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@@ -1,8 +1,204 @@
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[[release-notes-8.17.0]]
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== {es} version 8.17.0
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-coming[8.17.0]
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-
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Also see <<breaking-changes-8.17,Breaking changes in 8.17>>.
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+[[license-8.17.0]]
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+[float]
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+=== License changes
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+
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+[float]
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+==== Change to synthetic `_source` licensing
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+
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+Starting with this release, the <<synthetic-source,synthetic `_source`>> feature is available exclusively with the Enterprise subscription. Synthetic `_source` is used in logs data streams (`logsdb` index mode), time series data streams (TSDS, using `time_series` index mode), application performance monitoring (APM), and Universal Profiling.
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+
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+If you are using these capabilities and are not on an Enterprise license, the change will result in increased storage requirements for new data, as the synthetic `_source` setting will be ignored. Existing indices that used synthetic `_source` will remain seamlessly accessible.
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+
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+Refer to the subscription page for https://www.elastic.co/subscriptions/cloud[Elastic Cloud] and {subscriptions}[Elastic Stack/self-managed] for the breakdown of available features and their associated subscription tiers. For further details and subscription options, contact your Elastic sales representative or https://www.elastic.co/contact[contact us].
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+
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+[[bug-8.17.0]]
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+[float]
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+=== Bug fixes
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+
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+Analysis::
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+* Adjust analyze limit exception to be a `bad_request` {es-pull}116325[#116325]
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+
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+CCS::
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+* Fix long metric deserialize & add - auto-resize needs to be set manually {es-pull}117105[#117105] (issue: {es-issue}116914[#116914])
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+
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+CRUD::
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+* Standardize error code when bulk body is invalid {es-pull}114869[#114869]
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+
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+Data streams::
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+* Acquire stats searcher for data stream stats {es-pull}117953[#117953]
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+
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+EQL::
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+* Don't use a `BytesStreamOutput` to copy keys in `BytesRefBlockHash` {es-pull}114819[#114819] (issue: {es-issue}114599[#114599])
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+
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+ES|QL::
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+* Added stricter range type checks and runtime warnings for ENRICH {es-pull}115091[#115091] (issues: {es-issue}107357[#107357], {es-issue}116799[#116799])
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+* Don't return TEXT type for functions that take TEXT {es-pull}114334[#114334] (issues: {es-issue}111537[#111537], {es-issue}114333[#114333])
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+* ESQL: Fix sorts containing `_source` {es-pull}116980[#116980] (issue: {es-issue}116659[#116659])
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+* ES|QL: Fix stats by constant expression {es-pull}114899[#114899]
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+* Fix BWC for ES|QL cluster request {es-pull}117865[#117865]
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+* Fix CCS exchange when multi cluster aliases point to same cluster {es-pull}117297[#117297]
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+* Fix COUNT filter pushdown {es-pull}117503[#117503] (issue: {es-issue}115522[#115522])
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+* Fix NPE in `EnrichLookupService` on mixed clusters with <8.14 versions {es-pull}116583[#116583] (issues: {es-issue}116529[#116529], {es-issue}116544[#116544])
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+* Fix stats by constant expresson with alias {es-pull}117551[#117551]
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+* Fix validation of SORT by aggregate functions {es-pull}117316[#117316]
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+* Fixing remote ENRICH by pushing the Enrich inside `FragmentExec` {es-pull}114665[#114665] (issue: {es-issue}105095[#105095])
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+* Ignore cancellation exceptions {es-pull}117657[#117657]
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+* Limit size of `Literal#toString` {es-pull}117842[#117842]
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+* Opt into extra data stream resolution {es-pull}118378[#118378]
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+* Use `SearchStats` instead of field.isAggregatable in data node planning {es-pull}115744[#115744] (issue: {es-issue}115737[#115737])
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+* [ESQL] Fix Binary Comparisons on Date Nanos {es-pull}116346[#116346]
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+* [ES|QL] To_DatePeriod and To_TimeDuration return better error messages on `union_type` fields {es-pull}114934[#114934]
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+
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+Infra/CLI::
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+* Fix NPE on plugin sync {es-pull}115640[#115640] (issue: {es-issue}114818[#114818])
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+
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+Ingest Node::
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+* Fix enrich cache size setting name {es-pull}117575[#117575]
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+* Fix log message format bugs {es-pull}118354[#118354]
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+* Fix reconstituting version string from components {es-pull}117213[#117213] (issue: {es-issue}116950[#116950])
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+* Reducing error-level stack trace logging for normal events in `GeoIpDownloader` {es-pull}114924[#114924]
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+
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+License::
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+* Distinguish `LicensedFeature` by family field {es-pull}116809[#116809]
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+
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+Logs::
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+* Prohibit changes to index mode, source, and sort settings during resize {es-pull}115812[#115812]
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+
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+Machine Learning::
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+* Fix deberta tokenizer bug caused by bug in normalizer {es-pull}117189[#117189]
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+* Fix for Deberta tokenizer when input sequence exceeds 512 tokens {es-pull}117595[#117595]
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+* Hides `hugging_face_elser` service from the `GET _inference/_services API` {es-pull}116664[#116664] (issue: {es-issue}116644[#116644])
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+* Mitigate IOSession timeouts {es-pull}115414[#115414] (issues: {es-issue}114385[#114385], {es-issue}114327[#114327], {es-issue}114105[#114105], {es-issue}114232[#114232])
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+* Propagate scoring function through random sampler {es-pull}116957[#116957] (issue: {es-issue}110134[#110134])
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+* Wait for the worker service to shutdown before closing task processor {es-pull}117920[#117920] (issue: {es-issue}117563[#117563])
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+
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+Mapping::
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+* Address mapping and compute engine runtime field issues {es-pull}117792[#117792] (issue: {es-issue}117644[#117644])
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+* Always Emit Inference ID in Semantic Text Mapping {es-pull}117294[#117294]
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+* Fix concurrency issue with `ReinitializingSourceProvider` {es-pull}118370[#118370] (issue: {es-issue}118238[#118238])
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+* Fix false positive date detection with trailing dot {es-pull}116953[#116953] (issue: {es-issue}116946[#116946])
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+* Parse the contents of dynamic objects for [subobjects:false] {es-pull}117762[#117762] (issue: {es-issue}117544[#117544])
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+
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+Network::
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+* Use underlying `ByteBuf` `refCount` for `ReleasableBytesReference` {es-pull}116211[#116211]
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+
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+Ranking::
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+* Fix for propagating filters from compound to inner retrievers {es-pull}117914[#117914]
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+
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+Search::
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+* Add missing `async_search` query parameters to rest-api-spec {es-pull}117312[#117312]
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+* Don't skip shards in coord rewrite if timestamp is an alias {es-pull}117271[#117271]
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+* Fields caps does not honour ignore_unavailable {es-pull}116021[#116021] (issue: {es-issue}107767[#107767])
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+* _validate does not honour ignore_unavailable {es-pull}116656[#116656] (issue: {es-issue}116594[#116594])
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+
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+Vector Search::
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+* Correct bit * byte and bit * float script comparisons {es-pull}117404[#117404]
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+
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+Watcher::
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+* Watch Next Run Interval Resets On Shard Move or Node Restart {es-pull}115102[#115102] (issue: {es-issue}111433[#111433])
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+
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+[[deprecation-8.17.0]]
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+[float]
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+=== Deprecations
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+
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+Infra/REST API::
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+* Add a basic deprecation warning that the JSON format for non-detailed error responses is changing in v9 {es-pull}114739[#114739] (issue: {es-issue}89387[#89387])
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+
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+Mapping::
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+* Deprecate `_source.mode` in mappings {es-pull}116689[#116689]
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+
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+[[enhancement-8.17.0]]
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+[float]
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+=== Enhancements
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+
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+Authorization::
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+* Add a `monitor_stats` privilege and allow that privilege for remote cluster privileges {es-pull}114964[#114964]
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+
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+Data streams::
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+* Adding a deprecation info API warning for data streams with old indices {es-pull}116447[#116447]
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+
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+ES|QL::
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+* Add ES|QL `bit_length` function {es-pull}115792[#115792]
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+* ESQL: Honor skip_unavailable setting for nonmatching indices errors at planning time {es-pull}116348[#116348] (issue: {es-issue}114531[#114531])
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+* ESQL: Remove parent from `FieldAttribute` {es-pull}112881[#112881]
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+* ESQL: extract common filter from aggs {es-pull}115678[#115678]
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+* ESQL: optimise aggregations filtered by false/null into evals {es-pull}115858[#115858]
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+* ES|QL CCS uses `skip_unavailable` setting for handling disconnected remote clusters {es-pull}115266[#115266] (issue: {es-issue}114531[#114531])
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+* ES|QL: add metrics for functions {es-pull}114620[#114620]
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+* Esql Enable Date Nanos (tech preview) {es-pull}117080[#117080]
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+* [ES|QL] Implicit casting string literal to intervals {es-pull}115814[#115814] (issue: {es-issue}115352[#115352])
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+
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+Indices APIs::
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+* Ensure class resource stream is closed in `ResourceUtils` {es-pull}116437[#116437]
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+
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+Inference::
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+* Add version prefix to Inference Service API path {es-pull}117366[#117366]
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+* Update sparse text embeddings API route for Inference Service {es-pull}118368[#118368]
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+
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+Infra/Core::
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+* Support for unsigned 64 bit numbers in Cpu stats {es-pull}114681[#114681] (issue: {es-issue}112274[#112274])
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+
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+Ingest Node::
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+* Adding support for additional mapping to simulate ingest API {es-pull}114742[#114742]
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+* Adding support for simulate ingest mapping adddition for indices with mappings that do not come from templates {es-pull}115359[#115359]
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+
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+Logs::
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+* Add logsdb telemetry {es-pull}115994[#115994]
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+* Add num docs and size to logsdb telemetry {es-pull}116128[#116128]
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+* Feature: re-structure document ID generation favoring _id inverted index compression {es-pull}104683[#104683]
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+
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+Machine Learning::
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+* Add special case for elastic reranker in inference API {es-pull}116962[#116962]
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+* Adding inference endpoint validation for `AzureAiStudioService` {es-pull}113713[#113713]
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+* Adds support for `input_type` field to Vertex inference service {es-pull}116431[#116431]
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+* Enable built-in Inference Endpoints and default for Semantic Text {es-pull}116931[#116931]
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+* Increase default `queue_capacity` to 10_000 and decrease max `queue_capacity` to 100_000 {es-pull}115041[#115041]
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+* [Inference API] Add API to get configuration of inference services {es-pull}114862[#114862]
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+* [Inference API] Improve chunked results error message {es-pull}115807[#115807]
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+
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+Recovery::
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+* Attempt to clean up index before remote transfer {es-pull}115142[#115142] (issue: {es-issue}104473[#104473])
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+
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+Relevance::
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+* Add query rules retriever {es-pull}114855[#114855]
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+
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+Search::
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+* Add Search Phase APM metrics {es-pull}113194[#113194]
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+* Add `docvalue_fields` Support for `dense_vector` Fields {es-pull}114484[#114484] (issue: {es-issue}108470[#108470])
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+* Add initial support for `semantic_text` field type {es-pull}113920[#113920]
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+* Adds access to flags no_sub_matches and no_overlapping_matches to hyphenation-decompounder-tokenfilter {es-pull}115459[#115459] (issue: {es-issue}97849[#97849])
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+* Better sizing `BytesRef` for Strings in Queries {es-pull}115655[#115655]
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+* Enable `_tier` based coordinator rewrites for all indices (not just mounted indices) {es-pull}115797[#115797]
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+
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+Vector Search::
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+* Add support for bitwise inner-product in painless {es-pull}116082[#116082]
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+* Improve halfbyte transposition performance, marginally improving bbq performance {es-pull}117350[#117350]
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+
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+[[feature-8.17.0]]
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+[float]
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+=== New features
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+
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+Data streams::
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+* Add default ILM policies and switch to ILM for apm-data plugin {es-pull}115687[#115687]
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+
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+ES|QL::
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+* Add support for `BYTE_LENGTH` scalar function {es-pull}116591[#116591]
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+* Esql/lookup join grammar {es-pull}116515[#116515]
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+* Remove snapshot build restriction for match and qstr functions {es-pull}114482[#114482]
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+
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+Search::
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+* ESQL - Add match operator (:) {es-pull}116819[#116819]
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+
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+[[upgrade-8.17.0]]
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+[float]
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+=== Upgrades
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+
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+Security::
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+* Upgrade Bouncy Castle FIPS dependencies {es-pull}112989[#112989]
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+
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elasticsearchmachine