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The New Way of Configuring Grace Periods for Windowed Operations in Kafka Streams

The grace period is a parameter of windowed operations such as Window or Session aggregates, or stream-stream joins. This configuration determines how long after a window ends any new data will still be processed. Events or records arriving after the expiration of the grace period are dropped from such windows. Prior to KIP-633, the default grace period was 24 hours which resulted in an endless stream of unexpected behaviors, problems, confusion and bewilderment for inexperienced users where results would not show up for 24 hours. In this talk, we cover the public API changes to the TimeWindows, SessionWindows, JoinWindows and SlidingWindows as well as the new guidance going forward.

Présentateur

Israel Ekpo

Israel is a Senior Cloud Solutions Architect in the Apps & Data team within Microsoft US One Commercial Partner. Container Orchestration, DevOps, High Performance Computing, Real Time Analytics and Event Processing with Open Source Software are his areas of speciality. In his role at OCP, he guides Microsoft Azure partners and customers developing solutions on the platform to select pragmatic tools, technologies and strategies in the implementation of their solutions.