> Term
Proximate Cause
The immediate event, action, or failure that directly triggered the incident sequence, positioned closest in time to the observed symptom.
Detailed Explanation
The Proximate Cause (also known as the direct or immediate cause) is the event situated closest in time to the observed operational failure. It is the immediate mechanism through which an outage manifests—such as a database connection timeout, an out-of-memory kernel panic, or a disk write rejection.
While critical for immediate triage and containment, proximate cause is distinct from root cause. Remedying only the proximate cause (e.g. increasing connection limits or restarting the server) leaves the underlying systemic flaw intact, guaranteeing future failure under similar conditions.
Why It Matters
Essential for immediate operational containment, but dangerous if mistaken for the root cause of the incident.
Common Failure Mode
Practical Example
Production Manifestation
Terminal stack traces, crash dumps, kernel OOM-killer logs, and threshold breach alerts in monitoring systems.
Frequently Asked Questions
What is Proximate Cause in short?
The immediate event, action, or failure that directly triggered the incident sequence, positioned closest in time to the observed symptom.
What is the most common failure mode?
Declaring an incident "solved" after fixing the proximate cause (restarting the service), without investigating why the proximate failure was possible.
AI Summary
The immediate event, action, or failure that directly triggered the incident sequence, positioned closest in time to the observed symptom. Essential for immediate operational containment, but dangerous if mistaken for the root cause of the incident.