Apache Kafka is an open-source distributed event streaming platform used by thousands of companies for high-performance data pipelines, streaming analytics, data integration, and mission-critical applications.

Apache Kafka 4.3.X

# Design

* * *

##### [Design](/book/reader/apache-kafka-4-3-x/design-design)

##### [Protocol](/book/reader/apache-kafka-4-3-x/protocol)

Last modified May 22, 2026: [MINOR: Add 4.3 docs and javadoc (#853) (dde051e342)](https://github.com/apache/kafka-site//commit/dde051e342850dadc1aefef27899a50c1a6fc3e9)

Design

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Introduction

Use Cases

Quick Start

Ecosystem

Upgrading

KRaft vs ZooKeeper

Compatibility

Docker

Getting Started

Broker Configs

Topic Configs

Group Configs

Producer Configs

Consumer and Share Consumer Configs

Kafka Connect Configs

Kafka Streams Configs

Admin Configs

MirrorMaker Configs

System Properties

Tiered Storage Configs

Configuration Providers

Configuration

Protocol

Network Layer

Messages

Message Format

Distribution

Implementation

Basic Kafka Operations

Datacenters

Geo-Replication (Cross-Cluster Data Mirroring)

Multi-Tenancy

Java Version

Hardware and OS

Monitoring

KRaft

Tiered Storage

Consumer Rebalance Protocol

Transaction Protocol

Eligible Leader Replicas

Operations

Security Overview

Listener Configuration

Encryption and Authentication using SSL

Authentication using SASL

Authorization and ACLs

Incorporating Security Features in a Running Cluster

Security

Overview

User Guide

Connector Development Guide

Administration

Kafka Connect

Write a streams app

Core Concepts

Architecture

Upgrade Guide

Writing a Streams Application

Configuring a Streams Application

Streams DSL

Processor API

Naming Operators in a Streams DSL application

Data Types and Serialization

Testing a Streams Application

Interactive Queries

Memory Management

Running Streams Applications

Managing Streams Application Topics

Streams Security

Application Reset Tool

Streams Rebalance Protocol

Kafka Streams Groups Tool

Migrating from Streams Scala to Java API

Streams Developer Guide

Kafka Streams

Design

Design

Design

Protocol

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