全文搜索服務器，Apache Solr 5.4.0 發布

Apache Solr 5.4.0 發布，現已提供下載：

http://lucene.apache.org/solr/mirrors-solr-latest-redir.html 

更新日志：

https://lucene.apache.org/solr/5_4_0/changes/Changes.html 

Solr 5.4 值得關注的改進

新特性
------------

UI 改進
 * The re-architected Admin UI is now prominently linked to from the
   existing UI, and includes support for managing collections as well
   as creating and removing fields via the schema tab. Expect it to
   be default in the next release.

API 特性
 * New Collections APIs for migrating from clusterstate.json to
   per-collection state.json and forcing the election of a leader
   when all replicas in a shard are down.
 * A new configset management API has been added.

查詢特性
  Filter cache is now accessible via a solr query syntax.
  ScoreJoins can now refer to a single-sharded collection that is
   replicated on all nodes.
  Add boost support, and 'exclude the queried document' in MoreLikeThis
   QParser.
  Add a 'sort' local param to the collapse QParser to support using
   complex sort options to select the representitive doc for each
   collapsed group.

其他特性
  SolrJ now has support for connecting to Solr using basic
 authentication.
  Analyzing suggesters can now filter suggestions by a context field.
  JSON Facet API: add "method" param to terms/field facets to give an
   execution hint for what method should be used to facet.
  CloneFieldUpdateProcessorFactory now supports choosing a "dest" field
   name based on a regex pattern and replacement init options.
 * Provide pluggable context tool support for VelocityResponseWriter.