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Merged
merged 4 commits into from
Oct 3, 2024
Merged

Copy 8.16 CLDR migration notes to main #113954

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4cd758f
Copy 8.16 CLDR migration notes to main
thecoop Oct 2, 2024
afcc065
Change link to one present on v9
thecoop Oct 3, 2024
85a6780
Merge branch 'main' into cldr-migration-8.16
thecoop Oct 3, 2024
4503212
Merge remote-tracking branch 'upstream/main' into cldr-migration-8.16
thecoop Oct 3, 2024
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19 changes: 18 additions & 1 deletion docs/reference/migration/migrate_8_16.asciidoc
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Expand Up @@ -16,5 +16,22 @@ coming::[8.16.0]
[[breaking-changes-8.16]]
=== Breaking changes

There are no breaking changes in {es} 8.16.
The following changes in {es} 8.16 might affect your applications
and prevent them from operating normally.
Before upgrading to 8.16, review these changes and take the described steps
to mitigate the impact.

[discrete]
[[breaking_816_locale_change]]
==== JDK locale database change

{es} 8.16 changes the version of the JDK that is included from version 22 to version 23. This changes
the locale database that is used by Elasticsearch from the _COMPAT_ database to the _CLDR_ database.
This can result in significant changes to custom textual date field formats,
and calculations for custom week-date date fields.

For more information see <<custom-date-format-locales,custom date formats>>.

If you run {es} 8.16 on JDK version 22 or below, it will use the _COMPAT_ locale database
to match the behavior of 8.15. However, please note that starting with {es} 9.0,
{es} will use the _CLDR_ database regardless of JDK version it is run on.
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