx 9.6 and Nx 10.1. I’m sorry it took so long to get this right.

vsavkin on Sep 3, 2020