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- future release Kafka 2.3:
- KIP-149: Enabling key access in ValueTransformer, ValueMapper, and ValueJoiner (partially implemented in v1.1)
- KIP-150 - Kafka-Streams Cogroup
- KIP-258: Allow to Store Record Timestamps in RocksDB
- KIP-300: Add Windowed KTable API in StreamsBuilder
- KIP-307: Allow to define custom processor names with KStreams DSL
- KIP-313: Add KStream.flatTransform and KStream.flatTransformValues (partially implemented in v2.2)
- KIP-328: Ability to suppress updates for KTables (partially implemented in v2.1)
- KIP-428: Add in-memory window store
- upcoming release Kafka 2.2:
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- KIP-159: Introducing Rich functions to Streams
- KIP-213 Support non-key joining in KTable
- KIP-216: IQ should throw different exceptions for different errors
- KIP-228 Negative record timestamp support
- KIP-300: Add Windowed KTable API in StreamsBuilder
- KIP-307: Allow to define custom processor names with KStreams DSL
- KIP-314: KTable to GlobalKTable Bi-directional Join
KIP-378: Enable Dependency Injection for Kafka Streams handlers
KIP-399: Extend ProductionExceptionHandler to cover serialization exceptions
KIP-406: GlobalStreamThread should honor custom reset policy
- KIP-418: A method-chaining way to branch KStream
- KIP-422: [Streams] Support multiple topic resolution in TopicNameExtractor
- KIP-424: Allow suppression of intermediate events based on wall clock timeKIP-428: Add in-memory window store
Inactive (feel free to pick up):
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