Table of Contents
Kafka
hard dedup/exacly once
Flink
According this :
Starting with Flink 1.4.0, both the Pravega and Kafka 0.11 producers provide exactly-once semantics; Kafka introduced transactions for the first time in Kafka 0.11, which is what made the Kafka exactly-once producer possible in Flink.
it means: that only from Kafka 0.11 and Flink 1.4.0 and Pravega - Exactly once supported