Solr 4.8.0 值得注意的改进记录如下：
* Apache Solr now requires Java 7 or greater (recommended is
Oracle Java 7 or OpenJDK 7, minimum update 55; earlier versions
have known JVM bugs affecting Solr).
* Apache Solr is fully compatible with Java 8.
*
There is no longer any reason to keep them in the schema file,
they may be safely removed. This allows intermixing of
* The new {!complexphrase} query parser supports wildcards, ORs etc.
inside Phrase Queries.
* New Collections API CLUSTERSTATUS action reports the status of
collections, shards, and replicas, and also lists collection
aliases and cluster properties.
* Added managed synonym and stopword filter factories, which enable
synonym and stopword lists to be dynamically managed via REST API.
* JSON updates now support nested child documents, enabling {!child}
and {!parent} block join queries.
* Added ExpandComponent to expand results collapsed by the
CollapsingQParserPlugin, as well as the parent/child relationship
of nested child documents.
* Long-running Collections API tasks can now be executed
asynchronously; the new REQUESTSTATUS action provides status.
* Added a hl.qparser parameter to allow you to define a query parser
for hl.q highlight queries.
* In Solr single-node mode, cores can now be created using named
configsets.
* New DocExpirationUpdateProcessorFactory supports computing an
expiration date for documents from the "TTL" expression, as well as
automatically deleting expired documents on a periodic basis.
除了上述的改进之外还包括了许多 Apache Lucene 新版本的系统优化和 bug 修复。
下载地址：http://lucene.apache.org/solr/mirrors-solr-latest-redir.html
来自:开源中国社区