COMPAT locale provider will be removed in a future release

Description:
From JDK21 onwards a new warning has started to come, "WARNING: COMPAT locale provider will be removed in a future release". So, we have to avoid usage of COMPAT provider.
We were setting exlpicitly to COMPAT locale provider in couple of places, this change is to convert COMPAT to CLDR locale provider.
After this change, couple of tests started to fail becasue some locale data has minor changes in CLDR compared to COMPAT.
For example, day and month short names of GERMAN "de" locale are different in CLDR and COMPAT, just need to add a . in the end for CLDR.

Resolves opensearch-project#11550
Signed-off-by: Abdul Muneer Kolarkunnu <[email protected]>

CHANGELOG.md

@@ -33,6 +33,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Bump `org.apache.xmlbeans:xmlbeans` from 5.2.0 to 5.2.1 ([#13839](https://github.com/opensearch-project/OpenSearch/pull/13839))
 
 ### Changed
+- Changed locale provider from COMPAT to CLDR ([#11550]())
 - Add ability for Boolean and date field queries to run when only doc_values are enabled ([#11650](https://github.com/opensearch-project/OpenSearch/pull/11650))
 - Refactor implementations of query phase searcher, allow QueryCollectorContext to have zero collectors ([#13481](https://github.com/opensearch-project/OpenSearch/pull/13481))
 - Adds support to inject telemetry instances to plugins ([#13636](https://github.com/opensearch-project/OpenSearch/pull/13636))

buildSrc/src/main/java/org/opensearch/gradle/OpenSearchTestBasePlugin.java

@@ -110,7 +110,7 @@ public void execute(Task t) {
                     if (BuildParams.getRuntimeJavaVersion() == JavaVersion.VERSION_1_8) {
                         test.systemProperty("java.locale.providers", "SPI,JRE");
                     } else {
-                        test.systemProperty("java.locale.providers", "SPI,COMPAT");
+                        test.systemProperty("java.locale.providers", "SPI,CLDR");
                         if (test.getJavaVersion().compareTo(JavaVersion.VERSION_17) < 0) {
                             test.jvmArgs("--illegal-access=warn");
                         }

distribution/tools/launchers/src/main/java/org/opensearch/tools/launchers/SystemJvmOptions.java

@@ -105,13 +105,8 @@ private static String javaLocaleProviders() {
            SPI setting is used to allow loading custom CalendarDataProvider
            in jdk8 it has to be loaded from jre/lib/ext,
            in jdk9+ it is already within ES project and on a classpath
-
-           Due to internationalization enhancements in JDK 9 OpenSearch need to set the provider to COMPAT otherwise time/date
-           parsing will break in an incompatible way for some date patterns and locales.
-           //TODO COMPAT will be deprecated in at some point, see please https://bugs.openjdk.java.net/browse/JDK-8232906
-          See also: documentation in <code>server/org.opensearch.common.time.IsoCalendarDataProvider</code>
          */
-        return "-Djava.locale.providers=SPI,COMPAT";
+        return "-Djava.locale.providers=SPI,CLDR";
     }
 
 }

gradle/ide.gradle

@@ -81,7 +81,7 @@ if (System.getProperty('idea.active') == 'true') {
         }
         runConfigurations {
           defaults(JUnit) {
-            vmParameters = '-ea -Djava.locale.providers=SPI,COMPAT'
+            vmParameters = '-ea -Djava.locale.providers=SPI,CLDR'
             if (BuildParams.runtimeJavaVersion > JavaVersion.VERSION_17) {
               vmParameters += ' -Djava.security.manager=allow'
             }

server/src/internalClusterTest/java/org/opensearch/search/query/SearchQueryIT.java

@@ -1914,14 +1914,8 @@ public void testRangeQueryWithTimeZone() throws Exception {
      * Test range with a custom locale, e.g. "de" in this case. Documents here mention the day of week
      * as "Mi" for "Mittwoch (Wednesday" and "Do" for "Donnerstag (Thursday)" and the month in the query
      * as "Dez" for "Dezember (December)".
-     * Note: this test currently needs the JVM arg `-Djava.locale.providers=SPI,COMPAT` to be set.
-     * When running with gradle this is done implicitly through the BuildPlugin, but when running from
-     * an IDE this might need to be set manually in the run configuration. See also CONTRIBUTING.md section
-     * on "Configuring IDEs And Running Tests".
      */
     public void testRangeQueryWithLocaleMapping() throws Exception {
-        assert ("SPI,COMPAT".equals(System.getProperty("java.locale.providers"))) : "`-Djava.locale.providers=SPI,COMPAT` needs to be set";
-
         assertAcked(
             prepareCreate("test").setMapping(
                 jsonBuilder().startObject()
@@ -1938,17 +1932,21 @@ public void testRangeQueryWithLocaleMapping() throws Exception {
 
         indexRandom(
             true,
-            client().prepareIndex("test").setId("1").setSource("date_field", "Mi, 06 Dez 2000 02:55:00 -0800"),
-            client().prepareIndex("test").setId("2").setSource("date_field", "Do, 07 Dez 2000 02:55:00 -0800")
+            client().prepareIndex("test").setId("1").setSource("date_field", "Mi., 06 Dez. 2000 02:55:00 -0800"),
+            client().prepareIndex("test").setId("2").setSource("date_field", "Do., 07 Dez. 2000 02:55:00 -0800")
         );
 
         SearchResponse searchResponse = client().prepareSearch("test")
-            .setQuery(QueryBuilders.rangeQuery("date_field").gte("Di, 05 Dez 2000 02:55:00 -0800").lte("Do, 07 Dez 2000 00:00:00 -0800"))
+            .setQuery(
+                QueryBuilders.rangeQuery("date_field").gte("Di., 05 Dez. 2000 02:55:00 -0800").lte("Do., 07 Dez. 2000 00:00:00 -0800")
+            )
             .get();
         assertHitCount(searchResponse, 1L);
 
         searchResponse = client().prepareSearch("test")
-            .setQuery(QueryBuilders.rangeQuery("date_field").gte("Di, 05 Dez 2000 02:55:00 -0800").lte("Fr, 08 Dez 2000 00:00:00 -0800"))
+            .setQuery(
+                QueryBuilders.rangeQuery("date_field").gte("Di., 05 Dez. 2000 02:55:00 -0800").lte("Fr., 08 Dez. 2000 00:00:00 -0800")
+            )
             .get();
         assertHitCount(searchResponse, 2L);
     }

server/src/test/java/org/opensearch/index/mapper/DateFieldMapperTests.java

@@ -208,7 +208,7 @@ public void testChangeLocale() throws IOException {
             fieldMapping(b -> b.field("type", "date").field("format", "E, d MMM yyyy HH:mm:ss Z").field("locale", "de"))
         );
 
-        mapper.parse(source(b -> b.field("field", "Mi, 06 Dez 2000 02:55:00 -0800")));
+        mapper.parse(source(b -> b.field("field", "Mi., 06 Dez. 2000 02:55:00 -0800")));
     }
 
     public void testNullValue() throws IOException {