KREST-5711 - Non-negative partition id for produce #1136
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The produce API endpoint can be used with or without specifying a partition ID. If a partition ID is specified, it must be non-negative. Before this change, a negative partition ID would result in an exception from the constructor for
ProducerRecordwhich was translated into HTTP 500. But because it's a result of an incorrect request, it should be HTTP 4xx.The change validates that a supplied partition ID is indeed non-negative before going anywhere near Kafka. The HTTP status code for a negative partition ID is 404.