kafka is mainly used for log collection, which can collect user traffic and click behavior. The current version of kafka is 1.0, and its version 0.9 has many pits. It is recommended that you use version 0.8.2.1, which is the kafka version integrated with spark1.6.2
You can go to Elephant Online to share and see the spark video of teacher Nightcrawler
http://www.itjoin.org/course/detail/57aa8938b52a8f0ddbd81763