Apache ZooKeeper

Distributed coordination service

67
Needs attention
Funding
Stable
Maintenance
Moderate
Contributors
Declining
Bus Factor
Low risk
Metrics last updated: 6 days ago (2026-02-07)

Overview

Apache ZooKeeper is a centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services.

Importance

  • Foundation for distributed systems
  • Powers Kafka, HBase, and more
  • Critical for coordination
  • Still widely used

Key Features

  • Configuration management
  • Naming service
  • Distributed locks
  • Leader election

Sustainability

ZooKeeper is an Apache Foundation project but has seen reduced activity as newer solutions emerge.

Dependencies

⬆️ Depends On (2)
OpenSSL 96
Linux Kernel 88
Apache ZooKeeper
unknown
⬇️ Used By (1)
Apache Kafka 88

Dependency Chain

Upstream
OpenSSL → Linux Kernel →
Apache ZooKeeper
→ Apache Kafka
Downstream

Impact Analysis

2 Direct Dependencies
1 Dependent Projects
🔗 Middleware project

⚠️ Impact Risk: Changes to Apache ZooKeeper could affect 1 downstream project.

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