15 July 2020, Apache Lucene™ 8.6.0 available

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:


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.
    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

Further details of changes are available in the change log available at: http://lucene.apache.org/core/8_6_0/changes/Changes.html

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

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