# apache/nutch

Apache Nutch is an extensible and scalable web crawler

Repository: https://github.com/apache/nutch
Canonical: https://ross.abutalabs.com/products/nutch
Homepage: https://nutch.apache.org/
Language: Java
License: Apache-2.0
License Family: permissive
Topics: java, nutch, web-crawler, crawling, hadoop, apache
Last push: 2026-08-25T05:08:32+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 6314, "days_push": 8, "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 3277, forks 1279 (observed 2026-08-28T04:07:53.493121+00:00)

## What it is
Apache Nutch is a highly extensible and scalable open-source web crawler built on Apache Hadoop data structures. It supports batch crawling of large web volumes with a pluggable architecture for parsing (Tika) and indexing (Solr, Elasticsearch).

## Use cases
- crawl large portions of the web for a search engine index
- batch-scrape millions of pages into Hadoop
- collect and parse web content for downstream data pipelines
- build a custom crawler with pluggable parsing and indexing
- feed documents into Solr or Elasticsearch from web sources

## When to choose
- you need large-scale, Hadoop-based batch crawling
- you want a mature, production-ready crawler with plugin extensibility
- you need fine-grained control over parsing, filtering, scoring, and indexing

## When to avoid
- you need a lightweight single-machine crawler for a few sites
- you need real-time or low-latency crawling
- you want a crawler with built-in authentication for its REST API (the legacy service has none)

## Facets
- artifact type: application
- maturity: stable
- function: web-scraping, parser, search-engine, etl, plugin-system
- domain: crawlers, big-data, developer-tools
- platform: jvm, self-hosted
- tags: web-crawler, hadoop, apache, batch-crawling, tika, solr, elasticsearch, search, linux, docker

## Member repositories
- apache/nutch (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:53.493121+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 2026-08-29T18:43:21.586570+00:00, confidence not recorded.
  - readme: https://github.com/apache/nutch (fetched 2026-08-28T04:07:53.493121+00:00, sha ab4abfe52a6e)
  - homepage: https://nutch.apache.org/ (fetched 2026-08-29T09:36:10.169886+00:00, sha 3b433f1c896f)
  - site_page: https://nutch.apache.org/documentation/security (fetched 2026-08-29T09:36:10.180924+00:00, sha f3d35b2f185f)
  - site_page: https://nutch.apache.org/documentation (fetched 2026-08-29T09:36:10.182886+00:00, sha b6909a976ae2)
- Data as of 2026-08-30T08:39:29.467469+00:00.