Going Dark

Definitions

Becoming unavailable, silent, or invisible, whether that means a system stops reporting or a person stops responding. In engineering slang, going dark is worrying because it removes feedback right when certainty matters most.
In plain English: Becoming silent, unavailable, or invisible to monitoring or communication.
Example: "The worker pool kept going dark in telemetry before every backlog spike, which made the observability gap a core part of the problem, not just a side annoyance."