Issues

Expose Lucene's low-level IndexReader/IndexWriter through API

Type name mapping relying on a "constant_keyword" field - non-OSS ES only

Tracing indexing requests and search queries

Allow "exists" predicate on object field that has different children when targeting multiple Lucene indexes

Support mass-indexing entities with @IdClass if they have an explicit @DocumentId

Elasticsearch backend ignores truncateAfter() for scrolls

Hibernate Search Indexing Speed Decreasing

Mapping an entity differently based on a discriminator

Range predicate doesn't normalize arguments for text (analyzed) fields with Elasticsearch

Object fields that are both nested and flattened (ES's include_in_parent)

Configurable cache update strategy for entity loading with Hibernate ORM

Projection nesting: preserving the document structure in projections

Custom index settings for Elasticsearch indexes created by Hibernate Search

Projection to a DTO/JavaBean/etc.

Predicate on multiple fields designated by a single label/group name/etc. ("_all", copy_to, ...)

SPI for integrators to provide their own thread pools

Restore support for looking up the capabilities of each field in the metamodel

Support prefix queries in dsl

exists() predicate ignores nested object fields among children of the targeted object field

Filters based exclusively on mapper metadata for @IndexedEmbedded

Support Regexp queries having a regex expression predicate

It is not possible to attach custom implementation of "Query Cache" and "QueryCachingPolicy".

Maximize utilization of database connections during mass indexing

Validate configuration property values more precisely