rmoff, 
Just another day on the #ApacheFlink user mailing list 🙃
👉For better or worse, understanding JARs is an unavoidable first step to using Flink if you're running it yourself.
👇 That's why I wrote about it a lot 😁
1️⃣ https://www.decodable.co/blog/flink-sql-and-the-joy-of-jars
2️⃣ https://www.decodable.co/blog/flink-sql-misconfiguration-misunderstanding-and-mishaps