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Critical Incident · P0

Google

All Auth Down

Problem

YouTube, Gmail, Google Meet, and Google Drive are all down. Every service requiring a Google login is returning authentication errors. Over a billion active users affected.

Error type

429 Too Many Requests — all auth failing

Services affected

All login-dependent services

Incident started

03:44:01 UTC

Infrastructure

Cloud

GCP multi-region

Auth service

User ID Service

Protocol

OAuth 2.0 / OIDC

Database

Cloud Spanner

Scope

Global

Fleet size

4,200 instances

🔍 Investigation Tools

Services

Capacity

Observability

⏱️ Incident Timeline

03:41 UTC

Sporadic 401 errors on YouTube — initial reports from US users.

03:43 UTC

Gmail, Meet, and Drive also returning auth errors — all Google services affected.

03:44 UTC

P0 declared — authentication failing globally. All login-dependent services down.

Incident Workspace

Service Health

Scope

Global

All auth-dependent services failing — 401 errors across the board

Every Google service that requires a user to be logged in is returning authentication errors. Services with no login requirement are unaffected.

ServiceStatusError

YouTube

DOWN

401 — authentication required

Gmail

DOWN

401 — authentication required

Google Meet

DOWN

503 — auth service unavailable

Google Drive

DOWN

401 — authentication required

Google Docs

DOWN

401 — authentication required

Google Calendar

DOWN

401 — authentication required

Google Search (logged in)

DEGRADED

Personalization unavailable

Google Search (public)

HEALTHY

—

Google Maps (public)

HEALTHY

—

Services down

all requiring login

Users affected

1B+

active Google accounts

Public services

100%

no auth, no impact

P0 · Production Incident

Google · Dec 14, 2020

All Auth Down.

SMS Alert · 03:47 UTC

ALERT: YouTube, Gmail, Meet, Drive all returning auth errors. 100% failure rate on all login-dependent services. 1B+ users affected. Auth service up but rejecting all requests.

Every Google service requiring a login is down simultaneously. The auth service is running — it just isn't serving any requests. PagerDuty and email alerts are also failing, so you were paged by SMS.

Find why authentication is failing and restore it.