Cypress hung up trying to run a spec - won't resolve

[ccannawright]

Current behavior

Can't reproduce this locally - but intermittently when running specs via circleci (so far 50% of the time) - one of the specs (never the same one), spins causing circleci to timeout. When I look at the run in the Cypress dashboard it shows all the rest of the specs have passed except for that one and it's just constantly saying it is running - but shows no test results. https://dashboard.cypress.io/projects/zb7814/runs/1686/overview is an example. When I rerun the tests they all pass again so it looks like there's an issue with the cypress runner. This just started happening when we upgraded to 8 - specifically 8.2

The error from circleci is:

ERR_TIMED_OUT (-7) loading '<specUrl>'
Error: ERR_TIMED_OUT (-7) loading '<specUrl>
    at rejectAndCleanup (electron/js2c/browser_init.js:217:1457)
    at Object.failListener (electron/js2c/browser_init.js:217:1670)
    at Object.emit (events.js:315:20)

After saying it was still running for several hours on the Cypress dashboard - it finally stopped and showed this error message:
"The run started, but never completed. This can happen when the run is canceled from CI or when Cypress crashes during running tests.

Check your CircleCI #557d91f7-1bed-4c21-9f3c-9a4850bc64ad logs for more information. Archive this run to remove it from the runs list and analytics."

Desired behavior

Cypress not to get hung up

Test code to reproduce

Since it fails on a different spec each time, it doesn't seem to be related to actual test code

Cypress Version

8.2.0

Other

No response

[jennifer-shehane]

Runs automatically cancel after 1.5 hours of not getting a signal from CI for the current run.

Could you run Cypress in debug mode mode and print the entire set of logs here for a hanging spec?

I can't directly see any relation to 8.2.0 knowing what's in there. Were there any other changes made to your code/app/CI settings?

[rbayliss]

We've also started seeing this very sporadically since upgrading from 8.0.0 -> 8.2.0. I've seen it 2x in ~50 runs, so it's definitely not something I can reliably replicate yet.

[ccannawright]

debug mode seems to only work locally, not in circleci where I'm seeing the issue

[baviereteam]

I have noticed the same problem on my attempt to upgrade to 8.2.0, on 100% of my 8.2.0 builds on Jenkins (but not always on the same spec). The time between starting Cypress and the failure happening isn't consistent (ranges from 5 to 15 minutes).
No problems on 8.0.0. The same test run also executes correctly with 8.2.0 on my own (Windows 10) computer.
However, when I enable debug mode (with DEBUG=*), I can't reproduce it anymore and the whole test run passes.

Is there something else I can look into to help identify the cause of this problem?

[danmaftei]

Some more notes:

• We're on Cypress 7.6.0
• It occurs very rarely (twice out of hundreds of runs)
• The timeout happens about a minute after Cypress logs "Running: <spec.js>"
• Has only happened on the first spec of the test suite, and after the timeout, no more tests are run and the cypress run --config video=true command exits with exit code 1

[sergeikabuldzhanov]

Seeing a lot more occurrences of this error after upgrading from 8.2.0 to 8.3.0. Affected almost every run.

[gbparada28]

We're having this exact same issue when running in CI after upgrading from 6.6.0 to 8.0.0. Tried upgrading further to 8.3.0 but the problem remains. The weird part is that the issue seems to not happen when we run with the debug mode. Normally it occurs almost every run. Some of the plugins we're using are cypress-cucumber-preprocessor and cypress-visual-regression if the information would be of any use.

[rbayliss]

I can confirm the fact that it doesn't seem to happen with debug mode enabled (tried a dozen or so test runs). We do not use cypress-cucumber-preprocessor or cypress-visual-regression plugins.

[gbparada28]

We found a workaround. Could not reproduce the problem anymore after disabling video recording (setting "video": false in cypress.json). But unfortunately we have no more info than this about the problem.

[joelmeiller]

The Error happens in our Azure Pipeline as well (Cypress 8.3.1).
Trying now to disable video and see if that does the trick. Thanks for the hint! 🙌🏻

[verheyenkoen]

Noticed the same on GitHub Action runs. Failed at the same point (while loading our catalog/services.spec.js file) 5 or 6 times in the last 10 days, however some test runs also completed successfully within that period.

Failing GitHub Action run
Raw log

[pyttroll]

Random tests have been failing with the same ERR_TIMED_OUT error for the last 3 weeks.
Our test suite has 88 tests, parallelized on 6 machines.
Note that this only happen to 1 random spec per run, we always get 87 successes and one time out, but the spec timing out randomly changes.

[pyttroll]

We found a workaround. Could not reproduce the problem anymore after disabling video recording (setting "video": false in cypress.json). But unfortunately we have no more info than this about the problem.

Disabling videos did not work for us.