{"id":632,"date":"2014-04-28T15:18:37","date_gmt":"2014-04-28T13:18:37","guid":{"rendered":"http:\/\/sematext.solr.pl\/?p=632"},"modified":"2020-11-12T15:19:03","modified_gmt":"2020-11-12T14:19:03","slug":"lucene-and-solr-4-8","status":"publish","type":"post","link":"https:\/\/solr.pl\/en\/2014\/04\/28\/lucene-and-solr-4-8\/","title":{"rendered":"Lucene and Solr 4.8"},"content":{"rendered":"<p>Today Apache Lucene and Solr PMC announced another version of Apache Lucene library and Apache Solr search server numbered <strong>4.8<\/strong>. This is a next release continuing the 4th version of both Apache Lucene and Apache Solr. This is also the first version of Lucene that requires <strong>JDK 7<\/strong>.<\/p>\n\n\n<!--more-->\n\n\n<p>Here are some of the changes that were made comparing to the 4.7.2:<\/p>\n<h3>Lucene<\/h3>\n<ul>\n<li>First version of Lucene requiring JDK 1.7<\/li>\n<li>New index format stores checksums for each file and can check them during merges<\/li>\n<li>HunspellStemFilter uses 10 to 100x less memory and can open OpenOffice dictionaries without errors<\/li>\n<li>Rescorer API was added to allow recalculating score for documents using more complicated functions<\/li>\n<li>NativeFSLockFactory bug was fixed that allowed multiple <em>IndexWriter<\/em> instances obtain a lock<\/li>\n<li>Multiple bug fixes and improvements since Lucene 4.7.2<\/li>\n<\/ul>\n<h3>Solr<\/h3>\n<ul>\n<li>Expand component was introduced &#8211; it allows to expand collapsing and block-join relationships<\/li>\n<li>Added<em> ADDREPLICA<\/em> command to CollectionsAPI to allow easy replica creation<\/li>\n<li>Complex phrase queries were added to Solr<\/li>\n<li><em>&lt;fields&gt;<\/em> and <em>&lt;types&gt;<\/em> tags in <em>schema.xml<\/em> are not mandatory anymore<\/li>\n<li>REST API was added for synonyms and stopwords<\/li>\n<li>Optimizations and bugfixes from Lucene 4.8<\/li>\n<\/ul>\n<p>Full changes list for Lucene can be found at <a href=\"http:\/\/wiki.apache.org\/lucene-java\/ReleaseNote48\">http:\/\/wiki.apache.org\/lucene-java\/ReleaseNote48<\/a>. Full list of changes in Solr 4.8 can be found at: <a href=\"http:\/\/wiki.apache.org\/solr\/ReleaseNote48\">http:\/\/wiki.apache.org\/solr\/ReleaseNote48<\/a>.<\/p>\n<p>Apache Lucene <strong>4.8<\/strong> library can be downloaded from the following address: <a href=\"http:\/\/www.apache.org\/dyn\/closer.cgi\/lucene\/java\/\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/www.apache.org\/dyn\/closer.cgi\/lucene\/java\/<\/a>. Apache Solr <strong>4.8<\/strong> can be downloaded at the following URL address: <a href=\"http:\/\/www.apache.org\/dyn\/closer.cgi\/lucene\/solr\/\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/www.apache.org\/dyn\/closer.cgi\/lucene\/solr\/<\/a>. Please remember that the mirrors are just starting to update so not all of them will contain the <strong>4.8<\/strong> version of Lucene and Solr.<\/p>","protected":false},"excerpt":{"rendered":"<p>Today Apache Lucene and Solr PMC announced another version of Apache Lucene library and Apache Solr search server numbered 4.8. This is a next release continuing the 4th version of both Apache Lucene and Apache Solr. This is also the<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[26,27],"tags":[162,257,164],"class_list":["post-632","post","type-post","status-publish","format-standard","hentry","category-lucene-en","category-solr-en","tag-lucene-2","tag-release-2","tag-solr-2"],"_links":{"self":[{"href":"https:\/\/solr.pl\/en\/wp-json\/wp\/v2\/posts\/632","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/solr.pl\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/solr.pl\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/solr.pl\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/solr.pl\/en\/wp-json\/wp\/v2\/comments?post=632"}],"version-history":[{"count":1,"href":"https:\/\/solr.pl\/en\/wp-json\/wp\/v2\/posts\/632\/revisions"}],"predecessor-version":[{"id":633,"href":"https:\/\/solr.pl\/en\/wp-json\/wp\/v2\/posts\/632\/revisions\/633"}],"wp:attachment":[{"href":"https:\/\/solr.pl\/en\/wp-json\/wp\/v2\/media?parent=632"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/solr.pl\/en\/wp-json\/wp\/v2\/categories?post=632"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/solr.pl\/en\/wp-json\/wp\/v2\/tags?post=632"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}