AUGUST 31, 2022

QUIC Exit: Exposing a New Class of Outage

A crash bug in QUIC handshake code exposed a new class of bugs we termed ‘contagion bugs’. For these bugs, a tiny number of tasks can cause a huge outage and rollbacks don’t work as expected. This talk details what contagion bugs are, discusses the details of the outage, and what we did to prevent and mitigate them going forward.

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