In this engaging discussion, Oxide engineers Dave Pacheco, John Gallagher, and Eliza Weisman tackle the mysterious 'Futurelock' issue found in async Rust. Dave dives into the investigation, revealing how a Nexus instance became unresponsive during a live update. John shares his insights on reproducing the deadlock, while Eliza discusses semaphore implementation details. Together, they explore the conceptual differences between tasks and futures, the hidden challenges of concurrency, and practical fixes to avoid this tricky pathology in the future.
