-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 23 January 2017, Apache Lucene™ 6.4.0 available
The Lucene PMC is pleased to announce the release of Apache Lucene 6.4.0. 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/mirrors-core-latest-redir.html Lucene 6.4.0 Release Highlights: New features * Lucene's best efforts to un-map memory mapped files with "MMapDirectory" now work with the latest Java9 early access builds * A new similarity "BooleanSimilarity" that gives terms a score that is equal to their query boost * The axiomatic family of similarities (6 in total) based on https://www.eecis.udel.edu/~hfang/pubs/sigir05-axiom.pdf * A new token filter "SynonymGraphFilter" that outputs a correct graph structure for multi-token synonyms at query time * Graph token streams, such as those produced by the "SynonymGraphFilter", are now handled accurately by query parsers * A new collector "DocValuesStatsCollector" gives the ability to compute statistics on DocValues field * It is now possible to filter "SortedDocValues" and "SortedSetDocValues" terms enum with a compiled automaton * The "UnifiedHighlighter" can now highlight fields with queries that don't necessarily refer to that field * DrillSideways can now run queries concurrently * Index sorting now supports sorting on multi-valued fields using MIN, MAX, etc. selectors Optimizations * Points do not store the implicit split dimension in the 1-dimension case. This saves between 6% memory for the largest types such an InetAddressPoint to 33% for the smaller types such as HalfFloatPoint. * The BKD in-memory index for dimensional points now uses a compressed format, using substantially less RAM in some cases * The BKD writing now buffers each leaf block in heap before writing to disk, giving a small speedup in points-heavy use cases * "TermAutomatonQuery" now rewrites to more efficient queries when possible Along with numerous bug fixes. Further details of changes are available in the change log available at: http://lucene.apache.org/core/6_4_0/changes/Changes.html Please note, this release cannot be built from source with Java 8 update 121, use an earlier version instead! This is caused by a bug introduced into the Javadocs tool shipped with that update. The workaround was too late for this Lucene release. Of course, you can use the binary artifacts. Please report any feedback to the mailing lists (http://lucene.apache.org/core/discussion.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. Thanks, Jim Ferenczi -----BEGIN PGP SIGNATURE----- Version: Mailvelope v1.6.5 Comment: https://www.mailvelope.com wsFcBAEBCAAQBQJYhcbqCRBwe32fb9uBBQAAbjYP/ia2BFNyDW/kNPscW86L sUgntbbMfbFMEaZnw1nRDDytuDXmCmtnzraA7ivEiPJhx6uNEULWxKVeVYnL lTRsAvtsuybctND17kwdbyFc3KWFg0BikLubOa8a9CbPpLeHY9VH2FaUeLUT 4r7auLgaPZx0TgGXpGLHOCbvZJNABLr5NrkJ9MGlXFFRBHKjPBq1D1kIE8Gi B1PmKuj0hocq9IVmIIf/09BvCUpni64AkME/K8n6739XQKP1wzNTVWQl5Y3j Tn/UdFb0yKKPiHLoK9fj2m1rfCSlfB/9HplNxTlMB8uNnF2Aj78bwjjN7fvZ Ct/yOmTxoYf5BzzrQm4ShA2N23cH9ktks6J/1/9sbz1r5mfJ0xd6Pp+QAqYa cuDnZPlEzUVVZHWDxwkSrnF+3w5UevcA9lrwI6j4igDlGcLwxo5M8vE55onB kWKz6iGyr8xJcEdEx62BJ1h9ylXzo+6TCO3nPE1YqPc2bnpnHmZbx21036iL 8mn8amGMv4fPlOuE9mfR1ILXfMSeO0Gjw/gihv8XEuvDFkyrlxVJg0cCuxmY gH2QrdE/VjE/p+IHZa1VT6MIiQUnrdR3QMz9AUHMc9eAH6qwjJhonQY42f3z BdLMbYk3TKsgUKwS9zapTVLNomQZol+0qjQv2KC0WLiaKBMSCcQHRnyhKXhH A5MP =0mDo -----END PGP SIGNATURE-----
