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Exactly-Once Processing Semantics Across Kafka Consumer Groups : Observability Blind Spots During Incidents
JavaKafkaPostgreSQLFlink
Problem Breakdown
The systemic weakness is that observability is built for the happy path: metrics, traces, and logs are wired up under normal conditions, then discovered to be insufficient exactly when an incident starts. A stream processor commits its consumer-group offset before its downstream side effect lands (or vice versa), so a…
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