So You Want To Monitor Kafka…

Ben Summer reviews a Kafka catstrophe and explains how to avoid it:

Here at New Relic, the Edge team is responsible for the pipelines that handle all the data coming into our company. We were an early adopter of Apache Kafka, which we began using to power this data pipeline. Our initial results were outstanding. Our cluster handled any amount of data we threw at it; it showed incredible fault tolerance and scaled horizontally. Our implementation was so stable for so long that we basically forgot about it. Which is to say, we totally neglected it. And then one day we experienced a catastrophic incident.

Our main cluster seized up. All graphs, charts, and dashboards went blank. Suddenly we were totally in the dark — and so were our customers. The incident lasted almost four hours, and in the end, an unsatisfactory number of customers experienced some kind of data loss. It was an epic disaster. Our Kafka infrastructure had been running like a champ for more than a year and suddenly it had ground to a halt.

This happened several years ago, but to this day we still refer to the incident as the “Kafkapocalypse.”

Ben has a couple interesting stories and some good rules of thumb for maintaining a Kafka cluster.

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