How One Engineer Debugged a Race Condition in a Redis Lock
from The Software Engineering Podcast with Fexingo: Code, Architecture, and Engineering Best Practices Hosted by Fexingo
In this episode of The Software Engineering Podcast with Fexingo, Lucas and Luna dive into a single tricky bug: a distributed lock implemented with Redis that caused intermittent failures in a high-traffic checkout system. They walk through the engineer's discovery of a missing atomicity guarantee in the lock acquisition path, the specific race window that allowed two processes to acquire the same lock, and the fix using Redis's SET NX EX command with a Lua script. Along the way they discuss why distributed locking is harder than it looks, the tradeoffs of using Redis versus a consensus-based system, and how a small oversight can cascade into lost revenue. If today's conversation gave you something usable, consider supporting the show at buy me a coffee dot com slash fexingo. #SoftwareEngineering #Technology #Redis #DistributedSystems #Concurrency #Debugging #RaceCondition #Locking #CheckoutSystem #LuaScript #Atomicity #ProductionBug #Engineering #Podcast #FexingoBusiness #BusinessPodcast #Code #Architecture Keep every episode free: buymeacoffee.com/fexingo
Embed this episode
No transcript yet.