What's causing the sudden spike in API errors for Salesforce Marketing Cloud users in the EMEA region?

Introduction

The sudden spike in API errors for Salesforce Marketing Cloud users in the EMEA region is a critical issue that demands immediate attention. As we delve into this product root cause analysis, we'll follow a systematic approach to identify, validate, and address the underlying factors contributing to this problem. Our goal is not only to resolve the immediate issue but also to implement long-term solutions that prevent similar occurrences in the future.

Step 1

Clarifying Questions (3 minutes)

• Looking at the regional specificity, I'm wondering about infrastructure changes. Have there been any recent updates to our EMEA data centers or CDN providers?

Why it matters: Infrastructure changes could directly impact API performance. Expected answer: Information about recent infrastructure updates or lack thereof. Impact on approach: If confirmed, we'd focus on rollback options or targeted fixes.

• Considering the suddenness of the spike, I'm curious about traffic patterns. Have we seen any unusual spikes in API usage from specific clients or IP ranges in EMEA?

Why it matters: Abnormal traffic could indicate a DDoS attack or a client's misconfigured integration. Expected answer: Data on recent traffic patterns and any anomalies. Impact on approach: High traffic from specific sources would lead us to investigate those clients or potential security threats.

• Thinking about system dependencies, I'm interested in our third-party integrations. Have any of our EMEA-specific API dependencies reported issues or made changes recently?

Why it matters: Third-party issues could be cascading to our systems. Expected answer: Information on the status of our API dependencies. Impact on approach: If confirmed, we'd need to work with the third-party provider or implement temporary workarounds.

• Reflecting on our release cycle, I'm wondering about recent deployments. Have we pushed any updates to our API or related systems in the past 48-72 hours?

Why it matters: Recent changes are often the culprit in sudden performance issues. Expected answer: Details of recent deployments or confirmation of no recent changes. Impact on approach: If a recent deployment is identified, we'd prioritize investigating those changes and potentially rolling back.