The main highlight is the removal of the reclaim_deletes_weight in the TieredMergePolicy.
The es setting index.merge.policy.reclaim_deletes_weight is deprecated in this commit and the value is ignored. The new merge policy setting setDeletesPctAllowed should be added in a follow up.
Upgrade to lucene-7.4.0-snapshot-1ed95c097b
This version contains:
* An Analyzer for Korean
* An IntervalQuery and IntervalsSource that retrieve minimum intervals of positional queries.
* A new API to retrieve matches (offsets and positions) of a query for a single document.
* Support for soft deletes in the index writer.
* A fixed shingle filter that handles index time synonyms.
* Support for emoji sequence in ICUTokenizer (with an upgrade to icu 61.1)
* Upgrade icu4j for the ICU analysis plugin to 59.1
Lucene upgraded to 59.1 so we should use the same.
Closes#21425
* Add breaking change for the icu upgrade
Adds a new "icu_collation" field type that exposes lucene's
ICUCollationDocValuesField. ICUCollationDocValuesField is the replacement
for ICUCollationKeyFilter which has been deprecated since Lucene 5.
Transitive dependencies can be confusing and hard to deal with when
conflicts arise between them. This change removes transitive
dependencies from elasticsearch, and forces any dependency conflicts to
be resolved manually, instead of automatically by gradle.
closes#14627
Jim Ferenczi
Andy Bristol
Matt Weber
Nik Everett
Ryan Ernst