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 4.2.X

You are viewing documentation for an older version (4.2) of Kafka. For up-to-date documentation, see the [latest version](https://kafka.apache.org/43/).

# Configuration

* * *

##### [Broker Configs](/book/reader/apache-kafka-4-2-x/broker-configs)

Broker Configs

##### [Topic Configs](/book/reader/apache-kafka-4-2-x/topic-configs)

Topic Configs

##### [Group Configs](/book/reader/apache-kafka-4-2-x/group-configs)

Group Configs

##### [Producer Configs](/book/reader/apache-kafka-4-2-x/producer-configs)

Producer Configs

##### [Consumer Configs](/book/reader/apache-kafka-4-2-x/consumer-configs)

Consumer Configs

##### [Kafka Connect Configs](/book/reader/apache-kafka-4-2-x/kafka-connect-configs)

Kafka Connect Configs

##### [Kafka Streams Configs](/book/reader/apache-kafka-4-2-x/kafka-streams-configs)

Kafka Streams Configs

##### [Admin Configs](/book/reader/apache-kafka-4-2-x/admin-configs)

Admin Configs

##### [MirrorMaker Configs](/book/reader/apache-kafka-4-2-x/mirrormaker-configs)

MirrorMaker Configs

##### [System Properties](/book/reader/apache-kafka-4-2-x/system-properties)

System Properties

##### [Tiered Storage Configs](/book/reader/apache-kafka-4-2-x/tiered-storage-configs)

Tiered Storage Configs

##### [Configuration Providers](/book/reader/apache-kafka-4-2-x/configuration-providers)

Configuration Providers

Last modified February 16, 2026: [Add 4.2 documentation and javadocs (#785) (956020bebd)](https://github.com/apache/kafka-site//commit/956020bebdb052aacfe7eef1c5421855c78639ee)

Configuration

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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 Configs

Kafka Connect Configs

Kafka Streams Configs

Admin Configs

MirrorMaker Configs

System Properties

Tiered Storage Configs

Configuration Providers

Design

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

Streams Developer Guide

Kafka Streams

Configuration

Configuration

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