Can't embark on merge train: `Unable to update: user X is unknown.`

[JohanLorenzo]

Expected Behavior

Github users can use a Github label to get their PR embarked on a merge train.

Actual Behavior

Here's the error message we currently get:

This pull request cannot be embarked for merge

The merge queue pull request can't be updated
Details:

Unable to update: user MozillaNoah is unknown.

Please make sure MozillaNoah has logged in Mergify dashboard.

Source: https://github.com/mozilla-mobile/firefox-android/pull/1217/checks?check_run_id=11997595835

Steps to Reproduce the Problem

1. Have a user part of our Github organization mark a PR ready to embark on a merge train
2. Wait for CI to complete
3. When CI is ready, PR gets the error message above ⬆️

I'm not 100% sure but this looks like a recent regression. No one on the team has ever got this problem.

cc @rvandermeulen

Specifications

• Pull Request URLs:
  • Bug 1814994 - Create Tabs Tray list and grid layouts mozilla-mobile/firefox-android#1217
  • Bug 1807268 - Disable toggleSearchBookmarksAndHistoryTest UI test mozilla-mobile/firefox-android#1234
  • we had to manually rebase the following:
    • Bug 1821715 - Update OnboardingPageState to include button actions mozilla-mobile/firefox-android#1204
    • Bug 1822198 - use relbot 6.0.0 mozilla-mobile/firefox-android#1232
  • this one did work though Bug 1822244 - remove ac-create-release workflow mozilla-mobile/firefox-android#1228
• Mergify Config URL: https://github.com/mozilla-mobile/firefox-android/blob/2d0ce92593ecb04e24397c3947d1c8862c76041f/.mergify.yml

[sileht]

This error is related to this change:

https://changelog.mergify.com/changelog/rebasing-pull-requests-with-a-random-user-is-deprecated

[JohanLorenzo]

TIL https://changelog.mergify.com/ 👍 Speaking of which, is there an RSS/Atom feed I can follow?

That sounds good, we'll look into how we can solve this on our side. Thanks a bunch for the quick answer and the pointer 👌

[JohanLorenzo]

ℹ️ We'll get this resolved on our side in bug 1822491.

[jcristau]

@sileht Is there a workaround for this that doesn't require a premium plan?

[jd]

TIL https://changelog.mergify.com/ 👍 Speaking of which, is there an RSS/Atom feed I can follow?

@JohanLorenzo no RSS feed for now, sorry 😢

We're working on a fix to make work again the queue action when using rebase. It should land by end of the week.

[jcristau]

@jd any update on a fix? Thanks :)

[riya-singhal31]

Is there any update on this, till when it can get fixed.
Thanks!

[Madhu-1]

@jd, any workaround or suggestions on this one? We are using mergify with cephcsi to auto-merge PR's, we are currently blocked for PR merging. One example instance is here https://github.com/ceph/ceph-csi/pull/3738/checks?check_run_id=12653144572