Breaking changes:

• Cloud AWS: Change endpoint parameters to distinguish between ec2 and s3 (#574)
• Memory Index Store: Separate to two buffer size types, and fix bugs (#577)

New features:

• Index Templates (#540)
• Parent / Child Support (#553)
• Add terms/in query, alias terms filter to be in filter as well (#557)
• Analyze API: An API to analyzer custom text based on an optional analyzer (#529)
• Highlighting: Automatically use the field values extracted from _source if not stored explicitly in the mapping (#561)
• Index / Index Template: Allow to define _default_ mapping (#542)

Enhancements:

• Support date and ip types for numeric_range filter (#530)
• Reduce the number of concurrent recoveries per node to 2 from number_of_processors (#543)
• Upgrade to Lucene 3.0.3 (#549)
• Disable calling mlockall by default, can be enabled by setting bootstrap.mlockall to true (#567)
• Bulk API: Add refresh flag (#535)
• Create Index API: Allow to provide mappings (#541)
• EC2 Discover: Support filtering instances by tags (#551)
• Index Setting: Add index.refresh_interval to simplify setting instead of “index.engine.robin.refresh_interval@ (still works) (”#546″:http://github.com/elasticsearch/elasticsearch/issues/issue/546)
• Java TransportClient: By default, don’t sniff other nodes and use addresses provided as is (#565)
• Recovery: Allow to control concurrent_streams (per node) during recovery (#563)
• Search API:
  • Add how long the search took (in milliseconds) (#536)
  • Optimize single shard search to QUERY_AND_FETCH from any other search type (#547)
  • Allow to pass &fields= without any fields to cause only id and type to be returned (#572)
• Search Fields: If a field is not stored, automatically extract it from _source (without the need for _source prefix) (#562)
• Search Scroll API: Allow to provide the scroll id as the body of the scroll request (#545)
• Tcp Transport: Connection pool between nodes and different connection types (#564)
• Transport: Increase the default transport.tcp.connect_timeout from 1s to 30s, also, add network.tcp.connect_timeout to conform with other common network settings (#576)

Bug fixes:

• Highlighting bug where fragments are broken when number_of_fragments is 0 (#479)
• Scrolling issues (#136)
• log4j syslog appender don’t load (#527)
• Aliased analyzers cause index deletion / cleanup failure (#555)
• Geo search fails to find some docs when wrapping over IDL (#559)
• Close API might cause index data to be wiped (#560)
• Excessive mapping parsing when cluster state changes (#575)
• Delete Mapping API: Wrongly deleting existing mapping information (#531)
• Java Search API: Passing a the query as json fails (#568)
• Query Cache: Invalidate the query cache when mappings change (#532)

Internal:

• upgrade to mvel 2.0.19
• add freebsd sigar libs
• upgrade to tika 0.8
• upgrade to jackson 1.6.3
• upgrade to aws java sdk 1.1.1
• upgrade twitter4j to 2.1.7
• upgrade to gradle 0.9
• upgrade to groovy 1.7.6
• upgrade to rabbitmq client 2.2.0
• upgrade to jython 2.5.2rc2