Top 23 Java Distributed System Projects

Distributed Systems

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1. advanced-java

   1 1 77,469 5.6 Java

   😮 Core Interview Questions & Answers For Experienced Java(Backend) Developers | 互联网 Java 工程师进阶知识完全扫盲：涵盖高并发、分布式、高可用、微服务、海量数据处理等领域知识

   

2. InfluxDB

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   InfluxDB high-performance time series database. Collect, organize, and act on massive volumes of high-resolution data to power real-time intelligent systems.

   

3. Dubbo

   2 3 40,904 9.8 Java

   The java implementation of Apache Dubbo. An RPC and microservice framework.

   

   Project mention: Dirty code: trusted keeper of errors. Broken windows theory | dev.to | 2025-03-17

   Let's look at the example from Apache Dubbo:

4. awesome-system-design-resources

   3 3 22,308 8.4 Java

   Learn System Design concepts and prepare for interviews using free resources.

   

   Project mention: 🔥 17 Best Free GitHub Repositories to Crack System Design Interviews 🛠️ | dev.to | 2024-12-06

   11. Awesome System Design Resources

5. conductor

   4 11 20,409 9.5 Java

   Conductor is an event driven orchestration platform providing durable and highly resilient execution engine for your applications

   

   Project mention: Netflix has open-sourced its Maestro Workflow Orchestrator | news.ycombinator.com | 2024-07-22

   I'm a bit confused about what is going on here: This project appears to use Netflix/conductor [0]. But you go to that repo, you see it has been archived, with a message saying it is replaced by Netflix's internal non-OSS version, and by unmentioned community forks – by which I assume they mean Orkes Conductor [1]. But this isn't using Orkes Conductor, it looks like it is using the discontinued Netflix version `com.netflix.conductor:conductor-core:2.31.5` [2] – and an outdated version of it too.

   [0] https://github.com/Netflix/conductor

   [1] https://github.com/conductor-oss/conductor

   [2] https://github.com/Netflix/maestro/blob/e8bee3f1625d3f31d84d...

6. Apache ZooKeeper

   5 40 12,451 8.4 Java

   Apache ZooKeeper

   

   Project mention: Mastering Apache Kafka: Powering Modern Data Pipelines | dev.to | 2025-01-16

   Zookeeper is a distributed coordination service used in older versions of Kafka to manage cluster metadata, leader election, and configuration. It ensures consistency and synchronization across Kafka brokers.

7. Trino

   6 50 11,124 10.0 Java

   Official repository of Trino, the distributed SQL query engine for big data, former

   

   Project mention: Twitter's 600-Tweet Daily Limit Crisis: Soaring GCP Costs and the Open Source Fix Elon Musk Ignored | dev.to | 2025-04-10

   Trino: Trino (formerly known as PrestoSQL) is a high-performance distributed SQL query engine designed for data analysis. It offers efficient querying capabilities across multiple data sources, including various file formats, databases, and data lakes. These are some interesting background story between Trino and Presto: Presto was the original name of the project, and it was developed by Facebook. In December 2020, a significant portion of the Presto community decided to fork the project and renamed it Trino. Read more here: Trino Blog.

8. Hazelcast

   7 7 6,298 9.9 Java

   Hazelcast is a unified real-time data platform combining stream processing with a fast data store, allowing customers to act instantly on data-in-motion for real-time insights.

   

9. CodeRabbit

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10. bookkeeper

    8 3 1,922 9.0 Java

    Apache BookKeeper - a scalable, fault tolerant and low latency storage service optimized for append-only workloads

    

11. dslabs

    9 18 1,384 5.7 Java

    Distributed Systems Labs and Framework

    

    Project mention: Smurf: Beyond the Test Pyramid | news.ycombinator.com | 2024-10-19

    You'd define invariants that must be met. This has been done before.

    https://en.wikipedia.org/wiki/Search-based_software_engineer...

    e.g. testing implementations of Paxos: https://github.com/emichael/dslabs

12. py4j

    10 3 1,228 4.8 Java

    Py4J enables Python programs to dynamically access arbitrary Java objects

    

    Project mention: Py4J: Enables Python programs to dynamically access arbitrary Java objects | news.ycombinator.com | 2025-04-12

13. ScaleCube

    11 0 622 8.3 Java

    Microservices library - scalecube-services is a high throughput, low latency reactive microservices library built to scale. It features: API-Gateways, service-discovery, service-load-balancing, the architecture supports plug-and-play service communication modules and features. built to provide performance and low-latency real-time stream-processing

    

14. scalardb

    12 1 510 9.2 Java

    Universal HTAP Engine

    

15. swim

    13 1 493 4.9 Java

    Full stack application platform for building stateful microservices, streaming APIs, and real-time UIs

    

16. Sparkler

    14 0 412 3.0 Java

    Spark-Crawler: Apache Nutch-like crawler that runs on Apache Spark.

    

17. kronotop

    15 2 248 8.9 Java

    Kronotop is a distributed and transactional document database backed by FoundationDB.

    

    Project mention: Kronotop: Redis-compatible, transactional document store backed by FoundationDB | news.ycombinator.com | 2025-01-20

18. MicroRaft

    16 2 232 4.6 Java

    Feature-complete implementation of the Raft consensus algorithm in Java

    

19. pegasus

    17 1 189 9.7 Java

    Pegasus Workflow Management System - Automate, recover, and debug scientific computations. (by pegasus-isi)

    

    Project mention: Pegasus Workflow Management System | news.ycombinator.com | 2024-06-05

20. diztl

    18 1 177 0.0 Java

    Share, discover & download files in your network 💥

    

21. nosqlbench

    19 4 176 9.5 Java

    The open source, pluggable, nosql benchmarking suite.

    

22. memq

    20 2 136 6.3 Java

    MemQ is an efficient, scalable cloud native PubSub system

    

23. kafka-delayed-queue

    21 1 39 2.6 Java

    Delayed Queue implementation over Kafka

    

    Project mention: Show HN: Delayed Queue Using Kafka | news.ycombinator.com | 2024-07-08

24. Vector-Clock

    22 3 11 4.2 Java

    An implementation of Vector Clock in Java :alarm_clock: (by varunu28)

    

25. kafka-workflow

    23 3 9 2.5 Java

    Simple Workflow As Code on Kafka

    

26. SaaSHub

    www.saashub.com featured

    SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

    

Java Distributed Systems related posts

• Py4J: Enables Python programs to dynamically access arbitrary Java objects

  1 project | news.ycombinator.com | 12 Apr 2025

• System Design Resources

  1 project | news.ycombinator.com | 18 Sep 2024

• Dubbo: A Robust Java RPC and Microservice Framework

  1 project | news.ycombinator.com | 8 Aug 2024

• Maestro: Netflix's Workflow Orchestrator

  9 projects | news.ycombinator.com | 22 Jul 2024

• Conductor – open-source event driven orchestration platform

  1 project | news.ycombinator.com | 4 Jul 2024

• RAG Explained | Using Retrieval-Augmented Generation to Build Semantic Search

  1 project | dev.to | 13 Jun 2024

• Emerging Tech Trends 2024: The Latest Developments in AI, API, and Automation

  1 project | dev.to | 17 May 2024
• A note from our sponsor - CodeRabbit
  coderabbit.ai | 19 Apr 2025

  Revolutionize your code reviews with AI. CodeRabbit offers PR summaries, code walkthroughs, 1-click suggestions, and AST-based analysis. Boost productivity and code quality across all major languages with each PR. Learn more →

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