Bluesky April 2026 Outage Post-Mortem: Technical Analysis of 8-Hour Service Disruption
By
jcalabro
1mo ago· 6 min readenInsight
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Summary
Bluesky engineer Jim provides a detailed technical post-mortem of a major outage that affected approximately half of Bluesky's users for about 8 hours on a Monday in April 2026. The article explains the root cause, which started over the weekend with unusual request patterns, and details the technical troubleshooting process including database performance issues, connection pool exhaustion, and eventual resolution through infrastructure changes. The post includes technical charts, apologizes to users, and mentions hiring opportunities.
Key quotes
· 5 pulledThis is easily the worst outage we've seen in my time here. It's just not acceptable.
First, I'd like to apologize to our users for the interruption in service.
The issue actually started earlier that weekend.
Second, if you find this work interesting, we're hiring!
The yellow
Hey all! I'm Jim, and I do system-y things at Bluesky. I'm here to give you some details about what happened on Monday of this week that caused Bluesky to go...
