[ANNOUNCE] Apache Lucene 9.12.0 released

The Lucene PMC is pleased to announce the release of Apache Lucene 9.12.0.

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 across high-dimensionality vectors, spell correction or query suggestions.

This release contains numerous bug fixes, optimizations, and improvements, some of which are highlighted below. The release is available for immediate download at:

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

Lucene 9.12.0 Release Highlights:

Security Fixes
    • Deserialization of Untrusted Data vulnerability in Apache Lucene Replicator - CVE-2024-45772 

New Features
    • Improve intra-merge parallelism for many value types.
    • Add support JDK 23 to the Panama Vectorization Provider.

Improvements
    • Add Intervals.regexp and Intervals.range methods to produce IntervalsSource for regexp and range queries. 
    • Remove support for writing 8 bit scalar vector quantization. 4 and 7 bit quantization are still supported

Optimizations
    • Inline postings skip data to improve performance of queries that need skipping such as conjunctions. 
    • Optimizations to the decoding logic of blocks of postings. 
    • Avoid performance degradation with closing shared mapped segment data

... plus a multitude of helpful bug fixes!

Please read CHANGES.txt for a full list of new features and changes:
https://lucene.apache.org/core/9_12_0/changes/Changes.html

-Chris.