Highload • July 26, 2022 • 4 min read
Kafka Consumer Rebalancing — The Details That Bite
How consumer groups actually work, what triggers a rebalance, and the configuration that turns rebalances from outages into smooth handoffs.
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How consumer groups actually work, what triggers a rebalance, and the configuration that turns rebalances from outages into smooth handoffs.
The mental model for Kafka partitions, how ordering works (and doesn't), and the partition-key choices that determine everything downstream.