[GSoC 2026] Kafka Streams runner — GroupByKey (GlobalWindow, fire at watermark)#39141

Merged

je-ik merged 4 commits into

apache:feat/18479-kafka-streams-runner-skeletonfrom

junaiddshaukat:feat/ks-group-by-key

Jun 30, 2026

Commits on Jun 28, 2026

Add GroupByKey (GlobalWindow, fire at watermark)
junaiddshaukat
committed

Commits on Jun 29, 2026

Address review: emit GroupByKey output at the global window's end
junaiddshaukat
committed
Document GroupByKey scope: restart resilience and large-key-space limits
junaiddshaukat
committed

Commits on Jun 30, 2026

Rename GroupByKeyRekeyProcessor to ShuffleByKeyProcessor
junaiddshaukat
committed