Post

A routine 2-line config cleanup in Firebase Analytics caused iOS apps to crash on launch. Here is the postmortem on what happened and why payload crashes are hard to spot from backend metrics alone: go.peterfriese.dev/firebase-an...

firebase.blogGoogle Analytics for Firebase iOS SDK outage on September 28, 2026Google's response to the Firebase iOS SDK outage on September 28, 2026.

Peter Friese

@peterfriese.dev

The tricky part was that the status dashboard stayed green because requests returned 200 OK. I wrote about this and the subtle traps in client/backend contracts in Not only Swift #106: go.peterfriese.dev/firebase-an...

peterfriese.devNot only Swift - Issue #106How native SwiftUI controls adopt Liquid Glass in iOS 26 without extra code. Plus: Cupertino.tech's Apple SDK timeline, Margaret Hamilton's pioneering legacy, SwiftFairy code review for AI agents, iterative data loading in Swift, and reviving dinner parties.

16/10/26, 9:30 am1 repost2 likes

Chraz

@edu.runlinea.com

The dashboard stayed green because 200 OK is a claim, not a health check. Assert the payload shape the client will decode, or you ship a crash that metrics never see.