Skip to end of metadata
Go to start of metadata
July 2013, Apache Solr™ 4.4 available
The Lucene PMC is pleased to announce the release of Apache Solr 4.4

Solr is the popular, blazing fast, open source NoSQL search platform
from the Apache Lucene project. Its major features include powerful
full-text search, hit highlighting, faceted search, dynamic
clustering, database integration, rich document (e.g., Word, PDF)
handling, and geospatial search.  Solr is highly scalable, providing
fault tolerant distributed search and indexing, and powers the search
and navigation features of many of the world's largest internet sites.

Solr 4.4 is available for immediate download at:

See the CHANGES.txt file included with the release for a full list of

Solr 4.4 Release Highlights:

* Solr indexes and transaction logs may stored in HDFS with full read/write

* Schemaless mode: Added support for a mode that requires no up-front schema
  modifications, in which previously unknown fields' types are guessed based
  on the values in added/updated documents, and are then added to the schema
  prior to processing the update.  Note that the below-described features
  are also useful independently from schemaless mode operation.   
  * New Parse{Date,Integer,Long,Float,Double,Boolean}UpdateProcessorFactory
    classes parse/guess the field value class for String-valued and unknown
  * New AddSchemaFieldsUpdateProcessor: Automatically add new fields to the
    schema when adding/updating documents with unknown fields. Custom rules
    map field value class(es) to schema fieldTypes.
  * A new schemaless mode example configuration, using the above-described 
    field-value-class-guessing and unknown-field-schema-addition features,
    is provided at solr/example/example-schemaless/.

* Core Discovery mode: A new solr.xml format which does not store core
  information, but instead searches for files named '' in
  the filesystem which tell Solr all the details about that core.  The main
  example and the schemaless example both use this new format.

* Schema REST API: Add support for creating copy fields.

* A merged segment warmer may now be plugged into solrconfig.xml. 

* New MaxScoreQParserPlugin: Return max() instead of sum() of terms.

* Binary files are now supported in ZooKeeper.

* SolrJ's SolrPing object has new methods for ping, enable, and disable.

* The Admin UI now supports adding documents to Solr.

* Added a PUT command to the Solr ZkCli tool.

* New "deleteshard" collections API that unloads all replicas of a given
  shard and then removes it from the cluster state. It will remove only
  those shards which are INACTIVE or have no range.

* The Overseer can now optionally assign generic node names so that
  new addresses can host shards without naming confusion.

* The CSV Update Handler now supports optionally adding the line number/
  row id to a document.

* Added a new system wide info admin handler that exposes the system info
  that could previously only be retrieved using a SolrCore.

Solr 4.4 also includes many other new features as well as numerous
optimizations and bugfixes.

Please report any feedback to the mailing lists 

In the coming days, we will also be announcing the first official Solr 
Reference Guide available for download.  In the meantime, users are 
encouraged to browse the online version and post comments and suggestions on 
the documentation:

Note: The Apache Software Foundation uses an extensive mirroring network
for distributing releases.  It is possible that the mirror you are using
may not have replicated the release yet.  If that is the case, please
try another mirror.  This also goes for Maven access.
  • No labels