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GitLab: Elevated Errors Affecting AI Gateway Health Checks

Affected components: GitLab Duo

Timeline of updates

1. investigating2026-07-14 22:47 UTC

   We're aware of elevated errors affecting AI Gateway health checks. We've identified a likely cause and are actively working on a fix. Details in: https://gitlab.com/gitlab-com/gl-infra/production/-/work_items/22519

2. identified2026-07-14 23:02 UTC

   We have identified the problematic change causing this behavior and are working to revert it. Details will be shared in: https://gitlab.com/gitlab-com/gl-infra/production/-/work_items/22519

3. identified2026-07-14 23:37 UTC

   We're continuing to work on reverting the change causing this issue. Details will be shared in: gitlab.com/gitlab-com/gl-infra/production/-/work_items/22519

4. identified2026-07-15 00:00 UTC

   The revert remains in progress. Additional updates will be shared in: https://gitlab.com/gitlab-com/gl-infra/production/-/work_items/22519

5. monitoring2026-07-15 00:24 UTC

   Deployment for the revert has reached production. Manual verification is successful with error rates trending down. We are continuing to monitor. Details: https://gitlab.com/gitlab-com/gl-infra/production/-/work_items/22519

6. monitoring2026-07-15 00:37 UTC

   We are monitoring the situation to ensure that services have returned to normal. Details: https://gitlab.com/gitlab-com/gl-infra/production/-/work_items/22519

7. resolved2026-07-15 00:47 UTC

   We are seeing error rates return to normal. This issue has been resolved. Details at https://gitlab.com/gitlab-com/gl-infra/production/-/work_items/22519

Rewindex changes for this incident

• Major incident: Elevated Errors Affecting AI Gateway Health Checks 2026-07-14 22:47 UTC

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