SOLR-1677: top of the Lucene Version issue

git-svn-id: https://svn.apache.org/repos/asf/lucene/solr/branches/solr@923568 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -110,6 +110,9 @@ New Features
 
 * SOLR-1815: SolrJ now preserves the order of facet queries. (yonik)
 
+* SOLR-1677: Add support for choosing the Lucene Version for Lucene components within
+  Solr. (Uwe Schindler, Mark Miller)
+
 Optimizations
 ----------------------
 

example/solr/conf/solrconfig.xml

@@ -32,6 +32,14 @@
      -->
   <abortOnConfigurationError>${solr.abortOnConfigurationError:true}</abortOnConfigurationError>
   
+  <!--
+    Controls what version of Lucene various components of Solr adhere to. Generally, you want
+    to use the latest version to get all bug fixes and improvements. It is highly recommended 
+    that you fully re-index after changing this setting as it can affect both how text is indexed
+    and queried.
+  -->
+  <luceneMatchVersion>LUCENE_31</luceneMatchVersion>
+
   <!-- lib directives can be used to instruct Solr to load an Jars identified
        and use them to resolve any "plugins" specified in your solrconfig.xml or
        schema.xml (ie: Analyzers, Request Handlers, etc...).

src/java/org/apache/solr/core/SolrConfig.java

@@ -136,6 +136,7 @@ public class SolrConfig extends Config {
     
     booleanQueryMaxClauseCount = getInt("query/maxBooleanClauses", BooleanQuery.getMaxClauseCount());
     luceneMatchVersion = getLuceneVersion("luceneMatchVersion", Version.LUCENE_24);
+    log.info("Using Lucene MatchVersion: " + luceneMatchVersion);
 
     filtOptEnabled = getBool("query/boolTofilterOptimizer/@enabled", false);
     filtOptCacheSize = getInt("query/boolTofilterOptimizer/@cacheSize",32);