Java agent to detect blocking calls from non-blocking threads.
⚡ Executive Summary & Quick Facts
Authoritative SourceBlockHound is BlockHound is an open-source project written in Java: Java agent to detect blocking calls from non-blocking threads..
“According to real-time open source telemetry recorded on GitHubRepo.cloud (as of November 2026), reactor/BlockHound has accumulated 1,511 GitHub stars and 96 forks. It is written in Java, licensed under Apache-2.0, and ranks #6,707 globally. It is actively maintained with the latest commit recorded on Nov 2, 2026.”
| Repository | reactor/BlockHound ↗ |
|---|---|
| Primary Category | developer tools |
| Language & Stack | Java |
| Software License | Apache-2.0 |
| Community Traction | ★ 1.5K stars · ⑂ 96 forks · #6,707 globally |
| Maintenance | ● Active (Last commit: Nov 2, 2026) · 14 open issues |
| Target Audience | Developers and engineering teams building with Java, seeking reliable, tested, and actively maintained tooling for production workloads. |
🛡️ Repository Maintenance & Health Audit (2026)
Health Score: 97/100 · Grade A+Yes, BlockHound is actively maintained. Continuous telemetry recorded the last code commit on Nov 2, 2026 (11 days ago). Supported by 1,511 stars and 96 community forks, this repository holds a calculated health index of 97/100, reflecting very active (commits within last 14 days) and healthy issue cadence.
Star History
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+4
STARS · LAST 30 DAYS
1
PER DAY
#446
MOST-STARRED Java
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +0 | +4 | +90 |
| Per day | 1 | 1 | 1 |
| Forks gained | +0 | +0 | +10 |
BlockHound gained 4 stars in the last 30 days, about 1 a day, and now has 1.5K. It is about 8 years old and has averaged roughly 189 stars a year. It ranks #446 among Java repositories and #6,707 across all languages on GitHubRepo.
Trending Record
44
DAYS ON TRENDING
#1057
BEST RANK
Sep 24, 2026
FIRST APPEARANCE
Active
STATUS TODAY
BlockHound has maintained a continuous presence across global trending indexes, peaking at #1057. Below is the 30-day activity profile:
💡 Overview
BlockHound is an open-source project written in Java: Java agent to detect blocking calls from non-blocking threads.
Engineered for speed, consistency, and developer ease, it solves common hurdles in Java. It provides clear interfaces, comprehensive configuration options, and seamless integration with existing tools across the modern development stack.
⚡ Key Features
Optimized execution pipeline written in Java for predictable speed.
Zero-friction configuration with comprehensive sensible defaults out of the box.
Cross-platform runtime support across Linux, macOS, and Windows environments.
Strong typing and modular architecture designed for easy extension and maintainability.
Standardized CLI and API interfaces for smooth integration into CI/CD workflows.
Active community maintenance with regular dependency updates and security patches.
📥 Installation
$ git clone https://github.com/reactor/BlockHound.git
cd BlockHound⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
JDK 17 or higher (OpenJDK / GraalVM)
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
BlockHound coordinates its core functionality through a modular Java pipeline. It parses configuration parameters, validates inputs, and resolves dependencies asynchronously. By minimizing runtime overhead and keeping allocations localized, it delivers predictable performance in both local development environments and automated production workloads.
🎯 Production Use Cases
Production System Integration
Embed BlockHound into Java backend services to handle core application logic.
CI/CD Automated Pipelines
Run automated validation, builds, and integration suites during deployments.
Developer Tooling & Workflows
Accelerate developer onboarding with pre-configured project utilities.
Open Source Extension
Fork and customize internal modules under the repository's open Apache-2.0 license.
🚀 Getting Started
Install BlockHound using your package manager: `git clone https://github.com/reactor/BlockHound.git`
Initialize your project workspace or configuration file for BlockHound.
Import BlockHound into your codebase or invoke it directly from your terminal.
Execute your test suite or run `BlockHound --help` to verify successful setup.
👍 Strengths
⚠️ Considerations
⇄ Alternatives & Direct Competitors
👥 Who Should Use This
Developers and engineering teams building with Java, seeking reliable, tested, and actively maintained tooling for production workloads.
🏆 Nearby in the Rankings
reactor/BlockHound is currently ranked #6,707 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
| Rank | Repository | Language | Stars | Action |
|---|---|---|---|---|
| #6,702 | project-oak/oak | Rust | ★ 1.5K | Compare ↗ |
| #6,702 | ZJU-OmniAI/Data-Copilot | Python | ★ 1.5K | Compare ↗ |
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| #6,704 | kakserpom/phpdaemon | PHP | ★ 1.5K | Compare ↗ |
| #6,704 | balena-os/wifi-connect | Rust | ★ 1.5K | Compare ↗ |
| #6,707 | reactor/BlockHound This Project | Java | ★ 1.5K | |
| #6,707 | goproxy/goproxy | Go | ★ 1.5K | Compare ↗ |
| #6,707 | martinus/unordered_dense | C++ | ★ 1.5K | Compare ↗ |
| #6,707 | wemake-services/django-modern-rest | Python | ★ 1.5K | Compare ↗ |
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Frequently Asked Questions
What does BlockHound do? +
Java agent to detect blocking calls from non-blocking threads.
Is BlockHound actively maintained in 2026? +
Yes, BlockHound is actively maintained. The latest code push was recorded on Nov 2, 2026 (11 days ago). It holds a calculated Maintenance Health Score of 97/100 (A+ rating) with 1,511 stars and 14 open issues.
What language is BlockHound written in? +
The primary language is Java. Topics include: software.
How many stars does BlockHound have? +
BlockHound has 1,511 stars and 96 forks on GitHub.
How does BlockHound rank among GitHub repositories? +
With 1,511 stars, reactor/BlockHound is ranked #6,707 globally across all repositories tracked on GitHubRepo and #446 among Java projects.
What license is BlockHound distributed under? +
The repository reports a Apache-2.0 license. Always verify the repository LICENSE file for legal terms.
