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Kafka >> mail # user >> Multiple partitions per thread behavior

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Multiple partitions per thread behavior
Hey gang, quick consumer behavior question:

If I have a Consumer that owns several partitions but only creates a single stream for them, in what order will that stream get its messages? From my experiments it seems like the Consumer fetches some amount of messages for all N partitions it holds, and then processes all the messages for Stream 1, then Stream 2, etc. until it has run out of messages, then fetches more. Is that accurate?