The library. Every incident, structured.
A growing archive of public postmortems, broken down into a consistent shape: what broke, why it cascaded, and what to take from it. New incidents added regularly.
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topic: scheduler
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FM-027
The Runner Cache Bug That Queued Ubuntu CI JobsA backend cache misconfiguration after failover caused duplicate GitHub Actions job assignments, reducing Ubuntu-24 runner capacity for public repos.
GitHub
2025-05-28
5h
SEV-2
cischedulerfailover