Big Data Technology & Architecture

Feb 18, 2020 · Big Data

Understanding Flink Event‑Time Windows, Watermarks, and Allowed Lateness with Scala Examples

This article explains how Apache Flink uses event‑time windows, watermarks, and allowed lateness to handle out‑of‑order and late data, and provides complete Scala code examples that demonstrate timestamp assignment, watermark generation, window triggering, and side‑output of late records.