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/).

# Operations

* * *

##### [Basic Kafka Operations](/book/reader/apache-kafka-4-2-x/basic-kafka-operations)

Basic Kafka Operations

##### [Datacenters](/book/reader/apache-kafka-4-2-x/datacenters)

Datacenters

##### [Geo-Replication (Cross-Cluster Data Mirroring)](/book/reader/apache-kafka-4-2-x/geo-replication-cross-cluster-data-mirroring)

Geo-Replication (Cross-Cluster Data Mirroring)

##### [Multi-Tenancy](/book/reader/apache-kafka-4-2-x/multi-tenancy)

Multi-Tenancy

##### [Java Version](/book/reader/apache-kafka-4-2-x/java-version)

Java Version

##### [Hardware and OS](/book/reader/apache-kafka-4-2-x/hardware-and-os)

Hardware and OS

##### [Monitoring](/book/reader/apache-kafka-4-2-x/monitoring)

Monitoring

##### [KRaft](/book/reader/apache-kafka-4-2-x/kraft)

KRaft

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

Tiered Storage

##### [Consumer Rebalance Protocol](/book/reader/apache-kafka-4-2-x/consumer-rebalance-protocol)

Consumer Rebalance Protocol

##### [Transaction Protocol](/book/reader/apache-kafka-4-2-x/transaction-protocol)

Transaction Protocol

##### [Eligible Leader Replicas](/book/reader/apache-kafka-4-2-x/eligible-leader-replicas)

Eligible Leader Replicas

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

Operations

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Introduction

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Upgrading

KRaft vs ZooKeeper

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Docker

Getting Started

Broker Configs

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Configuration

Design

Protocol

Network Layer

Messages

Message Format

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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

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

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Kafka Connect

Write a streams app

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Upgrade Guide

Writing a Streams Application

Configuring a Streams Application

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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

Operations

Operations

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