Probably this: https://aws.amazon.com/message/41926/

No. That was operational modification of system state using existing tools. The “miss” was an intended subset filter that was not interpreted correctly.

> an authorized S3 team member using an established playbook executed a command which was intended to remove a small number of servers for one of the S3 subsystems that is used by the S3 billing process. Unfortunately, one of the inputs to the command was entered incorrectly and a larger set of servers was removed than intended.

As of a while back that entire state management subsystem, which dates from the very beginning of AWS, has been replaced.

Source: me. I was oncall for (some of) the incident management of that event.