Plan error: Fail to send the GET request to github API (404 Not Found)

[tchelovilar]

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Overview of the Issue

Atlantis fails to execute the terraform plan after PR creation because doesn't find the PR. Seems that the Atlantis send the PR info request too fast to the github API and it's not available yet.

Reproduction Steps

I'm setting the webhook directly in the repository settings. Sometimes after creating the PR, the Atlantis is not able to find it on Github API. After sending a comment with atlantis plan, the plan works as usual.

Logs

PR comment from Atlantis

GET https://github.com/gitapi/repos/{OWNER}/{REPO}/pulls/24/files?per_page=300: 404 Not Found []

Server Log:

{"level":"error","ts":"2022-01-19T08:26:11.231Z","caller":"events/pull_updater.go:14","msg":"GET https://github.com/gitapi/repos/owner/repo/pulls/24/files?per_page=300: 404 Not Found []","json":{"repo":"owner/repo","pull":"24"},"stacktrace":"github.com/runatlantis/atlantis/server/events.(*PullUpdater).updatePull\n\tgithub.com/runatlantis/atlantis/server/events/pull_updater.go:14\ngithub.com/runatlantis/atlantis/server/events.(*PlanCommandRunner).runAutoplan\n\tgithub.com/runatlantis/atlantis/server/events/plan_command_runner.go:77\ngithub.com/runatlantis/atlantis/server/events.(*PlanCommandRunner).Run\n\tgithub.com/runatlantis/atlantis/server/events/plan_command_runner.go:221\ngithub.com/runatlantis/atlantis/server/events.(*DefaultCommandRunner).RunAutoplanCommand\n\tgithub.com/runatlantis/atlantis/server/events/command_runner.go:163"}

[AntonUspishnyi]

We have the same errors, which started several days ago.

[AntonUspishnyi]

Duplicates #1905