[ANNOUNCE] Apache Lucene 8.6.0 released

[Bruno Roustant <br...@apache.org>]

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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>


Note: The Apache Software Foundation uses an extensive mirroring network for

distributing releases. It is possible that the mirror you are using may not
have

replicated the release yet. If that is the case, please try another mirror.

This also applies to Maven access.

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