[mekaj]

There was an incident with similar consequences on April 10, 2014. The cause was a programmed threshold being breached and the impact was 6h of downtime.

Source: "The Coming Software Apocalypse" published by The Atlantic (https://www.theatlantic.com/technology/archive/2017/09/savin...)

walrus01 also linked to https://www.fcc.gov/document/april-2014-multistate-911-outag... in another comment.

[PhasmaFelis]

> Operated by a systems provider named Intrado, the server kept a running counter of how many calls it had routed to 911 dispatchers around the country. Intrado programmers had set a threshold for how high the counter could go. They picked a number in the millions.

I'm really curious if there's some explanation that makes this sound less catastrophically stupid, particularly the part where they picked a threshold less than INT_MAX.

[swiftcoder]

What do you mean, VARCHAR(8) is a perfectly valid way of storing counters...

[dharmab]

Allocating pieces of a resource without accounting for reusing released resources?

[MacroChip]

Great question. Maybe they did pick a sensible constant, but it still wasn't enough. I.e. INT_MAX wasn't big enough.