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Exactly-Once Processing Semantics Across Kafka Consumer Groups : Quorum Fencing Under Partial Network Failure
JavaKafkaPostgreSQLFlink
Problem Breakdown
The core architectural bottleneck is that the system's correctness boundary assumes a clean fail-stop model, but production networks deliver partial failures: some messages arrive, some are delayed, some are duplicated. A stream processor commits its consumer-group offset before its downstream side effect lands (or vic…
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