Remove endpoint for freezing indices (#78918)

client/rest-high-level/src/test/java/org/elasticsearch/client/IndicesClientIT.java

@@ -42,7 +42,6 @@
 import org.elasticsearch.action.support.WriteRequest;
 import org.elasticsearch.action.support.broadcast.BroadcastResponse;
 import org.elasticsearch.action.support.master.AcknowledgedResponse;
-import org.elasticsearch.client.core.ShardsAcknowledgedResponse;
 import org.elasticsearch.client.indices.AnalyzeRequest;
 import org.elasticsearch.client.indices.AnalyzeResponse;
 import org.elasticsearch.client.indices.CloseIndexRequest;
@@ -58,7 +57,6 @@
 import org.elasticsearch.client.indices.DeleteAliasRequest;
 import org.elasticsearch.client.indices.DeleteComposableIndexTemplateRequest;
 import org.elasticsearch.client.indices.DeleteDataStreamRequest;
-import org.elasticsearch.client.indices.FreezeIndexRequest;
 import org.elasticsearch.client.indices.GetComposableIndexTemplateRequest;
 import org.elasticsearch.client.indices.GetComposableIndexTemplatesResponse;
 import org.elasticsearch.client.indices.GetDataStreamRequest;
@@ -80,7 +78,6 @@
 import org.elasticsearch.client.indices.ReloadAnalyzersResponse;
 import org.elasticsearch.client.indices.SimulateIndexTemplateRequest;
 import org.elasticsearch.client.indices.SimulateIndexTemplateResponse;
-import org.elasticsearch.client.indices.UnfreezeIndexRequest;
 import org.elasticsearch.client.indices.rollover.RolloverRequest;
 import org.elasticsearch.client.indices.rollover.RolloverResponse;
 import org.elasticsearch.cluster.metadata.AliasMetadata;
@@ -95,16 +92,16 @@
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.unit.ByteSizeUnit;
 import org.elasticsearch.common.unit.ByteSizeValue;
-import org.elasticsearch.core.TimeValue;
-import org.elasticsearch.xcontent.XContentBuilder;
-import org.elasticsearch.xcontent.XContentType;
-import org.elasticsearch.xcontent.json.JsonXContent;
 import org.elasticsearch.common.xcontent.support.XContentMapValues;
+import org.elasticsearch.core.TimeValue;
 import org.elasticsearch.index.IndexSettings;
 import org.elasticsearch.index.query.QueryBuilder;
 import org.elasticsearch.index.query.QueryBuilders;
 import org.elasticsearch.rest.RestStatus;
 import org.elasticsearch.rest.action.admin.indices.RestPutIndexTemplateAction;
+import org.elasticsearch.xcontent.XContentBuilder;
+import org.elasticsearch.xcontent.XContentType;
+import org.elasticsearch.xcontent.json.JsonXContent;
 
 import java.io.IOException;
 import java.util.Arrays;
@@ -1535,24 +1532,6 @@ public void testAnalyze() throws Exception {
         assertNotNull(detailsResponse.detail());
     }
 
-    public void testFreezeAndUnfreeze() throws IOException {
-        createIndex("test", Settings.EMPTY);
-        RestHighLevelClient client = highLevelClient();
-
-        final RequestOptions freezeIndexOptions = RequestOptions.DEFAULT.toBuilder()
-            .setWarningsHandler(warnings -> List.of(FROZEN_INDICES_DEPRECATION_WARNING).equals(warnings) == false).build();
-
-        ShardsAcknowledgedResponse freeze = execute(new FreezeIndexRequest("test"), client.indices()::freeze,
-            client.indices()::freezeAsync, freezeIndexOptions);
-        assertTrue(freeze.isShardsAcknowledged());
-        assertTrue(freeze.isAcknowledged());
-
-        ShardsAcknowledgedResponse unfreeze = execute(new UnfreezeIndexRequest("test"), client.indices()::unfreeze,
-            client.indices()::unfreezeAsync, freezeIndexOptions);
-        assertTrue(unfreeze.isShardsAcknowledged());
-        assertTrue(unfreeze.isAcknowledged());
-    }
-
     public void testReloadAnalyzer() throws IOException {
         createIndex("test", Settings.EMPTY);
         RestHighLevelClient client = highLevelClient();

client/rest-high-level/src/test/java/org/elasticsearch/client/documentation/IndicesClientDocumentationIT.java

@@ -55,22 +55,21 @@
 import org.elasticsearch.client.indices.DeleteAliasRequest;
 import org.elasticsearch.client.indices.DeleteComposableIndexTemplateRequest;
 import org.elasticsearch.client.indices.DetailAnalyzeResponse;
-import org.elasticsearch.client.indices.FreezeIndexRequest;
+import org.elasticsearch.client.indices.GetComposableIndexTemplateRequest;
+import org.elasticsearch.client.indices.GetComposableIndexTemplatesResponse;
 import org.elasticsearch.client.indices.GetFieldMappingsRequest;
 import org.elasticsearch.client.indices.GetFieldMappingsResponse;
 import org.elasticsearch.client.indices.GetIndexRequest;
 import org.elasticsearch.client.indices.GetIndexResponse;
-import org.elasticsearch.client.indices.GetComposableIndexTemplateRequest;
 import org.elasticsearch.client.indices.GetIndexTemplatesRequest;
 import org.elasticsearch.client.indices.GetIndexTemplatesResponse;
-import org.elasticsearch.client.indices.GetComposableIndexTemplatesResponse;
 import org.elasticsearch.client.indices.GetMappingsRequest;
 import org.elasticsearch.client.indices.GetMappingsResponse;
 import org.elasticsearch.client.indices.IndexTemplateMetadata;
 import org.elasticsearch.client.indices.IndexTemplatesExistRequest;
 import org.elasticsearch.client.indices.PutComponentTemplateRequest;
-import org.elasticsearch.client.indices.PutIndexTemplateRequest;
 import org.elasticsearch.client.indices.PutComposableIndexTemplateRequest;
+import org.elasticsearch.client.indices.PutIndexTemplateRequest;
 import org.elasticsearch.client.indices.PutMappingRequest;
 import org.elasticsearch.client.indices.ReloadAnalyzersRequest;
 import org.elasticsearch.client.indices.ReloadAnalyzersResponse;
@@ -90,13 +89,13 @@
 import org.elasticsearch.common.unit.ByteSizeUnit;
 import org.elasticsearch.common.unit.ByteSizeValue;
 import org.elasticsearch.core.TimeValue;
-import org.elasticsearch.xcontent.XContentBuilder;
-import org.elasticsearch.xcontent.XContentFactory;
-import org.elasticsearch.xcontent.XContentType;
 import org.elasticsearch.index.IndexSettings;
 import org.elasticsearch.index.query.QueryBuilder;
 import org.elasticsearch.index.query.QueryBuilders;
 import org.elasticsearch.rest.RestStatus;
+import org.elasticsearch.xcontent.XContentBuilder;
+import org.elasticsearch.xcontent.XContentFactory;
+import org.elasticsearch.xcontent.XContentType;
 
 import java.io.IOException;
 import java.util.Collections;
@@ -108,7 +107,6 @@
 import java.util.concurrent.TimeUnit;
 
 import static org.elasticsearch.client.IndicesClientIT.FROZEN_INDICES_DEPRECATION_WARNING;
-import static org.elasticsearch.client.IndicesClientIT.IGNORE_THROTTLED_DEPRECATION_WARNING;
 import static org.elasticsearch.client.IndicesClientIT.LEGACY_TEMPLATE_OPTIONS;
 import static org.hamcrest.Matchers.containsInAnyOrder;
 import static org.hamcrest.Matchers.equalTo;
@@ -2874,89 +2872,6 @@ public void onFailure(Exception e) {
 
     }
 
-    public void testFreezeIndex() throws Exception {
-        RestHighLevelClient client = highLevelClient();
-
-        {
-            CreateIndexResponse createIndexResponse = client.indices().create(new CreateIndexRequest("index"), RequestOptions.DEFAULT);
-            assertTrue(createIndexResponse.isAcknowledged());
-        }
-
-        {
-            // tag::freeze-index-request
-            FreezeIndexRequest request = new FreezeIndexRequest("index"); // <1>
-            // end::freeze-index-request
-
-            // tag::freeze-index-request-timeout
-            request.setTimeout(TimeValue.timeValueMinutes(2)); // <1>
-            // end::freeze-index-request-timeout
-            // tag::freeze-index-request-masterTimeout
-            request.setMasterTimeout(TimeValue.timeValueMinutes(1)); // <1>
-            // end::freeze-index-request-masterTimeout
-            // tag::freeze-index-request-waitForActiveShards
-            request.setWaitForActiveShards(ActiveShardCount.DEFAULT); // <1>
-            // end::freeze-index-request-waitForActiveShards
-
-            // tag::freeze-index-request-indicesOptions
-            request.setIndicesOptions(IndicesOptions.strictExpandOpen()); // <1>
-            // end::freeze-index-request-indicesOptions
-
-            final RequestOptions freezeIndexOptions = RequestOptions.DEFAULT.toBuilder()
-                .setWarningsHandler(
-                    warnings -> List.of(FROZEN_INDICES_DEPRECATION_WARNING, IGNORE_THROTTLED_DEPRECATION_WARNING).equals(warnings) == false
-                ).build();
-
-            // tag::freeze-index-execute
-            ShardsAcknowledgedResponse openIndexResponse = client.indices().freeze(request, freezeIndexOptions);
-            // end::freeze-index-execute
-
-            // tag::freeze-index-response
-            boolean acknowledged = openIndexResponse.isAcknowledged(); // <1>
-            boolean shardsAcked = openIndexResponse.isShardsAcknowledged(); // <2>
-            // end::freeze-index-response
-            assertTrue(acknowledged);
-            assertTrue(shardsAcked);
-
-            // tag::freeze-index-execute-listener
-            ActionListener<ShardsAcknowledgedResponse> listener =
-                new ActionListener<ShardsAcknowledgedResponse>() {
-                    @Override
-                    public void onResponse(ShardsAcknowledgedResponse freezeIndexResponse) {
-                        // <1>
-                    }
-
-                    @Override
-                    public void onFailure(Exception e) {
-                        // <2>
-                    }
-                };
-            // end::freeze-index-execute-listener
-
-            // Replace the empty listener by a blocking listener in test
-            final CountDownLatch latch = new CountDownLatch(1);
-            listener = new LatchedActionListener<>(listener, latch);
-
-            // tag::freeze-index-execute-async
-            client.indices().freezeAsync(request, RequestOptions.DEFAULT, listener); // <1>
-            // end::freeze-index-execute-async
-
-            assertTrue(latch.await(30L, TimeUnit.SECONDS));
-        }
-
-        {
-            // tag::freeze-index-notfound
-            try {
-                FreezeIndexRequest request = new FreezeIndexRequest("does_not_exist");
-                client.indices().freeze(request, RequestOptions.DEFAULT);
-            } catch (ElasticsearchException exception) {
-                if (exception.status() == RestStatus.BAD_REQUEST) {
-                    // <1>
-                }
-            }
-            // end::freeze-index-notfound
-        }
-    }
-
     public void testUnfreezeIndex() throws Exception {
         RestHighLevelClient client = highLevelClient();
 

docs/java-rest/redirects.asciidoc

@@ -47,3 +47,11 @@ See <<java-rest-high-start-transform>>.
 === Stop {transform} API
 
 See <<java-rest-high-stop-transform>>.
+
+[role="exclude",id="java-rest-high-freeze-index"]
+=== Freeze index API
+
+The freeze index API was removed in 8.0. Frozen indices are no longer useful due
+to
+https://www.elastic.co/blog/significantly-decrease-your-elasticsearch-heap-memory-usage[recent
+improvements in heap memory usage].

docs/reference/data-streams/data-streams.asciidoc

@@ -67,7 +67,6 @@ such as:
 
 * <<indices-clone-index,Clone>>
 * <<indices-delete-index,Delete>>
-* <<freeze-index-api,Freeze>>
 * <<indices-shrink-index,Shrink>>
 * <<indices-split-index,Split>>
 

docs/reference/ilm/actions/ilm-searchable-snapshot.asciidoc

@@ -18,7 +18,7 @@ index>> to the frozen tier. In other phases, the action mounts a
 <<fully-mounted,fully mounted index>> to the corresponding data tier.
 
 If the `searchable_snapshot` action is used in the hot phase the subsequent
-phases cannot include the `shrink`, `forcemerge`, or `freeze` actions.
+phases cannot include the `shrink` or `forcemerge` actions.
 
 This action cannot be performed on a data stream's write index. Attempts to do
 so will fail. To convert the index to a searchable snapshot, first

docs/reference/ilm/ilm-actions.asciidoc

@@ -14,9 +14,6 @@ Permanently remove the index.
 Reduce the number of index segments and purge deleted documents.
 Makes the index read-only.
 
-<<ilm-freeze,Freeze>>::
-Freeze the index to minimize its memory footprint.
-
 <<ilm-migrate,Migrate>>::
 Move the index shards to the <<data-tiers, data tier>> that corresponds
 to the current {ilm-init} phase.
@@ -49,7 +46,6 @@ Ensure that a snapshot exists before deleting the index.
 include::actions/ilm-allocate.asciidoc[]
 include::actions/ilm-delete.asciidoc[]
 include::actions/ilm-forcemerge.asciidoc[]
-include::actions/ilm-freeze.asciidoc[]
 include::actions/ilm-migrate.asciidoc[]
 include::actions/ilm-readonly.asciidoc[]
 include::actions/ilm-rollover.asciidoc[]

docs/reference/ilm/ilm-index-lifecycle.asciidoc

@@ -106,7 +106,6 @@ actions in the order listed.
   - <<ilm-searchable-snapshot, Searchable Snapshot>>
   - <<ilm-allocate,Allocate>>
   - <<ilm-migrate,Migrate>>
-  - <<ilm-freeze,Freeze>>
 * Frozen
   - <<ilm-searchable-snapshot, Searchable Snapshot>>
 * Delete

docs/reference/ilm/ilm-overview.asciidoc

@@ -7,8 +7,8 @@
 <titleabbrev>Overview</titleabbrev>
 ++++
 
-You can create and apply {ilm-cap} ({ilm-init}) policies to automatically manage your indices 
-according to your performance, resiliency, and retention requirements. 
+You can create and apply {ilm-cap} ({ilm-init}) policies to automatically manage your indices
+according to your performance, resiliency, and retention requirements.
 
 Index lifecycle policies can trigger actions such as:
 
@@ -17,7 +17,6 @@ size, number of docs, or age.
 * **Shrink**: Reduces the number of primary shards in an index.
 * **Force merge**: Triggers a <<indices-forcemerge,force merge>> to reduce the
 number of segments in an index's shards.
-* **Freeze**: <<freeze-index-api, Freezes>> an index and makes it read-only.
 * **Delete**: Permanently remove an index, including all of its data and
 metadata.
 
@@ -48,9 +47,9 @@ hardware.
 
 [IMPORTANT]
 ===========================
-To use {ilm-init}, all nodes in a cluster must run the same version. 
-Although it might be possible to create and apply policies in a mixed-version cluster, 
+To use {ilm-init}, all nodes in a cluster must run the same version.
+Although it might be possible to create and apply policies in a mixed-version cluster,
 there is no guarantee they will work as intended.
 Attempting to use a policy that contains actions that aren't
-supported on all nodes in a cluster will cause errors. 
+supported on all nodes in a cluster will cause errors.
 ===========================

docs/reference/indices.asciidoc

@@ -18,7 +18,6 @@ index settings, aliases, mappings, and index templates.
 * <<indices-split-index>>
 * <<indices-clone-index>>
 * <<indices-rollover-index>>
-* <<freeze-index-api>>
 * <<unfreeze-index-api>>
 * <<indices-resolve-index-api>>
 
@@ -53,9 +52,9 @@ index settings, aliases, mappings, and index templates.
 === Index templates:
 
 Index templates automatically apply settings, mappings, and aliases to new indices.
-They are most often used to configure rolling indices for time series data to 
-ensure that each new index has the same configuration as the previous one. 
-The index template associated with a data stream configures its backing indices. 
+They are most often used to configure rolling indices for time series data to
+ensure that each new index has the same configuration as the previous one.
+The index template associated with a data stream configures its backing indices.
 For more information, see <<index-templates, Index Templates>>.
 
 * <<indices-put-template>>
@@ -113,7 +112,6 @@ include::indices/indices-exists.asciidoc[]
 include::indices/field-usage-stats.asciidoc[]
 include::indices/flush.asciidoc[]
 include::indices/forcemerge.asciidoc[]
-include::indices/apis/freeze.asciidoc[]
 include::indices/get-alias.asciidoc[]
 include::indices/get-component-template.asciidoc[]
 include::indices/get-field-mapping.asciidoc[]