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<h1>Welcome to Solr</h1>
<div id="minitoc-area">
<ul class="minitoc">
<li>
<a href="#intro">What Is Solr?</a>
</li>
<li>
<a href="#getstarted">Get Started</a>
</li>
<li>
<a href="#news">News</a>
<ul class="minitoc">
<li>
<a href="#27+November+2011+-+Solr+3.5.0+Released">27 November 2011 - Solr 3.5.0 Released</a>
</li>
<li>
<a href="#18+November+2011+-+2nd+edition+of+the+first+book+on+Solr+published%21">18 November 2011 - 2nd edition of the first book on Solr published!</a>
</li>
<li>
<a href="#26+October+2011+-+Java+7u1+fixes+index+corruption+and+crash+bugs+in+Apache+Lucene+Core+and+Apache+Solr">26 October 2011 - Java 7u1 fixes index corruption and crash bugs in Apache Lucene Core and Apache Solr</a>
</li>
<li>
<a href="#14+September+2011+-+Solr+3.4.0+Released">14 September 2011 - Solr 3.4.0 Released</a>
</li>
<li>
<a href="#28+July+2011+-+WARNING%3A+Index+corruption+and+crashes+in+Apache+Lucene+Core+%2F+Apache+Solr+with+Java+7">28 July 2011 - WARNING: Index corruption and crashes in Apache Lucene Core / Apache Solr with Java 7</a>
</li>
<li>
<a href="#22+July+2011+-+Solr+3.1+cookbook+published%21">22 July 2011 - Solr 3.1 cookbook published!</a>
</li>
<li>
<a href="#July+2011+-+Solr+3.3+Released">July 2011 - Solr 3.3 Released</a>
</li>
<li>
<a href="#May+2011+-+Solr+3.2+Released">May 2011 - Solr 3.2 Released</a>
</li>
<li>
<a href="#March+2011+-+Solr+3.1+Released">March 2011 - Solr 3.1 Released</a>
</li>
<li>
<a href="#25+June+2010+-+Solr+1.4.1+Released">25 June 2010 - Solr 1.4.1 Released</a>
</li>
<li>
<a href="#7+May+2010+-+Apache+Lucene+Eurocon+2010+Coming+to+Prague+May+18-21">7 May 2010 - Apache Lucene Eurocon 2010 Coming to Prague May 18-21</a>
</li>
<li>
<a href="#10+November+2009+-+Solr+1.4+Released">10 November 2009 - Solr 1.4 Released</a>
</li>
<li>
<a href="#20+August+2009+-+Solr%27s+first+book+is+published%21">20 August 2009 - Solr's first book is published!</a>
</li>
<li>
<a href="#18+August+2009+-+Lucene+at+US+ApacheCon">18 August 2009 - Lucene at US ApacheCon</a>
</li>
<li>
<a href="#09+February+2009+-+Lucene+at+ApacheCon+Europe+2009+in+Amsterdam">09 February 2009 - Lucene at ApacheCon Europe 2009 in Amsterdam</a>
</li>
<li>
<a href="#19+December+2008+-+Solr+Logo+Contest+Results">19 December 2008 - Solr Logo Contest Results</a>
</li>
<li>
<a href="#03+October+2008+-+Solr+Logo+Contest">03 October 2008 - Solr Logo Contest</a>
</li>
<li>
<a href="#15+September+2008+-+Solr+1.3.0+Available">15 September 2008 - Solr 1.3.0 Available</a>
</li>
<li>
<a href="#28+August+2008+-+Lucene%2FSolr+at+ApacheCon+New+Orleans">28 August 2008 - Lucene/Solr at ApacheCon New Orleans</a>
</li>
<li>
<a href="#03+September+2007+-+Lucene+at+ApacheCon+Atlanta">03 September 2007 - Lucene at ApacheCon Atlanta</a>
</li>
<li>
<a href="#06+June+2007%3A+Release+1.2+available">06 June 2007: Release 1.2 available</a>
</li>
<li>
<a href="#17+January+2007%3A+Solr+graduates+from+Incubator">17 January 2007: Solr graduates from Incubator</a>
</li>
<li>
<a href="#22+December+2006%3A+Release+1.1.0+available">22 December 2006: Release 1.1.0 available</a>
</li>
<li>
<a href="#15+August+2006%3A+Solr+at+ApacheCon+US">15 August 2006: Solr at ApacheCon US</a>
</li>
<li>
<a href="#21+April+2006%3A+Solr+at+ApacheCon">21 April 2006: Solr at ApacheCon</a>
</li>
<li>
<a href="#21+February+2006%3A+nightly+builds">21 February 2006: nightly builds</a>
</li>
<li>
<a href="#17+January+2006%3A+Solr+Joins+Apache+Incubator">17 January 2006: Solr Joins Apache Incubator</a>
</li>
</ul>
</li>
</ul>
</div>
<a name="N1000E"></a><a name="intro"></a>
<h2 class="boxed">What Is Solr?</h2>
<div class="section">
<p>
Solr is the popular, blazing fast open source enterprise search
platform from the Apache Lucene project. Its major features include
powerful full-text search, hit highlighting, faceted search, dynamic
clustering, database integration, rich document (e.g., Word, PDF)
handling, and geospatial search. Solr is highly scalable, providing distributed search and
index replication, and it powers the search and navigation features of
many of the world's largest internet sites.
</p>
<p>
Solr is written in Java and runs as a standalone full-text search server
within a servlet container such as <a href="http://tomcat.apache.org">Tomcat</a>.
Solr uses the <a href="http://lucene.apache.org/java/">Lucene Java</a>
search library at its core for full-text indexing and search, and has
REST-like HTTP/XML and JSON APIs that make it easy to use from virtually
any programming language. Solr's powerful external configuration allows it to
be tailored to almost any type of application without Java coding, and
it has an extensive plugin architecture when more advanced
customization is required.
</p>
<p>
See the complete <a href="features.html">feature list</a> for more details.
</p>
<p>
For more information about Solr, please see the <a href="http://wiki.apache.org/solr/FrontPage">Solr wiki</a>.
</p>
</div>
<a name="N10031"></a><a name="getstarted"></a>
<h2 class="boxed">Get Started</h2>
<div class="section">
<ul>
<li>Download Solr <a href="http://www.apache.org/dyn/closer.cgi/lucene/solr/">here</a>
</li>
<li>Check out the <a href="tutorial.html">tutorial</a>
</li>
<li>Read the <a href="http://wiki.apache.org/solr/FrontPage">Solr wiki</a> to learn more</li>
<li>Join the <a href="mailing_lists.html">community</a>
</li>
<li>
<a href="http://wiki.apache.org/solr/HowToContribute">Give Back</a>! (Optional, but encouraged!)</li>
</ul>
</div>
<a name="N1005A"></a><a name="news"></a>
<h2 class="boxed">News</h2>
<div class="section">
<a name="N10060"></a><a name="27+November+2011+-+Solr+3.5.0+Released"></a>
<h3 class="boxed">27 November 2011 - Solr 3.5.0 Released</h3>
<p>
The Lucene PMC is pleased to announce the release of
<a href="http://www.apache.org/dyn/closer.cgi/lucene/solr">Apache Solr 3.5.0</a>!
</p>
<p>
See the CHANGES.txt file included with the release for a full list of details.
</p>
<p>Solr 3.5.0 Release Highlights:</p>
<ul>
<li>
Bug fixes and improvements from Apache Lucene 3.5.0, including a
very substantial (3-5X) RAM reduction required to hold the terms
index on opening an <span class="codefrag">IndexReader</span>.
(<a href="https://issues.apache.org/jira/browse/LUCENE-2205">LUCENE-2205</a>)
</li>
<li>
Added support for distributed result grouping.
(<a href="https://issues.apache.org/jira/browse/SOLR-2066">SOLR-2066</a>,
<a href="https://issues.apache.org/jira/browse/SOLR-2776">SOLR-2776</a>)
</li>
<li>
Added support for Hunspell stemmer <span class="codefrag">TokenFilter</span> supporting
stemming for 99 languages.
(<a href="https://issues.apache.org/jira/browse/SOLR-2769">SOLR-2769</a>)
</li>
<li>
A new contrib module "langid" adds language identification
capabilities as an Update Processor, using Tika's
<span class="codefrag">LanguageIdentifier</span> or Cybozu language-detection library
(<a href="https://issues.apache.org/jira/browse/SOLR-1979">SOLR-1979</a>)
</li>
<li>
Numeric types including Trie and date types now support
<span class="codefrag">sortMissingFirst</span>/<span class="codefrag">Last</span>.
(<a href="https://issues.apache.org/jira/browse/SOLR-2881">SOLR-2881</a>)
</li>
<li>
Added <span class="codefrag">hl.q</span> parameter. It is optional and if it is specified,
it overrides <span class="codefrag">q</span> parameter in <span class="codefrag">Highlighter</span>.
(<a href="https://issues.apache.org/jira/browse/SOLR-1926">SOLR-1926</a>)
</li>
<li>
Several minor bugfixes like date parsing for years from 0001-1000, ignored
configurations when using <span class="codefrag">QueryAnalyzer</span> with
<span class="codefrag">SpellCheckComponent</span> and many more.
See CHANGES.txt entries for full details.
</li>
</ul>
<a name="N100C6"></a><a name="18+November+2011+-+2nd+edition+of+the+first+book+on+Solr+published%21"></a>
<h3 class="boxed">18 November 2011 - 2nd edition of the first book on Solr published!</h3>
<p>
<img alt="Apache Solr 3 Enterprise Search Server cover" class="float-right" src="images/as3ess_book.jpg">
David Smiley and Eric Pugh proudly announce the second edition of the first book on Solr,
<a href="http://link.packtpub.com/2LjDxE" title="PACKT: Apache Solr 3 Enterprise Search Server">"Apache Solr 3 Enterprise Search Server"</a>
from Packt Publishing.</p>
<p>Apache Solr 3 Enterprise Search Server is a comprehensive reference guide for nearly every feature has to
offer. Through using a large set of metadata about artists, releases, and tracks courtesy of the
MusicBrainz.org project, you will have a testing ground for learning Solr. You'll learn how to design a
schema, use appropriate text analysis and then how to import this data in various
ways. Next, you'll learn how to search this data, how to use advanced relevancy tuning, and how to enhance
standard search results with highlighting, faceting, query auto-complete, and other features. The book,
supported with working code examples in various languages, shows how to use a wide selection of Solr
integration client libraries, frameworks and other software like web crawlers. The book wraps up with
deployment considerations, tuning Solr performance, and scaling Solr to multiple machines.
</p>
<p>This edition naturally covers the latest features in Solr as of version 3.4 like Result Grouping and
Geospatial, but this is not a small update to the first book. No chapter was untouched &mdash; some were
revamped significantly and the content was expanded by about 25% by page count. Each chapter has a tip in the
introduction that advises readers in a hurry on what parts should be read now or later. Finally, it includes a
2-page parameter quick-reference appendix that you will surely find useful printed on your desk.
</p>
<p>You can find further information at <a href="http://link.packtpub.com/2LjDxE">the publisher's site</a>
and at <a href="http://www.solrenterprisesearchserver.com">the authors' site</a>, including a free chapter and
search parameter quick-reference sheet (the appendix).
</p>
<a name="N100EA"></a><a name="26+October+2011+-+Java+7u1+fixes+index+corruption+and+crash+bugs+in+Apache+Lucene+Core+and+Apache+Solr"></a>
<h3 class="boxed">26 October 2011 - Java 7u1 fixes index corruption and crash bugs in Apache Lucene Core and Apache Solr</h3>
<p>Oracle released <a href="http://www.oracle.com/technetwork/java/javase/7u1-relnotes-507962.html">Java 7u1</a> on October 19.
According to the release notes and tests done by the Lucene committers, all bugs reported on July 28 are fixed in this release,
so code using Porter stemmer no longer crashes with <span class="codefrag">SIGSEGV</span>. We were not able to experience any index corruption anymore,
so it is safe to use Java 7u1 with Lucene Core and Solr.</p>
<p>On the same day, Oracle released <a href="http://www.oracle.com/technetwork/java/javase/6u29-relnotes-507960.html">Java 6u29</a>
fixing the same problems occurring with Java 6, if the JVM switches <span class="codefrag">-XX:+AggressiveOpts</span>
or <span class="codefrag">-XX:+OptimizeStringConcat</span> were used. Of course, you should <strong>not</strong> use experimental JVM options like
<span class="codefrag">-XX:+AggressiveOpts</span> in production environments! We recommend everybody to upgrade to this latest version 6u29.</p>
<p>In case you upgrade to Java 7, remember that you may have to reindex, as the unicode
version shipped with Java 7 changed and tokenization behaves differently
(e.g. lowercasing). For more information, read <span class="codefrag">JRE_VERSION_MIGRATION.txt</span>
in your distribution package!</p>
<a name="N10113"></a><a name="14+September+2011+-+Solr+3.4.0+Released"></a>
<h3 class="boxed">14 September 2011 - Solr 3.4.0 Released</h3>
<p>The Lucene PMC is pleased to announce the release of <a href="http://www.apache.org/dyn/closer.cgi/lucene/solr">Apache Solr 3.4.0</a>!
</p>
<p>
Solr's version number was synced with Lucene following the Lucene/Solr merge, so Solr 3.4.0 contains Lucene 3.4.0.
</p>
<p>
If you are already using Apache Solr 3.1, 3.2 or 3.3, we strongly recommend you upgrade to 3.4.0 because of the index corruption bug on OS or computer crash or power loss (<a href="https://issues.apache.org/jira/browse/LUCENE-3418">LUCENE-3418</a>), now fixed in 3.4.0.</p>
<p>
Solr 3.4.0 release highlights include
</p>
<ul>
<li>Bug fixes and improvements from Apache Lucene 3.4.0, including a
major bug (<a href="https://issues.apache.org/jira/browse/LUCENE-3418">LUCENE-3418</a>) whereby a Lucene index could
easily become corrupted if the OS or computer crashed or lost
power.</li>
<li>SolrJ client can now parse grouped and range facets results
(<a href="https://issues.apache.org/jira/browse/SOLR-2523">SOLR-2523</a>).</li>
<li>A new <span class="codefrag">XsltUpdateRequestHandler</span> allows posting XML that's
transformed by a provided XSLT into a valid Solr document
(<a href="https://issues.apache.org/jira/browse/SOLR-2630">SOLR-2630</a>).</li>
<li>Post-group faceting option (<span class="codefrag">group.truncate</span>) can now compute
facet counts for only the highest ranking documents per-group.
(<a href="https://issues.apache.org/jira/browse/SOLR-2665">SOLR-2665</a>).</li>
<li>Add <span class="codefrag">commitWithin</span> update request parameter to all update handlers
that were previously missing it. This tells Solr to commit the
change within the specified amount of time (<a href="https://issues.apache.org/jira/browse/SOLR-2540">SOLR-2540</a>).</li>
<li>You can now specify <span class="codefrag">NIOFSDirectory</span> (<a href="https://issues.apache.org/jira/browse/SOLR-2670">SOLR-2670</a>).</li>
<li>New parameter <span class="codefrag">hl.phraseLimit</span> speeds up <span class="codefrag">FastVectorHighlighter</span>
(<a href="https://issues.apache.org/jira/browse/LUCENE-3234">LUCENE-3234</a>).</li>
<li>The query cache and filter cache can now be disabled per request.
See <a href="http://wiki.apache.org/solr/CommonQueryParameters#Caching_of_filters">this wiki page</a>
(<a href="https://issues.apache.org/jira/browse/SOLR-2429">SOLR-2429</a>).</li>
<li> Improved memory usage, build time, and performance of
<span class="codefrag">SynonymFilterFactory</span> (<a href="https://issues.apache.org/jira/browse/LUCENE-3233">LUCENE-3233</a>).</li>
<li> Added <span class="codefrag">omitPositions</span> to the schema, so you can omit position
information while still indexing term frequencies (<a href="https://issues.apache.org/jira/browse/LUCENE-2048">LUCENE-2048</a>).</li>
<li>Various fixes for multi-threaded <span class="codefrag">DataImportHandler</span>.</li>
</ul>
<p>See the <a href="http://svn.apache.org/repos/asf/lucene/dev/tags/lucene_solr_3_4_0/solr/CHANGES.txt">release notes</a> for a more complete list of all the new features, improvements, and bugfixes.
</p>
<a name="N101A0"></a><a name="28+July+2011+-+WARNING%3A+Index+corruption+and+crashes+in+Apache+Lucene+Core+%2F+Apache+Solr+with+Java+7"></a>
<h3 class="boxed">28 July 2011 - WARNING: Index corruption and crashes in Apache Lucene Core / Apache Solr with Java 7</h3>
<p>Oracle released <a href="http://www.oracle.com/technetwork/java/javase/jdk7-relnotes-429209.html">Java 7</a> today.
Unfortunately it contains hotspot compiler optimizations, which miscompile some loops.
This can affect code of several Apache projects. Sometimes JVMs only crash, but in several cases,
results calculated can be incorrect, leading to bugs in applications
(see Hotspot bugs <a href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7070134">7070134</a>,
<a href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7044738">7044738</a>,
<a href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7068051">7068051</a>).</p>
<p>
<strong>Apache Lucene Core</strong> and <strong>Apache Solr</strong> are two Apache projects,
which are affected by these bugs, namely all versions released until today.
Solr users with the default configuration will have
Java crashing with <span class="codefrag">SIGSEGV</span> as soon as they start to index documents, as one
affected part is the well-known Porter stemmer
(see <a href="https://issues.apache.org/jira/browse/LUCENE-3335">LUCENE-3335</a>).
Other loops in Lucene may be miscompiled, too, leading to index corruption
(especially on Lucene trunk with pulsing codec; other loops may be
affected, too - <a href="https://issues.apache.org/jira/browse/LUCENE-3346">LUCENE-3346</a>).</p>
<p>These problems were detected only 5 days before the official Java 7 release,
so Oracle had no time to fix those bugs, affecting also many more applications.
In response to our questions, they proposed to include the fixes into service
release u2 (eventually into service release u1, see
<a href="http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2011-July/005971.html">this mail</a>).
<strong>This means you cannot use Apache Lucene/Solr with Java 7 releases before Update 2!</strong>
If you do, please don't open bug reports, it is not the committers' fault!
At least disable loop optimizations using the <span class="codefrag">-XX:-UseLoopPredicate</span> JVM option
to not risk index corruptions.</p>
<p>
<em>Please note:</em> Also Java 6 users are affected, if they use one of those
JVM options, which are <strong>not</strong> enabled by default: <span class="codefrag">-XX:+OptimizeStringConcat</span>
or <span class="codefrag">-XX:+AggressiveOpts</span>.</p>
<p>It is strongly recommended not to use any hotspot optimization switches in any Java
version without extensive testing!</p>
<p>In case you upgrade to Java 7, remember that you may have to reindex, as the unicode
version shipped with Java 7 changed and tokenization behaves differently
(e.g. lowercasing). For more information, read <span class="codefrag">JRE_VERSION_MIGRATION.txt</span>
in your distribution package!</p>
<a name="N101F0"></a><a name="22+July+2011+-+Solr+3.1+cookbook+published%21"></a>
<h3 class="boxed">22 July 2011 - Solr 3.1 cookbook published!</h3>
<p>
<img alt="Solr Cookbook cover" class="float-right" src="images/solr_31_cookbook.jpg">Rafał Kuć is proud to introduce a new book on Solr, <a href="http://www.packtpub.com/solr-3-1-enterprise-search-server-cookbook/book" title="PACKT:Apache Solr 3.1 Cookbook">"Apache Solr 3.1 Cookbook"</a> from Packt Publishing.</p>
<p>The Solr 3.1 Cookbook will make your everyday work easier by using real-life examples that show you how to deal with the most common problems that can arise while using the Apache Solr search engine.</p>
<p>This cookbook will show you how to get the most out of your search engine. Each chapter covers a different aspect of working with Solr from analyzing your text data through querying, performance improvement, and developing your own modules. The practical recipes will help you to quickly solve common problems with data analysis, show you how to use faceting to collect data and to speed up the performance of Solr. You will learn about functionalities that most newbies are unaware of, such as sorting results by a function value, highlighting matched words, and computing statistics to make your work with Solr easy and stress free.</p>
<a name="N10209"></a><a name="July+2011+-+Solr+3.3+Released"></a>
<h3 class="boxed">July 2011 - Solr 3.3 Released</h3>
<p>The Lucene PMC is pleased to announce the release of <a href="http://www.apache.org/dyn/closer.cgi/lucene/solr">Apache Solr 3.3</a>!
</p>
<p>
Solr's version number was synced with Lucene following the Lucene/Solr merge, so Solr 3.3 contains Lucene 3.3.
</p>
<p>
Solr 3.3 release highlights include
</p>
<ul>
<li>Grouping / Field Collapsing</li>
<li>A new, automaton-based suggest/autocomplete implementation offering an
order of magnitude smaller RAM consumption.</li>
<li>KStemFilterFactory, an optimized implementation of a less aggressive
stemmer for English.</li>
<li>Solr defaults to a new, more efficient merge policy (TieredMergePolicy).
See <a href="http://s.apache.org/merging">http://s.apache.org/merging</a> for more information.</li>
<li>Important bugfixes, including extremely high RAM usage in spellchecking.</li>
<li>Bugfixes and improvements from Apache Lucene 3.3</li>
</ul>
<p>See the <a href="http://svn.apache.org/repos/asf/lucene/dev/tags/lucene_solr_3_3/solr/CHANGES.txt">release notes</a> for a more complete list of all the new features, improvements, and bugfixes.
</p>
<a name="N1023D"></a><a name="May+2011+-+Solr+3.2+Released"></a>
<h3 class="boxed">May 2011 - Solr 3.2 Released</h3>
<p>The Lucene PMC is pleased to announce the release of <a href="http://www.apache.org/dyn/closer.cgi/lucene/solr">Apache Solr 3.2</a>!
</p>
<p>
Solr's version number was synced with Lucene following the Lucene/Solr merge, so Solr 3.2 contains Lucene 3.2.
Solr 3.2 is the first release after Solr 3.1.
</p>
<p>
Solr 3.2 release highlights include
</p>
<ul>
<li>Ability to specify overwrite and commitWithin as request parameters when using the JSON update format</li>
<li>TermQParserPlugin, useful when generating filter queries from terms returned from field faceting or the terms component.</li>
<li>DebugComponent now supports using a NamedList to model Explanation objects in it's responses instead of Explanation.toString</li>
<li>Improvements to the UIMA and Carrot2 integrations</li>
<li>Bugfixes and improvements from Apache Lucene 3.2</li>
</ul>
<p>See the <a href="http://svn.apache.org/repos/asf/lucene/dev/tags/lucene_solr_3_2/solr/CHANGES.txt">release notes</a> for a more complete list of all the new features, improvements, and bugfixes.
</p>
<a name="N1026A"></a><a name="March+2011+-+Solr+3.1+Released"></a>
<h3 class="boxed">March 2011 - Solr 3.1 Released</h3>
<p>The Lucene PMC is pleased to announce the release of <a href="http://www.apache.org/dyn/closer.cgi/lucene/solr">Apache Solr 3.1</a>!
</p>
<p>
Solr's version number was synced with Lucene following the Lucene/Solr merge, so Solr 3.1 contains Lucene 3.1.
Solr 3.1 is the first release after Solr 1.4.1.
</p>
<p>
Solr 3.1 release highlights include
</p>
<ul>
<li>
<a href="http://wiki.apache.org/solr/SimpleFacetParameters#Facet_by_Range">Numeric range facets</a> (similar to date faceting).</li>
<li>New <a href="http://wiki.apache.org/solr/SpatialSearch">spatial search</a>, including spatial filtering, boosting and sorting capabilities.</li>
<li>Example Velocity driven search UI at <a href="http://localhost:8983/solr/browse">http://localhost:8983/solr/browse</a>
</li>
<li>A new faster <a href="http://wiki.apache.org/solr/HighlightingParameters">termvector-based highlighter</a>.</li>
<li>Extended dismax (edismax) query parser with support for fielded queries, enhanced relevancy, and full lucene syntax support.</li>
<li>Distributed search support for the <a href="http://wiki.apache.org/solr/SpellCheckComponent">Spell check</a>
and <a href="http://wiki.apache.org/solr/TermsComponent">Terms</a> components.</li>
<li>
<a href="http://wiki.apache.org/solr/Suggester">Suggester</a>, a fast trie-based autocomplete component.</li>
<li>Sort results by any <a href="http://wiki.apache.org/solr/FunctionQuery#Sort_By_Function any function">function query</a>.</li>
<li>
<a href="http://wiki.apache.org/solr/UpdateJSON">JSON document indexing</a>.</li>
<li>
<a href="http://wiki.apache.org/solr/CSVResponseWriter">CSV response format</a>
</li>
<li>
<a href="http://wiki.apache.org/solr/SolrUIMA">Apache UIMA integration</a> for metadata extraction.</li>
<li>Tons of optimizations, bugfixes, and new analysis capabilities via <a href="http://lucene.apache.org/java/docs/index.html">Apache Lucene 3.1</a>.</li>
</ul>
<p>See the <a href="http://svn.apache.org/repos/asf/lucene/dev/tags/lucene_solr_3_1/solr/CHANGES.txt">release notes</a> for a more complete list of all the new features, improvements, and bugfixes.
</p>
<a name="N102D5"></a><a name="25+June+2010+-+Solr+1.4.1+Released"></a>
<h3 class="boxed">25 June 2010 - Solr 1.4.1 Released</h3>
<p>
Solr 1.4.1 has been released and is now available for public
<a href="http://www.apache.org/dyn/closer.cgi/lucene/solr/">download</a>!
Solr 1.4.1 is a bug fix release for Solr 1.4 that includes many
Solr bug fixes as well as Lucene bug fixes from Lucene 2.9.3.
</p>
<p>
See the <a href="http://svn.apache.org/repos/asf/lucene/solr/tags/release-1.4.1/CHANGES.txt">release notes</a>
for more details.
</p>
<a name="N102EA"></a><a name="7+May+2010+-+Apache+Lucene+Eurocon+2010+Coming+to+Prague+May+18-21"></a>
<h3 class="boxed">7 May 2010 - Apache Lucene Eurocon 2010 Coming to Prague May 18-21</h3>
<p>
On May 18th to the 21st Prague will play host to the first
ever dedicated Lucene and Solr User Conference in Europe:
<a href="http://lucene-eurocon.org/">Apache Lucene
Eurocon 2010</a>.
This is a a not-for-profit conference presented by Lucid
Imagination, with net proceeds being
donated to The Apache Software Foundation.
<a href="http://guest.cvent.com/i.aspx?4W%2cM3%2c4d21e59c-fd92-4a83-bc1f-175dc506905f">Registration
is now open</a>. Schedule highlights include:
</p>
<ul>
<li>
<a href="http://lucene-eurocon.org/training.html">Two
days of in depth training classes</a>:
<ul>
<li>Solr Application Development Workshop - Erik Hatcher</li>
<li>Lucene Bootcamp - Grant Ingersoll</li>
</ul>
</li>
<li>
<a href="http://lucene-eurocon.org/sessions-general.html">Four
general sessions</a>:
<ul>
<li>The Search Revolution: How Lucene &amp; Solr Are
Changing The World - Eric Gries</li>
<li>From Publisher To Platform: How The Guardian
Used Content, Search, and Open Source To Build a
Powerful New Business Model - Stephen Dunn</li>
<li>Software Disruption: How Using Open Source,
Search, Big Data and Cloud technology are
Disrupting IT - Zack Urlocker</li>
<li>Solr 1.5 and Beyond - Yonik Seeley</li>
</ul>
</li>
<li>
<a href="http://lucene-eurocon.org/agenda.html">24
technical sessions, spanning two days, divided into two
tracks</a>
</li>
<li>
<a href="http://lucene-eurocon.org/meetup.html">A
Thursday night MeetUp</a>
</li>
<li>
<a href="http://lucene-eurocon.org/beerfestival.html">An
event at the
Czech Beer Festival</a>
</li>
</ul>
<a name="N10336"></a><a name="10+November+2009+-+Solr+1.4+Released"></a>
<h3 class="boxed">10 November 2009 - Solr 1.4 Released</h3>
<p>
Solr 1.4 has been released and is now available for public <a href="http://www.apache.org/dyn/closer.cgi/lucene/solr/">download</a>!
New Solr 1.4 features include
</p>
<ul>
<li>Major performance enhancements in indexing, searching, and faceting</li>
<li>Revamped all-Java index replication that's simple to configure and
can replicate config files</li>
<li>Greatly improved database integration via the DataImportHandler</li>
<li>Rich document processing (Word, PDF, HTML) via Apache Tika</li>
<li>Dynamic search results clustering via Carrot2</li>
<li>Multi-select faceting (support for multiple items in a single
category to be selected)</li>
<li>Many powerful query enhancements, including ranges over arbitrary
functions, nested queries of different syntaxes</li>
<li>Many other plugins including Terms for auto-suggest, Statistics,
TermVectors, Deduplication</li>
</ul>
<p>See the <a href="http://svn.apache.org/repos/asf/lucene/solr/tags/release-1.4.0/CHANGES.txt">release notes</a> for more details.
</p>
<a name="N10366"></a><a name="20+August+2009+-+Solr%27s+first+book+is+published%21"></a>
<h3 class="boxed">20 August 2009 - Solr's first book is published!</h3>
<p>
<a href="http://www.packtpub.com/solr-1-4-enterprise-search-server?utm_source=http%3A%2F%2Flucene.apache.org%2Fsolr%2F&amp;utm_medium=spons&amp;utm_content=pod&amp;utm_campaign=mdb_000275" title="PACKT:Solr 1.4 Enterprise Search Server"><img alt="Solr book cover" class="float-right" src="images/solr-book-image.jpg"></a>
David Smiley and Eric Pugh are proud to introduce the first book on Solr, <strong><a href="http://www.packtpub.com/solr-1-4-enterprise-search-server?utm_source=http%3A%2F%2Flucene.apache.org%2Fsolr%2F&amp;utm_medium=spons&amp;utm_content=pod&amp;utm_campaign=mdb_000275">"Solr 1.4 Enterprise Search Server"</a></strong> from Packt Publishing.
</p>
<p>This book is a comprehensive reference guide for nearly every feature Solr has to offer. It serves the reader right from initiation to development to deployment. It also comes with complete running examples to demonstrate its use and show how to integrate it with other languages and frameworks.
</p>
<p>To keep this interesting and realistic, it uses a large open source set of metadata about artists, releases, and tracks courtesy of the MusicBrainz.org project. Using this data as a testing ground for Solr, you will learn how to import this data in various ways from CSV to XML to database access. You will then learn how to search this data in a myriad of ways, including Solr's rich query syntax, "boosting" match scores based on record data and other means, about searching across multiple fields with different boosts, getting facets on the results, auto-complete user queries, spell-correcting searches, highlighting queried text in search results, and so on.
</p>
<p>After this thorough tour, you'll see working examples of integrating a variety of technologies with Solr such as Java, JavaScript, Drupal, Ruby, PHP, and Python.
</p>
<p>Finally, this book covers various deployment considerations to include indexing strategies and performance-oriented configuration that will enable you to scale Solr to meet the needs of a high-volume site.
</p>
<a name="N10386"></a><a name="18+August+2009+-+Lucene+at+US+ApacheCon"></a>
<h3 class="boxed">18 August 2009 - Lucene at US ApacheCon</h3>
<p>
<a href="http://www.us.apachecon.com/c/acus2009/" title="ApacheCon US 2009"><img alt="ApacheCon Logo" class="float-right" src="http://www.apache.org/events/current-event-125x125.png"></a>
<a href="http://www.us.apachecon.com/c/acus2009/">ApacheCon US</a>
is once again in the Bay Area and Lucene is coming along
for the ride! The Lucene community has planned two full days of
talks, plus a meetup and the usual bevy of training. With a
well-balanced mix of first time and veteran ApacheCon speakers, the <a href="http://www.us.apachecon.com/c/acus2009/schedule#lucene">Lucene
track</a> at ApacheCon US promises to have something for everyone.
Be sure not to miss:
</p>
<p>Training:</p>
<ul>
<li>
<a href="http://www.us.apachecon.com/c/acus2009/sessions/437">Lucene Boot
Camp</a> - A two day training session, Nov. 2nd &amp; 3rd</li>
<li>
<a href="http://www.us.apachecon.com/c/acus2009/sessions/375">Solr
Day</a> - A one day training session, Nov. 2nd</li>
</ul>
<p>Thursday, Nov. 5th</p>
<ul>
<li>
<a href="http://www.us.apachecon.com/c/acus2009/sessions/428">Introduction
to the Lucene Ecosystem</a> - Grant Ingersoll @ 9:00</li>
<li>
<a href="http://www.us.apachecon.com/c/acus2009/sessions/461">Lucene
Basics and New Features</a> - Michael Busch @ 10:00</li>
<li>
<a href="http://www.us.apachecon.com/c/acus2009/sessions/331">Apache
Solr: Out of the Box</a> - Chris Hostetter @ 14:00</li>
<li>
<a href="http://www.us.apachecon.com/c/acus2009/sessions/427">Introduction
to Nutch</a> - Andrzej Bialecki @ 15:00</li>
<li>
<a href="http://www.us.apachecon.com/c/acus2009/sessions/430">Lucene and
Solr Performance Tuning</a> - Mark Miller @ 16:30</li>
</ul>
<p>Friday, Nov. 6th</p>
<ul>
<li>
<a href="http://www.us.apachecon.com/c/acus2009/sessions/332">Implementing
an Information Retrieval Framework for an Organizational
Repository</a> - Sithu D Sudarsan @ 9:00</li>
<li>
<a href="http://www.us.apachecon.com/c/acus2009/sessions/333">Apache
Mahout - Going from raw data to Information</a> - Isabel Drost @ 10:00</li>
<li>
<a href="http://www.us.apachecon.com/c/acus2009/sessions/334">MIME
Magic with Apache Tika</a> - Jukka Zitting @ 11:30</li>
<li>
<a href="http://www.us.apachecon.com/c/acus2009/sessions/335">Building
Intelligent Search Applications with the Lucene
Ecosystem</a> - Ted Dunning @ 14:00</li>
<li>
<a href="http://www.us.apachecon.com/c/acus2009/sessions/462">Realtime
Search</a> - Jason Rutherglen @ 15:00</li>
</ul>
<a name="N103FA"></a><a name="09+February+2009+-+Lucene+at+ApacheCon+Europe+2009+in+Amsterdam"></a>
<h3 class="boxed">09 February 2009 - Lucene at ApacheCon Europe 2009 in Amsterdam</h3>
<p>
<a href="http://www.eu.apachecon.com/c/aceu2009/" title="ApacheCon EU 2009"><img alt="ApacheCon EU 2009 Logo" class="float-right" src="http://www.eu.apachecon.com/page_attachments/0000/0115/125x125_basic.gif"></a>
Lucene will be extremely well represented at
<a href="http://us.apachecon.com/c/acus2008/">ApacheCon US 2009</a>
in Amsterdam, Netherlands this March 23-27, 2009:
</p>
<ul>
<li>
<a href="http://eu.apachecon.com/c/aceu2009/sessions/197">Lucene Boot Camp</a> - A two day training session, March 23 &amp; 24th</li>
<li>
<a href="http://eu.apachecon.com/c/aceu2009/sessions/201">Solr Boot Camp</a> - A one day training session, March 24th</li>
<li>
<a href="http://eu.apachecon.com/c/aceu2009/sessions/136">Introducing Apache Mahout</a> - Grant Ingersoll. March 25th @ 10:30</li>
<li>
<a href="http://eu.apachecon.com/c/aceu2009/sessions/137">Lucene/Solr Case Studies</a> - Erik Hatcher. March 25th @ 11:30</li>
<li>
<a href="http://eu.apachecon.com/c/aceu2009/sessions/138">Advanced Indexing Techniques with Apache Lucene</a> - Michael Busch. March 25th @ 14:00</li>
<li>
<a href="http://eu.apachecon.com/c/aceu2009/sessions/251">Apache Solr - A Case Study</a> - Uri Boness. March 26th @ 17:30</li>
<li>
<a href="http://eu.apachecon.com/c/aceu2009/sessions/250">Best of breed - httpd, forrest, solr and droids</a> - Thorsten Scherler. March 27th @ 17:30</li>
<li>
<a href="http://eu.apachecon.com/c/aceu2009/sessions/165">Apache Droids - an intelligent standalone robot framework</a> - Thorsten Scherler. March 26th @ 15:00</li>
</ul>
<a name="N10443"></a><a name="19+December+2008+-+Solr+Logo+Contest+Results"></a>
<h3 class="boxed">19 December 2008 - Solr Logo Contest Results</h3>
<p>Many great logos were submitted, but only one could be chosen. Congratulations Michiel,
the creator of the winning logo that is proudly displayed at the top of this page.
</p>
<a name="N1044C"></a><a name="03+October+2008+-+Solr+Logo+Contest"></a>
<h3 class="boxed">03 October 2008 - Solr Logo Contest</h3>
<p>By popular demand, Solr is holding a contest to pick a new Solr logo. Details about how to submit an entry can be found <a href="http://wiki.apache.org/solr/LogoContest">on the wiki</a>. The Deadline for submissions is November 20th, 2008 @ 11:59PM GMT.
</p>
<a name="N10459"></a><a name="15+September+2008+-+Solr+1.3.0+Available"></a>
<h3 class="boxed">15 September 2008 - Solr 1.3.0 Available</h3>
<p>Solr 1.3.0 is available for public download. This version contains many enhancements and bug fixes, including distributed search capabilities,
Lucene 2.3.x performance improvements and many others.
</p>
<p>See the <a href="http://svn.apache.org/repos/asf/lucene/solr/tags/release-1.3.0/CHANGES.txt">release notes</a> for more details. Download is
available from a <a href="http://www.apache.org/dyn/closer.cgi/lucene/solr/">Apache Mirror</a>.</p>
<a name="N1046D"></a><a name="28+August+2008+-+Lucene%2FSolr+at+ApacheCon+New+Orleans"></a>
<h3 class="boxed">28 August 2008 - Lucene/Solr at ApacheCon New Orleans</h3>
<p>
<a href="http://us.apachecon.com/c/acus2008/" title="ApacheCon US 2008"><img alt="ApacheCon US 2008 Logo" class="float-right" src="http://us.apachecon.com/page_attachments/0000/0003/Basic_125x125.jpg"></a>
Lucene will be extremely well represented at
<a href="http://us.apachecon.com/c/acus2008/">ApacheCon US 2008</a>
in New Orleans this November 3-7, 2008:
</p>
<ul>
<li>
<a href="http://us.apachecon.com/c/acus2008/sessions/69">Lucene Boot Camp</a> - A two day training session, November 3rd &amp; 4th</li>
<li>
<a href="http://us.apachecon.com/c/acus2008/sessions/91">Solr Boot Camp</a> - A one day training session, November 4th</li>
<!-- not listing all session explicitly since there is evidently still some flux in the schedule -->
<li>An <a href="http://us.apachecon.com/c/acus2008/schedule/2008/11/05">entire day of Lucene sessions</a> on November 5th</li>
</ul>
<a name="N1049B"></a><a name="03+September+2007+-+Lucene+at+ApacheCon+Atlanta"></a>
<h3 class="boxed">03 September 2007 - Lucene at ApacheCon Atlanta</h3>
<p>
<a href="http://www.us.apachecon.com"><img alt="ApacheCon US logo" class="float-right" src="http://www.apache.org/ads/ApacheCon/2007-usa-125x125.png"></a>
Lucene will once again be well represented at ApacheCon USA in Atlanta this November 12-16, 2007.
</p>
<p>The following talks and trainings are scheduled for this year's conference:</p>
<ul>
<li>November 12: <a href="http://us.apachecon.com/us2007/program/talk/1859">Lucene Boot Camp</a> by Grant Ingersoll. An all-day training focusing on getting started with Lucene.</li>
<li>November 16, 9:00 am: <a href="http://us.apachecon.com/us2007/program/talk/1992">Apache Solr out of the Box</a> by Chris Hostetter. Introduction to Solr.</li>
<li>November 16, 10:00 am: <a href="http://us.apachecon.com/us2007/program/talk/1943">Building a Vertical Search Site using Apache Software</a> by Ken Krugler. Will cover many Lucene-based projects.</li>
<li>November 16, 3:00 pm: <a href="http://us.apachecon.com/us2007/program/talk/1953">Apache Lucene Performance</a> by Grant Ingersoll. Tips and techniques for improving Lucene performance.</li>
<li>November 16, 4:00 pm: <a href="http://us.apachecon.com/us2007/program/talk/2017"> Advanced Indexing Techniques with Apache Lucene</a> by Michael Busch. Information on payloads and advanced indexing techniques.</li>
</ul>
<a name="N104D4"></a><a name="06+June+2007%3A+Release+1.2+available"></a>
<h3 class="boxed">06 June 2007: Release 1.2 available</h3>
<p>
This is the first release since Solr graduated from the Incubator,
bringing many new features, including CSV/delimited-text data
loading, time based autocommit, faster faceting, negative filters,
a spell-check handler, sounds-like word filters, regex text filters,
and more flexible plugins.
</p>
<p>See the <a href="http://svn.apache.org/repos/asf/lucene/solr/tags/release-1.2.0/CHANGES.txt">release notes</a> for more details.</p>
<a name="N104E5"></a><a name="17+January+2007%3A+Solr+graduates+from+Incubator"></a>
<h3 class="boxed">17 January 2007: Solr graduates from Incubator</h3>
<p>
Solr has graduated from the Apache Incubator, and is now a sub-project of Lucene.
</p>
<a name="N104EF"></a><a name="22+December+2006%3A+Release+1.1.0+available"></a>
<h3 class="boxed">22 December 2006: Release 1.1.0 available</h3>
<p>
This is the first release since Solr joined the Incubator, and brings
many new features and performance optimizations including highlighting,
faceted search, and JSON/Python/Ruby response formats.
</p>
<a name="N104F9"></a><a name="15+August+2006%3A+Solr+at+ApacheCon+US"></a>
<h3 class="boxed">15 August 2006: Solr at ApacheCon US</h3>
<p>Chris Hostetter will be presenting
<strong><a href="http://www.apachecon.com/2006/US/html/sessions.html#FR26">"Faceted Searching With Apache Solr"</a></strong>
at ApacheCon US 2006, on October 13th at 4:30pm.
See the <a href="http://www.us.apachecon.com/">ApacheCon</a> website for more details.
</p>
<a name="N1050C"></a><a name="21+April+2006%3A+Solr+at+ApacheCon"></a>
<h3 class="boxed">21 April 2006: Solr at ApacheCon</h3>
<p>Yonik Seeley will be presenting
<strong>"Apache Solr, a Full-Text Search Server based on Lucene"</strong>
at ApacheCon Europe 2006, on June 29th at 5:30pm.
See the <a href="http://www.eu.apachecon.com/">ApacheCon</a> website for more details.
</p>
<a name="N1051D"></a><a name="21+February+2006%3A+nightly+builds"></a>
<h3 class="boxed">21 February 2006: nightly builds</h3>
<p>Solr now has nightly builds. This automatically creates a
<a href="http://people.apache.org/builds/lucene/solr/nightly/">downloadable version of Solr every
night</a>. All unit tests must pass, or a message is sent to
the developers mailing list and no new version is created. This
also updates the <a href="api/index.html">javadoc</a>.</p>
<a name="N1052F"></a><a name="17+January+2006%3A+Solr+Joins+Apache+Incubator"></a>
<h3 class="boxed">17 January 2006: Solr Joins Apache Incubator</h3>
<p>Solr, a search server based on Lucene, has been accepted into the Apache Incubator.
Solr was originally developed by CNET Networks, and is widely used within CNET
to provide high relevancy search and faceted browsing capabilities.
</p>
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