Really Nice set of projects. Would have also like to see a starter application with a mini tutorial on how someone can experiment with some of these technologies.
Github references on these projects would also have been useful. Thanks for sharing.
Did you consider Summingbird? Seems like a lot of what you are doing might have been simplified by using Summingbird rather than building separate speed and batch layers in Hadoop / Spark.
That's a great point for our next session - Summingbird would be perfect for everyone trying to implement Lambda Architecture without having to produce separate code for streaming and batch.
Is the code available somewhere ? I'd love to see the one related to fantasy sports