Published onAugust 13, 2026The 60-Second Coincidence: Anatomy of a 504 That Was Never the Broker's FaultKafkaIncident-ResponseSpring-BootAWSECSDynamoDBObservabilityA courier taps accept, waits, and gets HTTP 504. Isolating producer vs consumer vs broker, why 60 seconds is a fingerprint, and the DynamoDB putItem pattern that can wipe credentials on a hot path.