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"Tackling Concurrency Bugs with TLA+" by Hillel Wayne

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Further reading 1

How do you turn a one-off failure into a replayable test? →Suppose an acknowledged transfer disappears during a leader change. Six engineering talks separate reproducible inputs, shrinkable operations and invariants, then ask whether the fix actually exercises the original failure.This video helps answer · What does a counterexample refute?

Caption notes

Wayne models transfers with a no-overdraft invariant. TLC can return the interleaving that violates it, within the states and transitions included in the model.

Video or transcript source ↗
Original passages · 2
find one that violated our invariant it also provided an error trace
"Tackling Concurrency Bugs with TLA+" by Hillel Wayne · ▶ 20:31–20:40
required 17 steps to reproduce the error
"Tackling Concurrency Bugs with TLA+" by Hillel Wayne · ▶ 27:15–27:23

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