Remove setting index.optimize_auto_generated_id (#27600)

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

@@ -159,7 +159,6 @@ public final class IndexScopedSettings extends AbstractScopedSettings {
         IndexModule.INDEX_QUERY_CACHE_ENABLED_SETTING,
         FsDirectoryService.INDEX_LOCK_FACTOR_SETTING,
         EngineConfig.INDEX_CODEC_SETTING,
-        EngineConfig.INDEX_OPTIMIZE_AUTO_GENERATED_IDS,
         IndexMetaData.SETTING_WAIT_FOR_ACTIVE_SHARDS,
         IndexSettings.DEFAULT_PIPELINE,
 

server/src/main/java/org/elasticsearch/index/engine/EngineConfig.java

@@ -116,16 +116,6 @@ public Supplier<RetentionLeases> retentionLeasesSupplier() {
         }
     }, Property.IndexScope, Property.NodeScope);
 
-    /**
-     * Configures an index to optimize documents with auto generated ids for append only. If this setting is updated from <code>false</code>
-     * to <code>true</code> might not take effect immediately. In other words, disabling the optimization will be immediately applied while
-     * re-enabling it might not be applied until the engine is in a safe state to do so. Depending on the engine implementation a change to
-     * this setting won't be reflected re-enabled optimization until the engine is restarted or the index is closed and reopened.
-     * The default is <code>true</code>
-     */
-    public static final Setting<Boolean> INDEX_OPTIMIZE_AUTO_GENERATED_IDS = Setting.boolSetting("index.optimize_auto_generated_id", true,
-        Property.IndexScope, Property.Dynamic);
-
     private final TranslogConfig translogConfig;
 
     /**
@@ -349,14 +339,6 @@ public List<ReferenceManager.RefreshListener> getExternalRefreshListener() {
      */
     public List<ReferenceManager.RefreshListener> getInternalRefreshListener() { return internalRefreshListener;}
 
-
-    /**
-     * returns true if the engine is allowed to optimize indexing operations with an auto-generated ID
-     */
-    public boolean isAutoGeneratedIDsOptimizationEnabled() {
-        return indexSettings.getValue(INDEX_OPTIMIZE_AUTO_GENERATED_IDS);
-    }
-
     /**
      * Return the sort order of this index, or null if the index has no sort.
      */

server/src/main/java/org/elasticsearch/index/engine/InternalEngine.java

@@ -171,9 +171,6 @@ public InternalEngine(EngineConfig engineConfig) {
             final EngineConfig engineConfig,
             final BiFunction<Long, Long, LocalCheckpointTracker> localCheckpointTrackerSupplier) {
         super(engineConfig);
-        if (engineConfig.isAutoGeneratedIDsOptimizationEnabled() == false) {
-            updateAutoIdTimestamp(Long.MAX_VALUE, true);
-        }
         final TranslogDeletionPolicy translogDeletionPolicy = new TranslogDeletionPolicy(
                 engineConfig.getIndexSettings().getTranslogRetentionSize().getBytes(),
                 engineConfig.getIndexSettings().getTranslogRetentionAge().getMillis()
@@ -2400,12 +2397,6 @@ public void onSettingsChanged() {
         mergeScheduler.refreshConfig();
         // config().isEnableGcDeletes() or config.getGcDeletesInMillis() may have changed:
         maybePruneDeletes();
-        if (engineConfig.isAutoGeneratedIDsOptimizationEnabled() == false) {
-            // this is an anti-viral settings you can only opt out for the entire index
-            // only if a shard starts up again due to relocation or if the index is closed
-            // the setting will be re-interpreted if it's set to true
-            updateAutoIdTimestamp(Long.MAX_VALUE, true);
-        }
         final TranslogDeletionPolicy translogDeletionPolicy = translog.getDeletionPolicy();
         final IndexSettings indexSettings = engineConfig.getIndexSettings();
         translogDeletionPolicy.setRetentionAgeInMillis(indexSettings.getTranslogRetentionAge().getMillis());

server/src/main/java/org/elasticsearch/indices/IndicesService.java

@@ -83,7 +83,6 @@
 import org.elasticsearch.index.analysis.AnalysisRegistry;
 import org.elasticsearch.index.cache.request.ShardRequestCache;
 import org.elasticsearch.index.engine.CommitStats;
-import org.elasticsearch.index.engine.EngineConfig;
 import org.elasticsearch.index.engine.EngineFactory;
 import org.elasticsearch.index.engine.InternalEngineFactory;
 import org.elasticsearch.index.fielddata.IndexFieldDataCache;
@@ -494,11 +493,6 @@ private synchronized IndexService createIndexService(final String reason,
                                                          List<IndexEventListener> builtInListeners,
                                                          IndexingOperationListener... indexingOperationListeners) throws IOException {
         final IndexSettings idxSettings = new IndexSettings(indexMetaData, settings, indexScopedSettings);
-        if (idxSettings.getIndexVersionCreated().onOrAfter(Version.V_7_0_0)
-            && EngineConfig.INDEX_OPTIMIZE_AUTO_GENERATED_IDS.exists(idxSettings.getSettings())) {
-            throw new IllegalArgumentException(
-                "Setting [" + EngineConfig.INDEX_OPTIMIZE_AUTO_GENERATED_IDS.getKey() + "] was removed in version 7.0.0");
-        }
         // we ignore private settings since they are not registered settings
         indexScopedSettings.validate(indexMetaData.getSettings(), true, true, true);
         logger.debug("creating Index [{}], shards [{}]/[{}] - reason [{}]",

server/src/test/java/org/elasticsearch/indices/IndicesServiceTests.java

@@ -642,48 +642,4 @@ public static ClusterState createClusterForShardLimitTest(int nodesInCluster, in
             .build();
     }
 
-    public void testOptimizeAutoGeneratedIdsSettingRemoval() throws Exception {
-        final IndicesService indicesService = getIndicesService();
-
-        final Index index = new Index("foo-index", UUIDs.randomBase64UUID());
-        Settings.Builder builder = Settings.builder()
-            .put(IndexMetaData.SETTING_VERSION_CREATED, Version.V_7_0_0)
-            .put(IndexMetaData.SETTING_INDEX_UUID, index.getUUID());
-        IndexMetaData indexMetaData = new IndexMetaData.Builder(index.getName())
-            .settings(builder.build())
-            .numberOfShards(1)
-            .numberOfReplicas(0)
-            .build();
-        IndexService indexService = indicesService.createIndex(indexMetaData, Collections.emptyList());
-        assertNotNull(indexService);
-
-        final Index index2 = new Index("bar-index", UUIDs.randomBase64UUID());
-        Settings.Builder builder2 = Settings.builder()
-            .put(IndexMetaData.SETTING_VERSION_CREATED, Version.V_7_0_0)
-            .put(IndexMetaData.SETTING_INDEX_UUID, index2.getUUID())
-            .put(EngineConfig.INDEX_OPTIMIZE_AUTO_GENERATED_IDS.getKey(), randomBoolean());
-        IndexMetaData indexMetaData2 = new IndexMetaData.Builder(index2.getName())
-            .settings(builder2.build())
-            .numberOfShards(1)
-            .numberOfReplicas(0)
-            .build();
-        IllegalArgumentException ex = expectThrows(IllegalArgumentException.class,
-            () -> indicesService.createIndex(indexMetaData2, Collections.emptyList()));
-        assertEquals("Setting [" + EngineConfig.INDEX_OPTIMIZE_AUTO_GENERATED_IDS.getKey() + "] was removed in version 7.0.0",
-            ex.getMessage());
-
-        Version version = randomFrom(Version.V_6_0_0_rc1, Version.V_6_0_0, Version.V_6_2_0, Version.V_6_3_0, Version.V_6_4_0);
-        builder = Settings.builder()
-            .put(IndexMetaData.SETTING_VERSION_CREATED, version)
-            .put(IndexMetaData.SETTING_INDEX_UUID, index2.getUUID())
-            .put(EngineConfig.INDEX_OPTIMIZE_AUTO_GENERATED_IDS.getKey(), randomBoolean());
-        IndexMetaData indexMetaData3 = new IndexMetaData.Builder(index2.getName())
-            .settings(builder.build())
-            .numberOfShards(1)
-            .numberOfReplicas(0)
-            .build();
-        IndexService indexService2 = indicesService.createIndex(indexMetaData3, Collections.emptyList());
-        assertNotNull(indexService2);
-    }
-
 }

x-pack/plugin/ccr/src/test/java/org/elasticsearch/xpack/ccr/action/TransportResumeFollowActionTests.java

@@ -14,7 +14,6 @@
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.index.IndexSettings;
 import org.elasticsearch.index.MapperTestUtils;
-import org.elasticsearch.index.engine.EngineConfig;
 import org.elasticsearch.index.mapper.MapperService;
 import org.elasticsearch.test.ESTestCase;
 import org.elasticsearch.test.VersionUtils;
@@ -233,7 +232,6 @@ public void testDynamicIndexSettingsAreClassified() {
         replicatedSettings.add(MapperService.INDEX_MAPPER_DYNAMIC_SETTING);
         replicatedSettings.add(IndexSettings.MAX_NGRAM_DIFF_SETTING);
         replicatedSettings.add(IndexSettings.MAX_SHINGLE_DIFF_SETTING);
-        replicatedSettings.add(EngineConfig.INDEX_OPTIMIZE_AUTO_GENERATED_IDS);
 
         for (Setting<?> setting : IndexScopedSettings.BUILT_IN_INDEX_SETTINGS) {
             if (setting.isDynamic()) {