[Exercise] Tracking the Most Popular Hashtags Back to: Streaming Big Data with Spark Streaming, Scala, and Spark 3! Previous Lesson [Exercise] Tracking the Average Tweet Length Lesson 2 within section Spark Streaming Examples with Twitter. You must enroll in this course to access course content. Next Lesson [Exercise] Tracking the Top URL’s Requested Lesson 1 within section Spark Streaming Examples with Clickstream / Apache Access Log Data. You must enroll in this course to access course content.