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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-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)
- upcoming release Kafka 2.2:
KIP-258: Allow to Store Record Timestamps in RocksDB
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