Cypress failed to make a connection to the Chrome DevTools Protocol

[Svetlana0107]

Current behavior

Cypress failed to make a connection to the Chrome DevTools Protocol after retrying for 50 seconds.

This usually indicates there was a problem opening the Chrome browser.

The CDP port requested was 56204.

Error details:

Error: connect ECONNREFUSED 127.0.0.1:56204 at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1142:16)

Stack trace

Desired behavior

connect without any issues

Test code to reproduce

demo codes from examples

Cypress Version

9.1.0

Other

No response

[rcauquil]

I have the same issue for both firefox and chromium.

Cypress Version

9.1.1

[PolinaLyzenkova]

same for me

[rcauquil]

@PolinaLyzenkova I solved it this morning, for me it was a typo inside my /etc/hosts
and for another guy I found on a blog post he was missing 127.0.0.1 localhost
let me know how it goes for you

[matiaso]

I had the same issue and I solved it by changing the /etc/nsswitch.conf file on linux to make sure that the files were prioritized over DNS:

hosts: files dns

To check, you can ping localhost and make sure it resolve to 127.0.0.1

In my case, the router's DNS was resolving localhost to 127.0.0.2 which is also a local address, but doesn't work.

[onthespotqa]

@Svetlana0107 did this happen for you locally or in ci? i've been having this issue a lot in ci. i'm on version 9.5.3 now.

[Svetlana0107]

@Svetlana0107 did this happen for you locally or in ci? i've been having this issue a lot in ci. i'm on version 9.5.3 now.

@onthespotqa it’s reproduced locally in my case

[sarthak-verma-bcg]

@Svetlana0107 Any update on this issue? Facing the same issue

[mauro-mendaro-lmnd]

Having the same on my side, any updates on the issue?

[MikeMcC399]

@Svetlana0107

The original issue here referred to

Test code to reproduce
demo codes from examples

Are you still seeing this issue? Which examples are you referring to? Could you provide a URL?

[MikeMcC399]

@mauro-mendaro-lmnd

Having the same on my side, any updates on the issue?

Which version of Cypress are you using? This issue refers to an old version 9.1.0.

Are you also using examples provided by Cypress? If not do you have a public repo where you can show the problem?

[nagash77]

Looking over this thread I don't see any details about which examples folks are referring to. This ticket is also for a quite old version of Cypress. As such I am going to close this issue. If anyone in this thread is still experiencing this issue on the latest versions of Cypress please open a new ticket and we will be happy to investigate.

[lucasbatier]

Hi there, the same issues happened today for me on my GitHub action CI. Can you help me on that ?

Cypress version 12.7.0

Here is the workflow file :

name: On Approved PR Cypress Tests

on:
    pull_request_review:
        types: [submitted]

jobs:
    cypress-run:
        if: github.event.review.state == 'approved'
        runs-on: ubuntu-latest
        steps:
            - name: Checkout
              uses: actions/checkout@v3

            - name: Cypress run
              uses: cypress-io/github-action@v4
              env:
                  CYPRESS_RECORD_KEY: ${{ secrets.CYPRESS_RECORD_KEY }}
              with:
                  config: "viewportWidth=${{ matrix.viewport[0] }},viewportHeight=${{ matrix.viewport[1] }}"
                  browser: ${{ matrix.browser }}
                  group: ${{ matrix.browser }}-${{ matrix.viewport[0] }}x${{ matrix.viewport[1] }}
                  build: yarn run build
                  start: yarn start_dev
                  wait-on: "http://localhost:3000"
                  wait-on-timeout: 300
                  record: true
                  parallel: true
        strategy:
            matrix:
                browser: [chrome]
                viewport: [[1920, 1080], [375, 667]]
                include:
                    - browser: chrome
                    - viewport: [1920, 1080]

[MikeMcC399]

@lucasbatier

Which version of Chrome are you using?

• This may be related to issue ECONNRESET on Chrome/Chromium 117.0.5851.0 when using Cypress <12.15.0 or passing--headless=old in browser launch options #27804

[MikeMcC399]

@lucasbatier

If you see runner-image Version: 20230917.1.0 in your log file, then this image includes Chrome 117 which has a bug that causes Cypress < 12.15.0 to fail.

If possible, update to cypress@^12.15.0 or later.

[ssteezens]

Just commenting in case it helps anyone else. This issue would randomly happen to us (using cypress v13.3.3) in our azure devops pipeline jobs but only when using the windows-2019 image. We have our tests split up to run in 20 different parallel jobs and inevitably at least one of the agents would get this issue. Switching to ubuntu-20.04 fixed the issue for us.

[ritikb01]

Just commenting in case it helps anyone else. This issue would randomly happen to us (using cypress v13.3.3) in our azure devops pipeline jobs but only when using the windows-2019 image. We have our tests split up to run in 20 different parallel jobs and inevitably at least one of the agents would get this issue. Switching to ubuntu-20.04 fixed the issue for us.

Thanks, It helped.