Upgrade Notes:
- Upgrading from 0.19 requires a full cluster restart.
Breaking changes:
- Deprecate Experimental Snappy Support (#2459)
- Deprecate Shared Gateway (#2458)
- Mapping: string mapping to automatically set omit_norms to true and index_options to docs when setting index to not_analyzed (#2349)
- Shard Allocation: add index.routing.allocation.require…. and cluster.routing.allocation.require…. setting (#2404)
New features:
- Indexing Slow Log (#2457)
Enhancements:
- Expose ES version in node info api (#2466)
- Expose fragmenter option for plain highlighter (#2465)
- Upgrade to Netty 3.5.11 (#2456)
- Add types and stats to search slow log (#2455)
- Cannot change MatchQuery behaviour with 0 terms (#2429)
- Upgrade to netty 3.5.10 (#2399)
- Upgrade to Netty 3.5.9 (#2377)
- Upsert doesn’t return fields (#2362)
- Node Stats: Add largest thread pool count per thread pool stats (#2382)
Bug fixes:
- Wildcard query on non existent field matches all documents. (#2461)
- The relevancy score in explanation of custom_filters_query doesn’t match the actual score (#2441)
- Match query should fail when trying to provide several fields in its simplified form (#2432)
- Setting logger levels using cluster update settings does not work (#2428)
- NullPointerException with prefix query (#2408)
- Deriving the REST status code from a failure can, very rarely, cause an infinite loop (#2402)
- Adding a type with _source or _all enabled fails, when these are disabled in index (#2394)
- Ignore indices not set when using multi search api. (#2380)
- path_match support in dynamic templates is incorrect (#2371)
- Deleting a non-existent warmer causes ES to hang (#2363)
- MapperParsingException on percolation with _size enabled (#2352)
- Multi Match: tie_breaker should allow for floating point value (#2397)
- With cache turned off I’m getting the following error: nested: ClassCastException[org.apache.lucene.util.FixedBitSet cannot be cast to org.elasticsearch.common.lucene.docset.FixedBitDocSet] (#2340)