Apache Solr 5.4.1 发布，更新如下： Bug Fixes (8) SOLR-8460: /analysis/field could throw exceptions for custom attributes. (David Smiley, Uwe Schindler) SOLR-8373: KerberosPlugin: Using multiple nodes on same machine leads clients to fetch TGT for every request (Ishan Chattopadhyaya via noble) SOLR-8059: &debug=results for distributed search when distrib.singlePass (sometimes activated automatically) could result in an NPE. (David Smiley, Markus Jelsma) SOLR-8422: When authentication enabled, requests fail if sent to a node that doesn't host the collection (noble) SOLR-7462: AIOOBE in RecordingJSONParser (Scott Dawson, noble) SOLR-8496: SolrIndexSearcher.getDocSet(List<Query>) incorrectly included deleted documents when all of the queries were uncached (or there was no filter cache). This caused multi-select faceting (including the JSON Facet API) to include deleted doc counts when the remaining non-excluded filters were all uncached. This bug was first introduced in 5.3.0 (Andreas Müller, Vasiliy Bout, Erick Erickson, Shawn Heisey, Hossman, yonik) SOLR-8418: Adapt to changes in LUCENE-6590 for use of boosts with MLTHandler and Simple/CloudMLTQParser (Jens Wille, Ramkumar Aiyengar) SOLR-8561: Doing a rolling upgrade to 5.4.0 fails because the new nodes cannot find the shard leader properties where they expect. This bug was first introduced in 5.4.0 and a fallback was added so that the leader properties are searched in both the old location and the new one. (Shai Erera) New Features (1) SOLR-8470: Make TTL of PKIAuthenticationPlugin's tokens configurable through a system property (pkiauth.ttl) (noble) 更多内容请看： http://apache.fayea.com/lucene/solr/5.4.1/ Apache Solr (读音: SOLer) 是一个开源的搜索服务器。Solr 使用 Java 语言开发，主要基于 HTTP 和 Apache Lucene 实现。Apache Solr 中存储的资源是以 Document 为对象进行存储的。每个文档由一系列的 Field 构成，每个 Field 表示资源的一个属性。Solr 中的每个 Document 需要有能唯一标识其自身的属性，默认情况下这个属性的名字是 id，在 Schema 配置文件中使用：id进行描述。 Apache Solr 5.4.1 发布，全文搜索服务器下载地址
