22 November 2022, Apache Lucene™ 9.4.2 available

The Lucene PMC is pleased to announce the release of Apache Lucene 9.4.2

Apache Lucene is a high-performance, full-featured search engine library written entirely in Java. It is a technology suitable for nearly any application that requires structured search, full-text search, faceting, nearest-neighbor search on high-dimensionality vectors, spell correction or query suggestions.

This patch release contains an important fix for a bug affecting version 9.4.1. The release is available for immediate download at:

https://lucene.apache.org/core/downloads.html

Lucene 9.4.2 Release Highlights

Bug fixes

  • Fixed integer overflow when opening segments containing more than ~16M KNN vectors.
  • Fixed cost computation of BitSets created via DocIdSetBuilder, such as for multi-term queries. This may improve performance of multi-term queries.

Enhancements

  • CheckIndex now verifies the consistency of KNN vectors more thoroughly.

Further details of changes are available in the change log available at: https://lucene.apache.org/core/9_4_2/changes/Changes.html.

Please report any feedback to the mailing lists (http://lucene.apache.org/core/discussion.html)

Note: The Apache Software Foundation now uses a content distribution network (CDN) for distributing releases.

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