Consumer Group Rebalance Latency: Unresolved Trade‑Off Between Speed and Offset Commit Safety
Goal Measure the time a Kafka consumer group spends rebalancing before resuming fetches, using the broker JMX metric RebalanceTimeMs , and evaluate how the current configuration limits predictability. Constraints and Uncertainty Rebalance latency grows roughly linearly with the number of partitions when the default range assignor is used. The metric captures
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