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• 15:32, 14 November 2025 PC talk contribs created page The Rust Concurrency Bug That Slept for Weeks — Until One Log Line Woke It Up (Created page with "I was on call.
The pager lit up.
Latency climbed.
Error rates rose.
I did not know why. Why this matters Short outages expose more than downtime. They reveal brittle assumptions about concurrency, hidden contention, and how observability can both help and hurt. In Rust services that run with high parallelism, a small instrumentation change can change scheduling and memory behavior. That matters for latency-sensitive pipelines, async workers, build-times, and an...")