Apache Flink 1.19 marks another step forward in stream processing technology with numerous new features and enhancements aimed at enhancing the system's reliability and flexibility, while setting the groundwork for the upcoming Flink 2.0. The release focuses on significant Flink Improvement Proposals (FLIPs) and other contributions, demonstrating how Flink contributes to advancing stream processing and supporting the development of more dynamic, efficient, and user-focused data streaming applications. Key features include improved configuration processes, enhanced support for batch jobs, and advancements in SQL and Table API capabilities. The introduction of dynamic source parallelism inference, async scalar functions, and a built-in Java profiler further improve performance and usability. Additionally, Flink 1.19 introduces beta support for Java 21 and serves as a foundational step toward the release of Flink 2.0.