KIP-1161 — Unifying LIST-Type Configuration Validation and Default Values

Accepted Kafka 4.2 AdminClient

Standardizes LIST-type configuration validation across Kafka to disallow empty lists and duplicate values in configs where such inputs cause misconfiguration or silent semantic redundancy. Previously, LIST-type configs accepted empty or null values without error and allowed duplicates without warning, misleading operators who expected validation at configuration load time.

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