# August 27 outage: Incident report

DevFeed: [August 27 outage: Incident report](<https://devfeed.tech/articles/august-27-outage-incident-report-50730.md>)

Original publisher: [Read original article](<https://proton.me/blog/august-27-outage-incident-report>)

Author: Bart Butler

Published: 2026-08-28T21:12:56Z

Content type: news

Language: en

Sources: [The Proton Blog](<https://devfeed.tech/sources/the-proton-blog.md>)

Topics: [incident](<https://devfeed.tech/topics/incident.md>), [data centers](<https://devfeed.tech/topics/data-centers.md>), [Database](<https://devfeed.tech/topics/database.md>), [Network](<https://devfeed.tech/topics/network.md>), [Hardware](<https://devfeed.tech/topics/hardware.md>)

Tags: [company-news](<https://devfeed.tech/tags/company-news.md>), [data-center](<https://devfeed.tech/tags/data-center.md>), [database](<https://devfeed.tech/tags/database.md>), [failover](<https://devfeed.tech/tags/failover.md>), [hardware](<https://devfeed.tech/tags/hardware.md>), [incident](<https://devfeed.tech/tags/incident.md>), [incident-report](<https://devfeed.tech/tags/incident-report.md>), [outage](<https://devfeed.tech/tags/outage.md>), [proton-updates](<https://devfeed.tech/tags/proton-updates.md>), [report](<https://devfeed.tech/tags/report.md>), [split-brain](<https://devfeed.tech/tags/split-brain.md>)

## AI overview

Proton reports that a cooling-system failure at its Frankfurt datacenter caused servers and networking equipment to fail, resulting in a widespread outage. The report describes database redundancy and failover decisions made during the incident, including concerns about split-brain risks and failing over within the affected datacenter.

## Source excerpt

Here's a timeline of what happened, what choices we made during the incident and why, and how it was resolved.