Remove TSDB feature flag

modules/data-streams/src/main/java/org/elasticsearch/datastreams/DataStreamsPlugin.java

@@ -45,7 +45,6 @@
 import org.elasticsearch.env.Environment;
 import org.elasticsearch.env.NodeEnvironment;
 import org.elasticsearch.index.IndexSettingProvider;
-import org.elasticsearch.index.IndexSettings;
 import org.elasticsearch.plugins.ActionPlugin;
 import org.elasticsearch.plugins.Plugin;
 import org.elasticsearch.repositories.RepositoriesService;
@@ -99,10 +98,6 @@ static void additionalLookAheadTimeValidation(TimeValue lookAhead, TimeValue tim
 
     @Override
     public List<Setting<?>> getSettings() {
-        if (IndexSettings.isTimeSeriesModeEnabled() == false) {
-            return List.of();
-        }
-
         return List.of(TIME_SERIES_POLL_INTERVAL, LOOK_AHEAD_TIME);
     }
 
@@ -120,10 +115,6 @@ public Collection<Object> createComponents(
         IndexNameExpressionResolver indexNameExpressionResolver,
         Supplier<RepositoriesService> repositoriesServiceSupplier
     ) {
-        if (IndexSettings.isTimeSeriesModeEnabled() == false) {
-            return List.of();
-        }
-
         var service = new UpdateTimeSeriesRangeService(environment.settings(), threadPool, clusterService);
         this.service.set(service);
         return List.of(service);
@@ -151,12 +142,10 @@ public List<RestHandler> getRestHandlers(
         IndexNameExpressionResolver indexNameExpressionResolver,
         Supplier<DiscoveryNodes> nodesInCluster
     ) {
-        if (IndexSettings.isTimeSeriesModeEnabled()) {
-            indexScopedSettings.addSettingsUpdateConsumer(LOOK_AHEAD_TIME, value -> {
-                TimeValue timeSeriesPollInterval = service.get().pollInterval;
-                additionalLookAheadTimeValidation(value, timeSeriesPollInterval);
-            });
-        }
+        indexScopedSettings.addSettingsUpdateConsumer(LOOK_AHEAD_TIME, value -> {
+            TimeValue timeSeriesPollInterval = service.get().pollInterval;
+            additionalLookAheadTimeValidation(value, timeSeriesPollInterval);
+        });
 
         var createDsAction = new RestCreateDataStreamAction();
         var deleteDsAction = new RestDeleteDataStreamAction();

server/src/main/java/org/elasticsearch/cluster/metadata/IndexMetadata.java

@@ -1954,9 +1954,7 @@ public IndexMetadata build() {
 
             final boolean isSearchableSnapshot = SearchableSnapshotsSettings.isSearchableSnapshotStore(settings);
             final String indexMode = settings.get(IndexSettings.MODE.getKey());
-            final boolean isTsdb = IndexSettings.isTimeSeriesModeEnabled()
-                && indexMode != null
-                && IndexMode.TIME_SERIES.getName().equals(indexMode.toLowerCase(Locale.ROOT));
+            final boolean isTsdb = indexMode != null && IndexMode.TIME_SERIES.getName().equals(indexMode.toLowerCase(Locale.ROOT));
             return new IndexMetadata(
                 new Index(index, uuid),
                 version,

server/src/main/java/org/elasticsearch/common/settings/IndexScopedSettings.java

@@ -37,7 +37,6 @@
 import org.elasticsearch.indices.ShardLimitValidator;
 
 import java.util.Collections;
-import java.util.HashSet;
 import java.util.Map;
 import java.util.Set;
 
@@ -162,6 +161,11 @@ public final class IndexScopedSettings extends AbstractScopedSettings {
         DiskThresholdDecider.SETTING_IGNORE_DISK_WATERMARKS,
         ShardLimitValidator.INDEX_SETTING_SHARD_LIMIT_GROUP,
         DataTier.TIER_PREFERENCE_SETTING,
+        // TSDB
+        IndexSettings.MODE,
+        IndexMetadata.INDEX_ROUTING_PATH,
+        IndexSettings.TIME_SERIES_START_TIME,
+        IndexSettings.TIME_SERIES_END_TIME,
 
         // validate that built-in similarities don't get redefined
         Setting.groupSetting("index.similarity.", (s) -> {
@@ -180,15 +184,7 @@ public final class IndexScopedSettings extends AbstractScopedSettings {
     public static final Set<Setting<?>> BUILT_IN_INDEX_SETTINGS = builtInIndexSettings();
 
     private static Set<Setting<?>> builtInIndexSettings() {
-        if (false == IndexSettings.isTimeSeriesModeEnabled()) {
-            return ALWAYS_ENABLED_BUILT_IN_INDEX_SETTINGS;
-        }
-        Set<Setting<?>> result = new HashSet<>(ALWAYS_ENABLED_BUILT_IN_INDEX_SETTINGS);
-        result.add(IndexSettings.MODE);
-        result.add(IndexMetadata.INDEX_ROUTING_PATH);
-        result.add(IndexSettings.TIME_SERIES_START_TIME);
-        result.add(IndexSettings.TIME_SERIES_END_TIME);
-        return Set.copyOf(result);
+        return ALWAYS_ENABLED_BUILT_IN_INDEX_SETTINGS;
     }
 
     public static final IndexScopedSettings DEFAULT_SCOPED_SETTINGS = new IndexScopedSettings(Settings.EMPTY, BUILT_IN_INDEX_SETTINGS);

server/src/main/java/org/elasticsearch/index/IndexSettings.java

@@ -10,7 +10,6 @@
 import org.apache.logging.log4j.Logger;
 import org.apache.logging.log4j.util.Strings;
 import org.apache.lucene.index.MergePolicy;
-import org.elasticsearch.Build;
 import org.elasticsearch.Version;
 import org.elasticsearch.cluster.metadata.IndexMetadata;
 import org.elasticsearch.cluster.routing.IndexRouting;
@@ -23,7 +22,6 @@
 import org.elasticsearch.common.time.DateUtils;
 import org.elasticsearch.common.unit.ByteSizeUnit;
 import org.elasticsearch.common.unit.ByteSizeValue;
-import org.elasticsearch.core.Booleans;
 import org.elasticsearch.core.TimeValue;
 import org.elasticsearch.index.translog.Translog;
 import org.elasticsearch.ingest.IngestService;
@@ -455,24 +453,6 @@ public final class IndexSettings {
         Setting.Property.IndexScope
     );
 
-    /**
-     * Is the {@code index.mode} enabled? It should only be enbaled if you
-     * pass a jvm parameter or are running a snapshot build.
-     */
-    private static final Boolean TIME_SERIES_MODE_FEATURE_FLAG_REGISTERED;
-
-    static {
-        final String property = System.getProperty("es.index_mode_feature_flag_registered");
-        if (Build.CURRENT.isSnapshot() && property != null) {
-            throw new IllegalArgumentException("es.index_mode_feature_flag_registered is only supported in non-snapshot builds");
-        }
-        TIME_SERIES_MODE_FEATURE_FLAG_REGISTERED = Booleans.parseBoolean(property, null);
-    }
-
-    public static boolean isTimeSeriesModeEnabled() {
-        return Build.CURRENT.isSnapshot() || (TIME_SERIES_MODE_FEATURE_FLAG_REGISTERED != null && TIME_SERIES_MODE_FEATURE_FLAG_REGISTERED);
-    }
-
     /**
      * in time series mode, the start time of the index, timestamp must larger than start_time
      */
@@ -696,7 +676,7 @@ public IndexSettings(final IndexMetadata indexMetadata, final Settings nodeSetti
         nodeName = Node.NODE_NAME_SETTING.get(settings);
         this.indexMetadata = indexMetadata;
         numberOfShards = settings.getAsInt(IndexMetadata.SETTING_NUMBER_OF_SHARDS, null);
-        mode = isTimeSeriesModeEnabled() ? scopedSettings.get(MODE) : IndexMode.STANDARD;
+        mode = scopedSettings.get(MODE);
         this.timestampBounds = mode.getTimestampBound(indexMetadata);
         if (timestampBounds != null) {
             scopedSettings.addSettingsUpdateConsumer(

server/src/main/java/org/elasticsearch/index/mapper/SourceFieldMapper.java

@@ -20,7 +20,6 @@
 import org.elasticsearch.common.util.CollectionUtils;
 import org.elasticsearch.common.xcontent.XContentFieldFilter;
 import org.elasticsearch.core.Nullable;
-import org.elasticsearch.index.IndexSettings;
 import org.elasticsearch.index.query.QueryShardException;
 import org.elasticsearch.index.query.SearchExecutionContext;
 import org.elasticsearch.xcontent.XContentType;
@@ -104,10 +103,7 @@ public Builder() {
 
         @Override
         protected Parameter<?>[] getParameters() {
-            if (IndexSettings.isTimeSeriesModeEnabled()) {
-                return new Parameter<?>[] { enabled, mode, includes, excludes };
-            }
-            return new Parameter<?>[] { enabled, includes, excludes };
+            return new Parameter<?>[] { enabled, mode, includes, excludes };
         }
 
         private boolean isDefault() {

server/src/main/java/org/elasticsearch/rest/action/document/RestGetAction.java

@@ -13,7 +13,6 @@
 import org.elasticsearch.client.internal.node.NodeClient;
 import org.elasticsearch.common.Strings;
 import org.elasticsearch.core.RestApiVersion;
-import org.elasticsearch.index.IndexSettings;
 import org.elasticsearch.index.VersionType;
 import org.elasticsearch.rest.BaseRestHandler;
 import org.elasticsearch.rest.RestRequest;
@@ -79,7 +78,7 @@ public RestChannelConsumer prepareRequest(final RestRequest request, final NodeC
         getRequest.versionType(VersionType.fromString(request.param("version_type"), getRequest.versionType()));
 
         getRequest.fetchSourceContext(FetchSourceContext.parseFromRestRequest(request));
-        if (IndexSettings.isTimeSeriesModeEnabled() && request.paramAsBoolean("force_synthetic_source", false)) {
+        if (request.paramAsBoolean("force_synthetic_source", false)) {
             getRequest.setForceSyntheticSource(true);
         }
 

server/src/main/java/org/elasticsearch/rest/action/document/RestMultiGetAction.java

@@ -13,7 +13,6 @@
 import org.elasticsearch.common.Strings;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.core.RestApiVersion;
-import org.elasticsearch.index.IndexSettings;
 import org.elasticsearch.rest.BaseRestHandler;
 import org.elasticsearch.rest.RestRequest;
 import org.elasticsearch.rest.action.RestToXContentListener;
@@ -61,7 +60,7 @@ public RestChannelConsumer prepareRequest(final RestRequest request, final NodeC
         multiGetRequest.refresh(request.paramAsBoolean("refresh", multiGetRequest.refresh()));
         multiGetRequest.preference(request.param("preference"));
         multiGetRequest.realtime(request.paramAsBoolean("realtime", multiGetRequest.realtime()));
-        if (IndexSettings.isTimeSeriesModeEnabled() && request.paramAsBoolean("force_synthetic_source", false)) {
+        if (request.paramAsBoolean("force_synthetic_source", false)) {
             multiGetRequest.setForceSyntheticSource(true);
         }
 

server/src/main/java/org/elasticsearch/rest/action/search/RestSearchAction.java

@@ -21,7 +21,6 @@
 import org.elasticsearch.common.logging.DeprecationLogger;
 import org.elasticsearch.core.Booleans;
 import org.elasticsearch.core.RestApiVersion;
-import org.elasticsearch.index.IndexSettings;
 import org.elasticsearch.index.query.QueryBuilder;
 import org.elasticsearch.rest.BaseRestHandler;
 import org.elasticsearch.rest.RestRequest;
@@ -209,7 +208,7 @@ public static void parseSearchRequest(
                 request.paramAsBoolean("ccs_minimize_roundtrips", searchRequest.isCcsMinimizeRoundtrips())
             );
         }
-        if (IndexSettings.isTimeSeriesModeEnabled() && request.paramAsBoolean("force_synthetic_source", false)) {
+        if (request.paramAsBoolean("force_synthetic_source", false)) {
             searchRequest.setForceSyntheticSource(true);
         }
 

server/src/main/java/org/elasticsearch/search/SearchModule.java

@@ -18,7 +18,6 @@
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.core.Nullable;
 import org.elasticsearch.core.RestApiVersion;
-import org.elasticsearch.index.IndexSettings;
 import org.elasticsearch.index.query.BoolQueryBuilder;
 import org.elasticsearch.index.query.BoostingQueryBuilder;
 import org.elasticsearch.index.query.CombinedFieldsQueryBuilder;
@@ -656,16 +655,11 @@ private ValuesSourceRegistry registerAggregations(List<SearchPlugin> plugins) {
                 .setAggregatorRegistrar(CompositeAggregationBuilder::registerAggregators),
             builder
         );
-        if (IndexSettings.isTimeSeriesModeEnabled()) {
-            registerAggregation(
-                new AggregationSpec(
-                    TimeSeriesAggregationBuilder.NAME,
-                    TimeSeriesAggregationBuilder::new,
-                    TimeSeriesAggregationBuilder.PARSER
-                ).addResultReader(InternalTimeSeries::new),
-                builder
-            );
-        }
+        registerAggregation(
+            new AggregationSpec(TimeSeriesAggregationBuilder.NAME, TimeSeriesAggregationBuilder::new, TimeSeriesAggregationBuilder.PARSER)
+                .addResultReader(InternalTimeSeries::new),
+            builder
+        );
 
         if (RestApiVersion.minimumSupported() == RestApiVersion.V_7) {
             registerQuery(

server/src/main/java/org/elasticsearch/search/SearchService.java

@@ -1223,7 +1223,7 @@ private void parseSource(DefaultSearchContext context, SearchSourceBuilder sourc
                 context::isCancelled,
                 context::buildFilteredQuery,
                 enableRewriteAggsToFilterByFilter,
-                IndexSettings.isTimeSeriesModeEnabled() && source.aggregations().isInSortOrderExecutionRequired()
+                source.aggregations().isInSortOrderExecutionRequired()
             );
             context.addReleasable(aggContext);
             try {

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/XPackClientPlugin.java

@@ -13,7 +13,6 @@
 import org.elasticsearch.cluster.metadata.Metadata;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.settings.Setting;
-import org.elasticsearch.index.IndexSettings;
 import org.elasticsearch.license.DeleteLicenseAction;
 import org.elasticsearch.license.GetBasicStatusAction;
 import org.elasticsearch.license.GetLicenseAction;
@@ -414,17 +413,15 @@ public List<ActionType<? extends ActionResponse>> getClientActions() {
         );
 
         // TSDB Downsampling / Rollup
-        if (IndexSettings.isTimeSeriesModeEnabled()) {
-            actions.add(RollupIndexerAction.INSTANCE);
-            actions.add(RollupAction.INSTANCE);
-        }
+        actions.add(RollupIndexerAction.INSTANCE);
+        actions.add(RollupAction.INSTANCE);
 
         return actions;
     }
 
     @Override
     public List<NamedWriteableRegistry.Entry> getNamedWriteables() {
-        List<NamedWriteableRegistry.Entry> namedWriteables = new ArrayList<>(
+        return new ArrayList<>(
             Arrays.asList(
                 // graph
                 new NamedWriteableRegistry.Entry(XPackFeatureSet.Usage.class, XPackField.GRAPH, GraphFeatureSetUsage::new),
@@ -568,16 +565,11 @@ public List<NamedWriteableRegistry.Entry> getNamedWriteables() {
                 // Data Tiers
                 new NamedWriteableRegistry.Entry(XPackFeatureSet.Usage.class, XPackField.DATA_TIERS, DataTiersFeatureSetUsage::new),
                 // Archive
-                new NamedWriteableRegistry.Entry(XPackFeatureSet.Usage.class, XPackField.ARCHIVE, ArchiveFeatureSetUsage::new)
+                new NamedWriteableRegistry.Entry(XPackFeatureSet.Usage.class, XPackField.ARCHIVE, ArchiveFeatureSetUsage::new),
+                // TSDB Downsampling / Rollup
+                new NamedWriteableRegistry.Entry(LifecycleAction.class, RollupILMAction.NAME, RollupILMAction::new)
             )
         );
-
-        // TSDB Downsampling / Rollup
-        if (IndexSettings.isTimeSeriesModeEnabled()) {
-            namedWriteables.add(new NamedWriteableRegistry.Entry(LifecycleAction.class, RollupILMAction.NAME, RollupILMAction::new));
-        }
-
-        return namedWriteables;
     }
 
     @Override

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/ilm/TimeseriesLifecycleType.java

@@ -10,7 +10,6 @@
 import org.elasticsearch.common.io.stream.StreamOutput;
 import org.elasticsearch.common.util.set.Sets;
 import org.elasticsearch.core.TimeValue;
-import org.elasticsearch.index.IndexSettings;
 
 import java.io.IOException;
 import java.util.ArrayList;
@@ -27,7 +26,6 @@
 import java.util.Optional;
 import java.util.Set;
 import java.util.stream.Collectors;
-import java.util.stream.Stream;
 
 import static java.util.stream.Collectors.toList;
 
@@ -51,16 +49,16 @@ public class TimeseriesLifecycleType implements LifecycleType {
     static final String DELETE_PHASE = "delete";
     public static final List<String> ORDERED_VALID_PHASES = List.of(HOT_PHASE, WARM_PHASE, COLD_PHASE, FROZEN_PHASE, DELETE_PHASE);
 
-    public static final List<String> ORDERED_VALID_HOT_ACTIONS = Stream.of(
+    public static final List<String> ORDERED_VALID_HOT_ACTIONS = Arrays.asList(
         SetPriorityAction.NAME,
         UnfollowAction.NAME,
         RolloverAction.NAME,
         ReadOnlyAction.NAME,
-        IndexSettings.isTimeSeriesModeEnabled() ? RollupILMAction.NAME : null,
+        RollupILMAction.NAME,
         ShrinkAction.NAME,
         ForceMergeAction.NAME,
         SearchableSnapshotAction.NAME
-    ).filter(Objects::nonNull).toList();
+    );
     public static final List<String> ORDERED_VALID_WARM_ACTIONS = Arrays.asList(
         SetPriorityAction.NAME,
         UnfollowAction.NAME,
@@ -70,16 +68,16 @@ public class TimeseriesLifecycleType implements LifecycleType {
         ShrinkAction.NAME,
         ForceMergeAction.NAME
     );
-    public static final List<String> ORDERED_VALID_COLD_ACTIONS = Stream.of(
+    public static final List<String> ORDERED_VALID_COLD_ACTIONS = Arrays.asList(
         SetPriorityAction.NAME,
         UnfollowAction.NAME,
         ReadOnlyAction.NAME,
         SearchableSnapshotAction.NAME,
         AllocateAction.NAME,
         MigrateAction.NAME,
         FreezeAction.NAME,
-        IndexSettings.isTimeSeriesModeEnabled() ? RollupILMAction.NAME : null
-    ).filter(Objects::nonNull).toList();
+        RollupILMAction.NAME
+    );
     public static final List<String> ORDERED_VALID_FROZEN_ACTIONS = List.of(UnfollowAction.NAME, SearchableSnapshotAction.NAME);
     public static final List<String> ORDERED_VALID_DELETE_ACTIONS = List.of(WaitForSnapshotAction.NAME, DeleteAction.NAME);
 

x-pack/plugin/ilm/src/main/java/org/elasticsearch/xpack/ilm/IndexLifecycle.java

@@ -28,7 +28,6 @@
 import org.elasticsearch.env.NodeEnvironment;
 import org.elasticsearch.health.HealthIndicatorService;
 import org.elasticsearch.index.IndexModule;
-import org.elasticsearch.index.IndexSettings;
 import org.elasticsearch.license.XPackLicenseState;
 import org.elasticsearch.plugins.ActionPlugin;
 import org.elasticsearch.plugins.HealthPlugin;
@@ -330,11 +329,7 @@ private static List<NamedXContentRegistry.Entry> xContentEntries() {
         );
 
         // TSDB Downsampling / Rollup
-        if (IndexSettings.isTimeSeriesModeEnabled()) {
-            entries.add(
-                new NamedXContentRegistry.Entry(LifecycleAction.class, new ParseField(RollupILMAction.NAME), RollupILMAction::parse)
-            );
-        }
+        entries.add(new NamedXContentRegistry.Entry(LifecycleAction.class, new ParseField(RollupILMAction.NAME), RollupILMAction::parse));
         return List.copyOf(entries);
     }