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🤟 Node.js EventLoop Lag + Kafka Consumer Lag: One Root Cause

The 3-Second Production Mystery That Took Me 20 Days to Solve

This is a story about how we found a 3s EventLoop lag (p99) in one of our microservices while exploring the Kafka consumer lag… and how I tracked it down and fixed.

It’s Feb 6. I notice an increase in Kafka lag in our Grafana chart...

nairihar
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