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Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas

Apache Hadoop

Alluxio, data orchestration for analytics and machine learning in the cloud

Generate Java types from JSON or JSON Schema and annotate those types for data-binding with Jackson, Gson, etc

Apache Calcite

H2 is an embeddable RDBMS written in Java.

A production-grade java implementation of RAFT consensus algorithm.

The Data Transfer Project makes it easy for platforms to build interoperable user data portability features. We are establishing a common framework, including data models and protocols, to enable d…

Collect, aggregate, and visualize a data ecosystem's metadata

Smiley's HTTP Proxy implemented as a Java servlet

Open source Java implementation for Raft consensus protocol.

First open-source data discovery and observability platform. We make a life for data practitioners easy so you can focus on your business.

Facebook's Realtime Distributed FS based on Apache Hadoop 0.20-append

Egeria core

Tapdata Live Data Platform Project

Hops Hadoop is a distribution of Apache Hadoop with distributed metadata.

sql-to-mongo-db-query-converter

A tool for scale and performance testing of HDFS with a specific focus on the NameNode.