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Elasticsearch version 8.15.2

Also see Breaking changes in 8.15.

Bug fixes

Authorization

Fix remote cluster credential secure settings reload #111535

ES|QL

ESQL: Don’t mutate the BoolQueryBuilder in plan #111519
ES|QL: Fix ResolvedEnrichPolicy serialization (bwc) in v 8.15 #112985 (issue: #112968)
Fix union-types where one index is missing the field #111932 (issue: #111912)
Support widening of numeric types in union-types #112610 (issue: #111277)
Shorten error messages for UnsupportedAttributes #112819
Reduce memory footprint of serialized query execution plans #112865

Infra/Core

JSON parse failures should be 4xx codes #112703
Json parsing exceptions should not cause 500 errors #111548 (issue: #111542)
Make sure file accesses in DnRoleMapper are done in stack frames with permissions #112400

Ingest Node

Fix missing header in put_geoip_database JSON spec #112581

Logs

Fix encoding of dynamic arrays in ignored source #112713

Mapping

Full coverage of ECS by ecs@mappings when date_detection is disabled #112444 (issue: #112398)

Search

Fix parsing error in _terms_enum API #112872 (issue: #94378)

Security

Allowlist tracestate header on remote server port #112649

Vector Search

Fix NPE in dense_vector stats #112720

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https://www.elastic.co/guide/en/elasticsearch/reference/8.17/release-notes-8.15.2.html