ReferenceIncidents
Era 5 · Series CLeap second or clock skew
A leap second repeated a second of the clock. Timers fired twice, leases expired early, and requests and locks across one region timed out.
What happens#
A leap second repeated a second of the clock. Timers fired twice, leases expired early, and requests and locks across one region timed out.
How to prevent it#
Leap smearing spreads the second over a day, so no clock ever jumps.
The postmortem opens the first of these that you do not own yet: