The Lucene PMC is pleased to announce the release of Apache Lucene 8.6.0.

Apache Lucene is a high-performance, full-featured text search engine
library written entirely in Java. It is a technology suitable for nearly
any application that requires full-text search, especially cross-platform.


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 8.6.0 Release Highlights:


 * API change in: SimpleFSDirectory, IndexWriterConfig, MergeScheduler,
SortFields, SimpleBindings, QueryVisitor, DocValues, CodecUtil.

 * New: IndexWriter merge-on-commit feature to selectively merge small
segments on commit, subject to a configurable timeout, to improve search
performance by reducing the number of small segments for searching.

 * New: Grouping by range based on DoubleValueSource and LongValueSource.

 * Optimizations: BKD trees and index, DoubleValuesSource/QueryValueSource,
UsageTrackingQueryingCachingPolicy, FST, Geometry queries, Points,
UniformSplit.

 * Others: Ukrainian analyzer, checksums verification, resource leaks fixes.


Please read CHANGES.txt for a full list of new features and changes:


  <https://lucene.apache.org/core/8_6_0/changes/Changes.html>


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This also applies to Maven access.

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