Tag: Idempotency

All the articles with the tag "Idempotency".

• External API Calls Inside Transactions — Reproducing Pool Exhaustion and Comparing Simple Split, Saga, and Outbox by Measurement

  2 May, 2026

  I reproduced HikariCP pool exhaustion caused by external API calls inside transactions in a Spring + raw JDBC environment, then compared three remedies — Simple Split, Saga, and Outbox — across 60 workers × 9 chaos scenarios. I caught the moment Simple Split breaks consistency as 60 mismatched records, watched Saga's three-tier safety net trigger in sequence, and saw how Outbox's 72ms ACK and 93-second average completion split the same dataset into opposite conclusions depending on which metric you read.