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Forward port release notes for v8.17.5 (#127024)
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‎docs/reference/migration/index.asciidoc

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include::migration_intro.asciidoc[]
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* <<migrating-9.1,Migrating to 9.1>>
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* <<migrating-9.0,Migrating to 9.0>>
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include::migrate_9_1.asciidoc[]
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include::migrate_9_0.asciidoc[]
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‎docs/reference/migration/migrate_8_17.asciidoc

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[[migrating-8.17]]
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== Migrating to 8.17
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++++
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<titleabbrev>8.17</titleabbrev>
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++++
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This section discusses the changes that you need to be aware of when migrating
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your application to {es} 8.17.
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See also <<release-highlights>> and <<es-release-notes>>.
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[discrete]
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[[breaking-changes-8.17]]
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=== Breaking changes
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There are no breaking changes in {es} 8.17.
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[discrete]
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[[deprecated-8.17]]
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=== Deprecations
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The following functionality has been deprecated in {es} 8.17
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and will be removed in a future version.
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While this won't have an immediate impact on your applications,
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we strongly encourage you to take the described steps to update your code
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after upgrading to 8.17.
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To find out if you are using any deprecated functionality,
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enable <<deprecation-logging, deprecation logging>>.
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[discrete]
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[[deprecations_817_mapping]]
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==== Mapping deprecations
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[[deprecate_source_mode_in_mappings]]
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.Deprecate `_source.mode` in mappings
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[%collapsible]
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====
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*Details* +
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Configuring `_source.mode` in mappings is deprecated and will be removed in future versions. Use `index.mapping.source.mode` index setting instead.
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*Impact* +
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Use `index.mapping.source.mode` index setting instead
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====
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[discrete]
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[[deprecations_817_rest_api]]
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==== REST API deprecations
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[[format_of_non_detailed_error_responses_changing_in_v9]]
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.The format of non-detailed error responses is changing in v9
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[%collapsible]
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====
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*Details* +
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When an error occurs when processing a request, Elasticsearch returns information on that error in the REST response.
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If `http:detailed_errors.enabled: false` is specified in node settings with the v8 REST API and below,
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the format of this response changes significantly.
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Starting with the v9 REST API, the JSON structure of responses with errors when the `http.detailed_errors.enabled: false` option is set
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will be the same as when detailed errors are enabled (which is the default).
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To keep using the existing format for non-detailed error responses, use the v8 REST API.
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*Impact* +
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If you have set `http.detailed_errors.enabled: false` (the default is `true`)
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the structure of JSON when any exceptions occur will change with the v9 REST API.
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To keep using the existing format, use the v8 REST API.
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====
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‎docs/reference/release-notes.asciidoc

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[[es-release-notes]]
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= Release notes
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[partintro]
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--
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This section summarizes the changes in each release.
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* <<release-notes-9.1.0>>
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* <<release-notes-9.0.0>>
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* <<release-notes-9.0.0-rc1>>
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* <<release-notes-9.0.0-beta1>>
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--
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include::release-notes/9.1.0.asciidoc[]
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include::release-notes/9.0.0.asciidoc[]
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include::release-notes/9.0.0-rc1.asciidoc[]
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include::release-notes/9.0.0-beta1.asciidoc[]
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‎docs/reference/release-notes/8.17.5.asciidoc

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[[release-notes-8.17.5]]
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== {es} version 8.17.5
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Also see <<breaking-changes-8.17,Breaking changes in 8.17>>.
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[[bug-8.17.5]]
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[float]
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=== Bug fixes
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Authentication::
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* Fix NPE for missing Content Type header in OIDC Authenticator {es-pull}126191[#126191]
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ES|QL::
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* Fix `ReplaceMissingFieldsWithNull` {es-pull}125764[#125764] (issues: {es-issue}126036[#126036], {es-issue}121754[#121754], {es-issue}126030[#126030])
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* Fix usage of already released null block in `ValueSourceReaderOperator` {es-pull}126411[#126411] (issue: {es-issue}125850[#125850])
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Machine Learning::
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* Fixing bedrock event executor terminated cache issue {es-pull}118177[#118177] (issue: {es-issue}117916[#117916])
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Search::
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* Re-enable parallel collection for field sorted top hits {es-pull}125916[#125916]
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* Support indices created in ESv6 and updated in ESV7 using different LuceneCodecs as archive in current version. {es-pull}125389[#125389]
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TLS::
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* Set `keyUsage` for generated HTTP certificates and self-signed CA {es-pull}126376[#126376] (issue: {es-issue}117769[#117769])
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‎docs/reference/release-notes/highlights.asciidoc

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[[release-highlights]]
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== What's new in {minor-version}
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coming::[{minor-version}]
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Here are the highlights of what's new and improved in {es} {minor-version}!
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ifeval::["{release-state}"!="unreleased"]
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For detailed information about this release, see the <<es-release-notes>> and
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<<breaking-changes>>.
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// Add previous release to the list
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Other versions:
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{ref-bare}/9.0/release-highlights.html[9.0]
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endif::[]
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// The notable-highlights tag marks entries that
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// should be featured in the Stack Installation and Upgrade Guide:
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// tag::notable-highlights[]
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// [discrete]
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// === Heading
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//
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// Description.
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// end::notable-highlights[]
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