Any concept.
clear in 60 seconds.

Kafka uses retries and Dead Letter Queues to manage message processing failures.

Kafka can help ensure messages are processed once, but requires careful design.

Kafka consumers can use multiple threads to speed up message processing, but it complicates ordering and offset management.

Kafka allows safe message reprocessing by resetting consumer positions without altering data.

Classifying failures and using controlled retries in Kafka prevents outages.

Kafka's parallel processing depends on partitions, not just consumers or threads.

Kafka consumers can fetch data in batches to improve throughput and reduce latency.

Kafka consumer lag shows how far behind consumers are from new messages.