4. Google’s global sign‑in failure (2020)
On 14 Dec 2020 an internal quota file for Google’s authentication back‑end was set to zero during a routine update. Every service that relies on Google‑sign‑in—Gmail, YouTube, Drive, Nest, third‑party OAuth—returned 500/401 for 45 minutes.
Why it happened: Config change bypassed two‑person review; no chaos‑conf test for “nil quota”.
Take‑away: Treat configs as code: staged roll‑outs, automated linting, and fault injection in staging to surface update issues before they reach production.
Source: The Guardian
5. Facebook/Meta’s six‑hour blackout (2021)
A backbone script withdrew every Facebook AS‑number from the global routing table on 4 Oct 2021, taking down Facebook, Instagram and WhatsApp plus the internal VPN engineers needed to fix it.
Why it happened: No content delivery network can help if the DNS itself vanishes. Single control‑plane for production traffic and admin access.
Take‑away: Keep break‑glass DNS and an out‑of‑band management network so a BGP typo doesn’t strand your ops team.
Source: Reuters
6.Taylor Swift breaks Spotify (and Ticketmaster) (2022)
At midnight ET on 21 Oct 2022, Swift’s Midnights album drew nearly 8 000 outage reports as Spotify’s cluster hit concurrency limits; the album went on to smash the platform’s single‑day stream record. Three weeks later Ticketmaster’s Eras Tour presale saw 3.5 million verified fans—and the queueing system imploded.
Why it happened: Write‑heavy playlist saves on Spotify; on Ticketmaster, mis‑configured bot‑mitigation and seating inventory locks.
Take‑away: Viral “fan frenzies” demand scaled‑out session stores and traffic‑shaping at the edge—not just bigger EC2 instances.
Source: CBS News
7. Coinbase QR ad overloads Super Bowl landing page (2022)
A 60‑second Super Bowl ad showing a bouncing QR code drove more than 20 million visits in a single minute, briefly crashing Coinbase’s landing page and app.
Why it happened: Static landing file on a single origin; CDN mis‑configuration skipped edge caching.
Take‑away: Pre‑warm the CDN, use server‑side rate limiting, and have a light‑weight static fallback ready for bursts of massive traffic.
Source: Decrypt
8. UCAS results‑day wobble (2023)
On results day, log‑ins to UCAS Clearing surged far beyond the 2022 peak, briefly overwhelming server capacity. The site returned 500 error messages for roughly 15 minutes, until the autoscaling group spun up extra instances and restored normal traffic flow.
Why it happened: Under‑sized autoscaling group and sticky sessions.
Take‑away: Events with a set timestamp (A‑level results, Cyber Monday, ticket drops) need pessimistic models—test at ten times last year’s peak website performance.
Source: The Independent
9. CrowdStrike driver bricks Windows fleets (2024)
On 19 Jul 2024 a faulty Falcon Sensor driver shipped to production, causing 0xEF BSODs on an estimated eight million Windows PCs and paralyzing airports, banks and retailers.
Why it happened: Rapid‑ring release jumped to 100 % without a broad canary; no bulk rollback path.
Take‑away: Kernel‑mode code needs a 1 % → 10 % → 25 % ramp with halt points, plus a signed‑driver rollback channel.
Source: HackerNews
10. X (Twitter) targeted by huge DDoS wave (2025)
The “Dark Storm” botnet launched multi‑terabit reflection floods plus layer‑7 write‑API spam. Legacy POPs still advertising origin IPs suffered rolling blackouts for almost four hours.
Why it happened: Incomplete migration to a new DDoS‑scrubbing provider and leaked origin addresses.
Take‑away: Edge protection is only as strong as the least‑modern node—verify 100 % coverage with red‑team botnet simulations and hide every origin behind the shield.
Source: Cyberscoop
What this means for site owners and hosting providers
Crashes rarely come from a single code error or “bad luck.” They’re the predictable result of untested server capacity, forgotten security vulnerabilities, or brittle single points of failure.
The antidote is continuous load testing, proactive website maintenance, and architectures that assume a server overload, a sudden DDoS attack, or a runaway promotion will happen tomorrow.
- Map real‑world traffic spikes (product launches, sales, media hits).
- Rehearse them with Gatling against staging and canary prod pools.
- Use a reliable hosting provider, autoscaling groups, and a global CDN.
- Keep redundant DNS, health checks, and automated rollback for every deployment.
Do that, and your next headline will celebrate record visitors—not costly downtime.