Keynote: The Hitchhiker’s Guide to the Unexpected
summary
Argues for designing supervision trees on the whiteboard and shows concrete tooling and fixes: uses Erlang/Elixir OTP supervisors, let it crash semantics, Dialyzer and tracing to debug BEAM, fuzzing plus property‑based testing (QuickCheck/stream_data) to generate and shrink surprising multi‑step failures, and a local chaos harness that kills workers to reveal a bad‑match disconnected bug fixed by returning ok/error tuples. Demonstrates dead‑letter queues, exponential backoff with jitter, and circuit breakers as practical, testable mitigations.
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