Why are Messenger API rate limits triggering for 40% of applications?

Introduction

The Messenger API rate limit issue affecting 40% of applications is a critical problem that demands immediate attention. This widespread impact suggests a systemic issue rather than isolated incidents. I'll approach this analysis systematically, focusing on identifying the root cause, validating hypotheses, and developing both short-term fixes and long-term solutions.

Step 1

Clarifying Questions (3 minutes)

• Looking at the scale, I'm thinking this might be a recent change. When did we first notice this 40% rate limit issue?

Why it matters: Timing could indicate correlation with recent updates or changes. Expected answer: Within the last week or two. Impact on approach: Recent timing would focus our investigation on recent changes.

• Considering the breadth, I'm wondering about application types. Are certain types of applications more affected than others?

Why it matters: Helps identify if the issue is universal or specific to certain use cases. Expected answer: Higher impact on high-volume messaging applications. Impact on approach: Would guide us to investigate specific API usage patterns.

• Given the API nature, I'm curious about traffic patterns. Have we seen any unusual spikes in API requests recently?

Why it matters: Could indicate changes in user behavior or potential abuse. Expected answer: Some increase, but not proportional to the rate limit triggers. Impact on approach: Would lead us to investigate both client-side and server-side factors.

• Thinking about system health, I'm wondering about our infrastructure. Have there been any recent changes to our API infrastructure or rate limiting algorithms?

Why it matters: Could point to internal changes as the root cause. Expected answer: Minor updates, but nothing directly related to rate limiting. Impact on approach: Would focus our investigation on unintended consequences of recent changes.