kafka增加partition

kafka-stream-topic-test

kafka-stream-test: partitions assigned: [kafka-stream-topic-test-0, kafka-stream-topic-test-1, kafka-stream-topic-test-2, kafka-stream-topic-test-3, kafka-stream-topic-test-4]

可以看到生成3万条数据时使用5个分区的自动负载：