beginner~2h
Producer & Consumer Internals
"Call send() " and "annotate a method @KafkaListener " are one-liners. What actually happens between those calls and the broker is where most production Kafka bugs live. This module is the internals layer every later module leans on.
Learning objectives
- Beginner: State what a partition is and why message order is only guaranteed within one, not across a whole topic.
- Intermediate: Explain how a consumer's committed offset differs from what the broker itself tracks per consumer.
- Advanced: Predict how adding more consumer instances than partitions affects a consumer group's actual parallelism.
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Producer & Consumer Internals