# killme2008/Metamorphosis

A  high available,high performance distributed messaging system.

Repository: https://github.com/killme2008/Metamorphosis
Canonical: https://ross.abutalabs.com/products/metamorphosis
Language: Java
License: Apache-2.0
License Family: permissive
Last push: 2020-04-07T12:11:35+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 5291, "days_push": 2339, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1329, forks 672 (observed 2026-08-28T04:04:23.793535+00:00)

## What it is
Metamorphosis (MetaQ) is a high-availability, high-performance distributed messaging middleware written in Java, originally developed at Taobao and similar to Apache Kafka with various improvements. This is a personal fork published to Maven Central, used in production at companies like JD, Alipay, and Tencent.

## Use cases
- distributed message queue for java services
- high throughput pub-sub messaging
- kafka-like messaging middleware
- decouple microservices with async messaging
- reliable log streaming between systems

## When to choose
- you need a Kafka-like message queue on the JVM with proven production use at large Chinese internet companies
- you want a Java-native alternative to Kafka with simpler operations

## When to avoid
- you need a modern, actively developed project - the latest release is from 2020 and upstream Taobao has moved to MetaQ 2.x/3.x
- you need a large community ecosystem and multi-language client support

## Facets
- artifact type: service
- maturity: maintenance
- function: message-queue, streaming, rpc
- domain: microservices, backend
- platform: jvm, self-hosted
- tags: distributed-messaging, kafka-alternative, metaq, taobao, high-availability, messaging, linux

## Member repositories
- killme2008/Metamorphosis (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:23.793535+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:45:39.802463+00:00, confidence not recorded.
  - readme: https://github.com/killme2008/Metamorphosis (fetched 2026-08-28T04:04:23.793535+00:00, sha d8cda122e310)
- Data as of 2026-08-30T08:39:29.467469+00:00.