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From Ignacio Vera <>
Subject [ANNOUNCE] Apache Lucene 8.2.0 released
Date Fri, 26 Jul 2019 07:48:19 GMT
## 26 July 2019, Apache Luceneā„¢ 8.2.0 available

The Lucene PMC is pleased to announce the release of Apache Lucene 8.2.0.

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 8.2.0 Release Highlights:

#### API Changes:

  * Intervals queries has been moved from the sandbox to the queries module.

#### New Features

  * New XYShape Field and Queries for indexing and querying general
cartesian geometries.

  * Snowball stemmer/analyzer for the Estonian language.

  * Provide a FeatureSortfield to allow sorting search hits by descending
value of a feature.

  * Add new KoreanNumberFilter that can change Hangul character to number
and process decimal point.

  * Add doc-value support to range fields.

  * Add monitor subproject (previously Luwak monitoring library) that
allows a stream of documents to be matched against a set of registered
queriesin an efficient manner.

  * Add a numeric range query in sandbox that takes advantage of index
sorting.Add a numeric range query in sandbox that takes advantage of index

#### Optimizations

  * Use exponential search instead of binary search in
IntArrayDocIdSet#advance method.

  * Use incoming thread for execution if IndexSearcher has an executor. Now
caller threads execute at least one search on an index even if there is an
executor provided to minimize thread context switching.

  * New storing strategy for BKD tree leaves with low cardinality that can
lower storage costs and It can be used at search time to speed up queries.

  * Load frequencies lazily only when needed in BlockDocsEnum and

  * Phrase queries now leverage impacts.

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


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

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

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

This also applies to Maven access.

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