Golang Goroutine Pool Patterns: errgroup & Worker Pools
Golang Goroutine Pool Patterns: errgroup & Backpressure Answer-First: Production Go applications manage high concurrency using golang.org/x/sync/errgroup with bounded semaphores or channel-backed worker pools. These patterns enforce backpressure, propagate context cancellation on first error, and prevent uncontrolled goroutine spawning and out-of-memory crashes. Preventing goroutine leaks in high-concurrency worker pools using errgroup. Writing robust worker pools that propagate context cancellation to all active goroutines. Every Go engineer eventually writes the same mistake: a loop that launches goroutines unconditionally. In a demo with 10 items, this works beautifully. In production with 50,000 incoming webhook events, it spawns 50,000 goroutines simultaneously, exhausts memory, and triggers the OOM killer. Kubernetes restarts the pod. The on-call engineer gets paged at 3 AM. ...