Message Redelivery in Apache Pulsar - Understanding Semantics and Best Practices

Learn about Apache Pulsar's message redelivery semantics and control mechanisms in this conference talk from Pulsar Summit SF 2022. Explore how message acknowledgments provide at-least-once or exactly-once processing guarantees, and understand the challenges that arise when acknowledgments fail to arrive. Discover the implications of message resending, including potential duplicate processing and out-of-order delivery risks. Gain practical insights into the various control mechanisms available to application developers for managing redelivery behavior, and master best practices for configuring message redelivery across different use cases. Delve into the critical aspects of message transmission between brokers, producers, and consumers in Apache Pulsar's ecosystem.