Apache Solr 5.4.0 发布，全文搜索服务器

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　　Apache Solr 5.4.0 发布，现已提供下载：
　　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 值得关注的改进
　　新特性
　　------------
　　
　　UI 改进
　　* 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>　　
　　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.
　　
　　查询特性
　　* 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>
　　execution hint for what method should be used to>　　* CloneFieldUpdateProcessorFactory now supports choosing a "dest" field
　　name based on a regex pattern and replacement init options.
　　* Provide pluggable context tool support for VelocityResponseWriter.