How Livy works with Spark

[Haojin Gui <gu...@gmail.com>]

Hi Livy users,

I am new to Livy and Spark. After reading the docs, I know how I to use
Livy. But I don't understand how Livy works with Spark under the hood. And
I didn't find much information on that topic either. It would be great if
someone can explain that in the context of creating a Livy session and call
APIs to interact with the session.

Thanks,
Haojin