[ANNOUNCE] Apache Solr 7.0.0 released

[Anshum Gupta <an...@apache.org>]

20 September 2017, Apache Solr™ 7.0.0 available

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 7.0.0 is available for immediate download at:
http://lucene.apache.org/solr/mirrors-solr-latest-redir.html

See http://lucene.apache.org/solr/7_0_0/changes/Changes.html for a full
list of details.
  * Replica Types - Solr 7 supports different replica types, which handle
updates differently. In addition to pure NRT operation where all replicas
build an index and keep a replication log, you can now also add so called
PULL replicas, achieving the read-speed optimized benefits of a
master/slave setup while at the same time keeping index redundancy.

  * Auto-scaling. Solr can now allocate new replicas to nodes using a new
auto scaling policy framework. This framework will in future releases
enable Solr to move shards around based on load, disk etc.

  * Indented JSON is now the default response format for all APIs, pass
wt=xml and/or indent=off to use the previous unindented XML format.

  * The JSON Facet API now supports two-phase facet refinement to ensure
accurate counts and statistics for facet buckets returned in distributed
mode.

  * Streaming Expressions adds a new statistical programming syntax for the
statistical analysis of sql queries, random samples, time series and graph
result sets.

  * Analytics Component version 2.0, which now supports distributed
collections, expressions over multivalued fields, a new JSON request
language, and more.

  * The new v2 API, exposed at /api/ and also supported via SolrJ, is now
the preferred API, but /solr/ continues to work.

  * A new '_default' configset is used if no config is specified at
collection creation. The data-driven functionality of this configset
indexes strings as analyzed text while at the same time copying to a
'*_str' field suitable for faceting.

  * Solr 7 is tested with and verified to support Java 9.

Being a major release, Solr 7 removes many deprecated APIs, changes various
parameter defaults and behavior. Some changes may require a re-index of
your content. You are thus encouraged to thoroughly read the "Upgrade
Notes" at http://lucene.apache.org/solr/7_0_0/changes/Changes.html or in
the CHANGES.txt file accompanying the release.

Solr 7.0.0 also includes many other new features as well as numerous
optimizations and bugfixes of the corresponding Apache Lucene release.

Please report any feedback to the mailing lists (
http://lucene.apache.org/solr/discussion.html)

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.

Anshum Gupta