From Kafka Streams in Action by Bill Bejeck
This article discusses KSQL, a brand-new open source, Apache 2.0 streaming SQL engine that enables stream processing with Kafka. Basically, it makes it easy to read, write, and process streaming data in real-time, at scale, using SQL-like semantics.
From Streaming Data by Andrew G. Psaltis
This article deals with cases where processing a message exactly once is important and how one can work around the related challenges.
Andrew G. Psaltis, author of Streaming Data, explains the concept of the Request/Response pattern and how you can collect data using it.