Download Apache Lucene 3.2.0

The Apache Software Foundation has released a new version of Lucene, with version number 3.2.0. Lucene can be deployed as part of a search engine. Namely, it can perform full text indexing. This application is written in Java and was previously known as Lucene Java. For more information, please refer to this page. The announcement of this version looks like this:

Lucene Core 3.2

The Lucene PMC is pleased to announce the availability of Apache Lucene 3.2. Lucene can be downloaded from Highlights of the Lucene release include:

• A new grouping module, under lucene/contrib/grouping, enables search results to be grouped by a single-valued indexed field
• A new IndexUpgrader tool fully converts an old index to the current format.
• A new Directory implementation, NRTCachingDirectory, caches small segments in RAM, to reduce the I/O load for applications with fast NRT reopen rates.
• A new Collector implementation, CachingCollector, is able to gather search hits (document IDs and optionally also scores) and then replay them. This is useful for Collectors that require two or more passes to produce results.
• Index a document block using IndexWriter’s new addDocuments or updateDocuments methods. These experimental APIs ensure that the block of documents will forever remain contiguous in the index, enabling interesting future features like grouping and joins.
• A new default merge policy, TieredMergePolicy, which is more efficient due to being able to merge non-contiguous segments. See for details.
• NumericField is now returned correctly when you load a stored document (previously you received a normal Field back, with the numeric value converted string).
• Deleted terms are now applied during flushing to the newly flushed segment, which is more efficient than having to later initialize a reader for that segment.

see CHANGES and contrib CHANGES for details. Binary and source distributions are available here. Maven artifacts are available here.