At 3:17 AM on a Tuesday in Q3 2024, our production Kotlin 2.0 microservice fleet hit a 92% memory utilization threshold across 140 nodes, traced to a silent coroutine leak in Ktor 2.2’s request pipeline that had been bleeding 12MB of heap per second for 72 hours. We lost $14k in SLO credits before we found the root cause. A Couple Million Lines of Haskell: Production Engineering at Mercury (78 p
When you run Mirror and Socket.IO in the same Unity project, you immediately hit a translation problem. Mirror identifies players by netId — a uint assigned at spawn time by the Mirror host. Socket.IO identifies players by playerId — a string assigned by your Node.js backend when they connect. These two IDs have nothing to do with each other. They're generated by different systems at different tim