Stop Slamming Downstream Services: Singleflight Request Coalescing with Java Virtual Threads Virtual threads solved your JVM I/O bottlenecks, but downstream internal services are now on fire because 50,000 concurrent threads are fetching the exact same cache miss simultaneously. You do not need distributed locks or larger database instances; you need the Singleflight request coalescing pattern inside your JVM. Why Most Developers Get This Wrong Reaching for distributed lo...