24 September 2018, Apache Lucene™ 7.5.0 available

The Lucene PMC is pleased to announce the release of Apache Lucene 7.5.0.

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: http://lucene.apache.org/core/downloads.html Please read CHANGES.txt for a full list of new features and changes:

https://lucene.apache.org/core/7_5_0/changes/Changes.html

Lucene 7.5.0 Release Highlights:

Bug Fixes

• IndexWriter#deleteDocs(Query... query) applies deletes to wrong documents if the index is sorted.
  

Changes in Runtime behavior

• TieredMergePolicy now respects maxSegmentSizeMB by default when executing findForcedMerges and findForcedDeletesMerges.
  

Improvements

• A new points based Shape Indexing and Searching that decomposes shapes into a triangular mesh and indexes individual triangles as a 6 dimension point.
• A new ByteBuffer based Directory implementation that aims to replace the deprecated RAMDirectory.
• The UnifiedHighlighter can now use the MatchesIterator API to highlight any query more accurately.
• TopFieldComparator can now stop comparing documents if the index is sorted, even if hits still need to be visited to compute the hit count.
• TieredMergePolicy can control how aggressively deletes should be reclaimed with the new deletesPctAllowed setting.
  

Further details of changes are available in the change log available at: http://lucene.apache.org/core/7_5_0/changes/Changes.html

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

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