全文搜索服務器，Apache Solr 5.4.1 發布
Apache Solr (讀音: SOLer) 是一個開源的搜索服務器。Solr 使用 Java 語言開發，主要基于 HTTP 和 Apache Lucene 實現。Apache Solr 中存儲的資源是以 Document 為對象進行存儲的。每個文檔由一系列的 Field 構成，每個 Field 表示資源的一個屬性。Solr 中的每個 Document 需要有能唯一標識其自身的屬性，默認情況下這個屬性的名字是 id，在 Schema 配置文件中使用：id進行描述。
Apache Solr 5.4.1 發布，更新如下：
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Bug Fixes (8)
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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)
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SOLR-8470: Make TTL of PKIAuthenticationPlugin's tokens configurable through a system property (pkiauth.ttl)
(noble)
更多內容請看：
http://apache.fayea.com/lucene/solr/5.4.1/
來自： http://www.oschina.net//news/70128/solr-5-4-1