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Message Delivery

10 articles · Page 1 of 1
Cloud Architecture
Cloud Architecture
Aug 27, 2026 · Backend Development

Reliable Delivery for Billion-Scale LongConn Gateways: Tackling ACK Storms

The article explains why a successful Netty write does not guarantee message delivery, and presents a production‑grade solution for billion‑scale long‑connection gateways that combines application‑level ACKs, timeout‑driven retries, offline compensation, state‑machine design, back‑pressure handling, and observability to prevent ACK storms and retry avalanches.

ACK StormKafkaMessage Delivery
0 likes · 29 min read
Reliable Delivery for Billion-Scale LongConn Gateways: Tackling ACK Storms
Architect's Guide
Architect's Guide
Dec 12, 2023 · Backend Development

Understanding Kafka Consumer: Delivery Guarantees, Rebalance Mechanisms, Partition Assignment, and Thread Safety

This article provides a comprehensive guide to KafkaConsumer, covering message delivery semantics (at‑most‑once, at‑least‑once, exactly‑once), practical exactly‑once implementations, consumer rebalance triggers and strategies, partition assignment algorithms, thread‑safety considerations, and detailed Java code examples of the consumer workflow.

ConsumerJavaKafka
0 likes · 14 min read
Understanding Kafka Consumer: Delivery Guarantees, Rebalance Mechanisms, Partition Assignment, and Thread Safety
YunZhu Net Technology Team
YunZhu Net Technology Team
Nov 18, 2021 · Backend Development

Unified Messaging Center (UMC) Overview: Channels, Features, and Application Scenarios

The article introduces the Unified Messaging Center (UMC), a comprehensive enterprise message management system that supports multiple channels such as app push, TPNS, SMS, email, WeChat, and DingTalk, detailing each channel's features, usage scenarios, and integration considerations.

Backend IntegrationMessage DeliveryUnified Messaging
0 likes · 15 min read
Unified Messaging Center (UMC) Overview: Channels, Features, and Application Scenarios
Meituan Technology Team
Meituan Technology Team
Jul 22, 2021 · Backend Development

Pike 2.0: Meituan's Bidirectional Message Delivery Service Architecture and Features

Meituan’s Pike 2.0 replaces the Shark‑dependent Pike 1.0 with a four‑layer, TunnelKit‑based bidirectional messaging service that offers shared or independent channels, heartbeat‑driven keep‑alive, aggregated high‑QPS delivery, ordering guarantees, extensive monitoring, and plans for IoT and QUIC enhancements, achieving over 5 billion daily messages with sub‑220 ms latency.

MeituanMessage DeliveryPike 2.0
0 likes · 28 min read
Pike 2.0: Meituan's Bidirectional Message Delivery Service Architecture and Features
Architecture Digest
Architecture Digest
Jan 7, 2020 · Backend Development

Ensuring 100% Message Delivery with RabbitMQ: Reliability Steps and Idempotent Design

This article explains how to achieve guaranteed 100% message delivery in RabbitMQ by leveraging its acknowledgment mechanisms, implementing producer‑side confirmation steps, designing compensation and retry logic, and ensuring consumer‑side idempotency through unique identifiers and various ID‑generation strategies.

Message Deliverydistributed systemsidempotency
0 likes · 7 min read
Ensuring 100% Message Delivery with RabbitMQ: Reliability Steps and Idempotent Design
21CTO
21CTO
Sep 5, 2018 · Fundamentals

Why Exactly‑Once Delivery Is Impossible: Understanding Message Delivery Semantics

The article explains how messages travel in monolithic and distributed systems, why network communication is inherently unreliable, and how different delivery semantics—at‑most‑once, at‑least‑once, and exactly‑once—affect reliability, ordering, and protocol choices such as AMQP and MQTT.

At-Least-OnceExactly-OnceMessage Delivery
0 likes · 14 min read
Why Exactly‑Once Delivery Is Impossible: Understanding Message Delivery Semantics