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To prevent message loss upon RabbitMQ broker restarts, set the queue as durable and ensure published messages use delivery_mode=2 (persistent). This dual configuration guarantees message survival across failures.
Use JetStream streams with file-backed storage and durable, acked consumers to get at-least-once delivery in NATS. This guide shows server config, stream and consumer creation, and how to verify persistence without losing messages on restart.
JetStream adds persistence to NATS, but choosing the right consumer model is key for reliable delivery. This blog explains how to use pull consumers with proper AckWait settings, provides a concrete example, and discusses trade‑offs like disk I/O and batch size.
Stop losing messages during subscriber downtime. Learn how to implement NATS JetStream durable consumers for guaranteed delivery and state persistence.
rabbitmq
nats