Three Mutex Deadlock Patterns That Silently Kill Async Rust Services

Mutex deadlocks in async Rust follow predictable patterns that can be diagnosed once you understand them—the opposite of what most resources teach. The author shares three concrete production deadlock scenarios and reveals that the real challenge is diagnosing these failures when a service silently hangs with no errors, zero CPU, and no logs. This matters because the behavioral differences between std::sync::Mutex and tokio::sync::Mutex are critical in production environments.