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GitLab: 500 errors across several REST and GraphQL API endpoints

Affected components: API

Timeline of updates

1. identified2026-03-17 08:18 UTC

   We have identified a code change that provokes 500 errors for API requests. We are currently reverting the change. Workaround in: https://gitlab.com/gitlab-com/gl-infra/production/-/work_items/21573

2. identified2026-03-17 09:27 UTC

   The revert change has been merged, users will still experience 500 errors until the fix reaches production. We estimate it will be fully deployed at the end of EMEA day. More details in https://gitlab.com/gitlab-com/gl-infra/production/-/work_items/21573

3. identified2026-03-17 12:31 UTC

   The fix has now reached Canary environment, users can enable it by clicking "Next" at https://next.gitlab.com/ until the fix reaches production. More details: https://gitlab.com/gitlab-com/gl-infra/production/-/work_items/21573

4. monitoring2026-03-17 15:22 UTC

   The fix has reached production and users should not experience 500 errors on API calls. We will be monitoring the fix before marking this incident as Resolved. More details https://gitlab.com/gitlab-com/gl-infra/production/-/work_items/21573

5. resolved2026-03-17 20:40 UTC

   Our metrics indicate this is now fixed. We will now be marking this as resolved. Details in: https://gitlab.com/gitlab-com/gl-infra/production/-/work_items/21573

Rewindex changes for this incident

• Major incident: 500 errors across several REST and GraphQL API endpoints 2026-03-17 08:18 UTC

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