Changes / GitLab / GitLab Duo Chat (classic) returning errors
GitLab: Major incident: GitLab Duo Chat (classic) returning errors
Summary
Summary pending. The diff below shows exactly what changed.
Incident page: full timeline of updates →
What changed
Before: not present
After: GitLab Duo Chat (classic) returning errors
Before: not present
After: major
Before: not present
After: resolved
Before: not present
After: 2025-09-04 23:33 UTC
Before: not present
After: 2025-09-05 00:33 UTC
Before: not present
After: GitLab Duo
Before: not present
After: Our team is currently investigating an issue with Duo Chat (classic). Users may experience A1004 errors. Duo Chat (Agentic) is working normally
Before: not present
After: All messages to Duo Chat classic are currently receiving A1004 errors. Duo Chat (Agentic) is working normally. Our team is currently investigating. For more information, see https://gitlab.com/gitlab-com/gl-infra/production/-/issues/20483
Before: not present
After: A recent change has been reverted and confirmed as the cause. Duo chat (Classic) is now working. For details, see https://gitlab.com/gitlab-com/gl-infra/production/-/issues/20483
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History of this incident
| When (UTC) | Change | Kind |
|---|---|---|
| Major incident: GitLab Duo Chat (classic) returning errors (this change) | Major incident |