elastic · Kubik42 · Sep 12, 2025 · Sep 12, 2025
diff --git a/docs/changelog/134253.yaml b/docs/changelog/134253.yaml
@@ -0,0 +1,5 @@
+pr: 134253
+summary: Fixed a bug where text fields in LogsDB indices did not use their keyword multi fields for block loading
+area: Mapping
+type: bug
+issues: []
diff --git a/...-extras/src/main/java/org/elasticsearch/index/mapper/extras/MatchOnlyTextFieldMapper.java b/...-extras/src/main/java/org/elasticsearch/index/mapper/extras/MatchOnlyTextFieldMapper.java
@@ -247,8 +247,7 @@ private IOFunction<LeafReaderContext, CheckedIntFunction<List<Object>, IOExcepti
                 String parentField = searchExecutionContext.parentPath(name());
                 var parent = searchExecutionContext.lookup().fieldType(parentField);
 
-                if (parent instanceof KeywordFieldMapper.KeywordFieldType keywordParent
-                    && keywordParent.ignoreAbove() != Integer.MAX_VALUE) {
+                if (parent instanceof KeywordFieldMapper.KeywordFieldType keywordParent && keywordParent.ignoreAbove().isSet()) {
                     if (parent.isStored()) {
                         return storedFieldFetcher(parentField, keywordParent.originalName());
                     } else if (parent.hasDocValues()) {
@@ -272,7 +271,7 @@ private IOFunction<LeafReaderContext, CheckedIntFunction<List<Object>, IOExcepti
                 if (kwd != null) {
                     var fieldType = kwd.fieldType();
 
-                    if (fieldType.ignoreAbove() != Integer.MAX_VALUE) {
+                    if (fieldType.ignoreAbove().isSet()) {
                         if (fieldType.isStored()) {
                             return storedFieldFetcher(fieldType.name(), fieldType.originalName());
                         } else if (fieldType.hasDocValues()) {

diff --git a/...u/src/main/java/org/elasticsearch/plugin/analysis/icu/ICUCollationKeywordFieldMapper.java b/...u/src/main/java/org/elasticsearch/plugin/analysis/icu/ICUCollationKeywordFieldMapper.java
@@ -250,12 +250,10 @@ public static class Builder extends FieldMapper.Builder {
             false
         ).acceptsNull();
 
-        final Parameter<Integer> ignoreAbove = Parameter.intParam("ignore_above", true, m -> toType(m).ignoreAbove, Integer.MAX_VALUE)
-            .addValidator(v -> {
-                if (v < 0) {
-                    throw new IllegalArgumentException("[ignore_above] must be positive, got [" + v + "]");
-                }
-            });
+        final Parameter<Integer> ignoreAbove = Parameter.ignoreAboveParam(
+            m -> toType(m).ignoreAbove,
+            IgnoreAbove.IGNORE_ABOVE_DEFAULT_VALUE
+        );
         final Parameter<String> nullValue = Parameter.stringParam("null_value", false, m -> toType(m).nullValue, null).acceptsNull();
 
         public Builder(String name) {

diff --git a/server/src/main/java/org/elasticsearch/index/IndexSettings.java b/server/src/main/java/org/elasticsearch/index/IndexSettings.java
@@ -812,20 +812,21 @@ public Iterator<Setting<?>> settings() {
 
     public static final Setting<Integer> IGNORE_ABOVE_SETTING = Setting.intSetting(
         "index.mapping.ignore_above",
-        IndexSettings::getIgnoreAboveDefaultValue,
+        settings -> String.valueOf(getIgnoreAboveDefaultValue(settings)),
         0,
         Integer.MAX_VALUE,
         Property.IndexScope,
         Property.ServerlessPublic
     );
 
-    private static String getIgnoreAboveDefaultValue(final Settings settings) {
-        if (IndexSettings.MODE.get(settings) == IndexMode.LOGSDB
-            && IndexMetadata.SETTING_INDEX_VERSION_CREATED.get(settings).onOrAfter(IndexVersions.ENABLE_IGNORE_ABOVE_LOGSDB)) {
-            return "8191";
-        } else {
-            return String.valueOf(Integer.MAX_VALUE);
+    private static int getIgnoreAboveDefaultValue(final Settings settings) {
+        if (settings == null) {
+            return Mapper.IgnoreAbove.IGNORE_ABOVE_DEFAULT_VALUE;
         }
+        return Mapper.IgnoreAbove.getIgnoreAboveDefaultValue(
+            IndexSettings.MODE.get(settings),
+            IndexMetadata.SETTING_INDEX_VERSION_CREATED.get(settings)
+        );
     }
 
     public static final NodeFeature IGNORE_ABOVE_INDEX_LEVEL_SETTING = new NodeFeature("mapper.ignore_above_index_level_setting", true);

diff --git a/server/src/main/java/org/elasticsearch/index/mapper/FieldMapper.java b/server/src/main/java/org/elasticsearch/index/mapper/FieldMapper.java
@@ -1311,6 +1311,14 @@ public static Parameter<Boolean> docValuesParam(Function<FieldMapper, Boolean> i
             return Parameter.boolParam("doc_values", false, initializer, defaultValue);
         }
 
+        public static Parameter<Integer> ignoreAboveParam(Function<FieldMapper, Integer> initializer, int defaultValue) {
+            return Parameter.intParam("ignore_above", true, initializer, defaultValue).addValidator(v -> {
+                if (v < 0) {
+                    throw new IllegalArgumentException("[ignore_above] must be positive, got [" + v + "]");
+                }
+            });
+        }
+
         /**
          * Defines a script parameter
          * @param initializer   retrieves the equivalent parameter from an existing FieldMapper for use in merges
@@ -1681,6 +1689,12 @@ public TypeParser(
             this(builderFunction, (n, c) -> contextValidator.forEach(v -> v.accept(n, c)), IndexVersions.MINIMUM_COMPATIBLE);
         }
 
+        private static final IndexVersion MINIMUM_LEGACY_COMPATIBILITY_VERSION = IndexVersion.fromId(5000099);
+
+        public static TypeParser createTypeParserWithLegacySupport(BiFunction<String, MappingParserContext, Builder> builderFunction) {
+            return new TypeParser(builderFunction, MINIMUM_LEGACY_COMPATIBILITY_VERSION);
+        }
+
         private TypeParser(
             BiFunction<String, MappingParserContext, Builder> builderFunction,
             BiConsumer<String, MappingParserContext> contextValidator,

diff --git a/server/src/main/java/org/elasticsearch/index/mapper/KeywordFieldMapper.java b/server/src/main/java/org/elasticsearch/index/mapper/KeywordFieldMapper.java
@@ -42,6 +42,7 @@
 import org.elasticsearch.common.unit.Fuzziness;
 import org.elasticsearch.core.Nullable;
 import org.elasticsearch.features.NodeFeature;
+import org.elasticsearch.index.IndexMode;
 import org.elasticsearch.index.IndexVersion;
 import org.elasticsearch.index.IndexVersions;
 import org.elasticsearch.index.analysis.IndexAnalyzers;
@@ -90,6 +91,7 @@
 import static org.elasticsearch.core.Strings.format;
 import static org.elasticsearch.index.IndexSettings.IGNORE_ABOVE_SETTING;
 import static org.elasticsearch.index.mapper.FieldArrayContext.getOffsetsFieldName;
+import static org.elasticsearch.index.mapper.Mapper.IgnoreAbove.getIgnoreAboveDefaultValue;
 
 /**
  * A field mapper for keywords. This mapper accepts strings and indexes them as-is.
@@ -169,6 +171,7 @@ public static final class Builder extends FieldMapper.DimensionBuilder {
         );
         private final Parameter<Integer> ignoreAbove;
         private final int ignoreAboveDefault;
+        private final IndexMode indexMode;
 
         private final Parameter<String> indexOptions = TextParams.keywordIndexOptions(m -> toType(m).indexOptions);
         private final Parameter<Boolean> hasNorms = TextParams.norms(false, m -> toType(m).fieldType.omitNorms() == false);
@@ -206,16 +209,36 @@ public Builder(final String name, final MappingParserContext mappingParserContex
                 mappingParserContext.scriptCompiler(),
                 IGNORE_ABOVE_SETTING.get(mappingParserContext.getSettings()),
                 mappingParserContext.getIndexSettings().getIndexVersionCreated(),
+                mappingParserContext.getIndexSettings().getMode(),
                 mappingParserContext.getIndexSettings().sourceKeepMode()
             );
         }
 
         Builder(
+            String name,
+            IndexAnalyzers indexAnalyzers,
+            ScriptCompiler scriptCompiler,
+            IndexVersion indexCreatedVersion,
+            SourceKeepMode sourceKeepMode
+        ) {
+            this(
+                name,
+                indexAnalyzers,
+                scriptCompiler,
+                getIgnoreAboveDefaultValue(IndexMode.STANDARD, indexCreatedVersion),
+                indexCreatedVersion,
+                IndexMode.STANDARD,
+                sourceKeepMode
+            );
+        }
+
+        private Builder(
             String name,
             IndexAnalyzers indexAnalyzers,
             ScriptCompiler scriptCompiler,
             int ignoreAboveDefault,
             IndexVersion indexCreatedVersion,
+            IndexMode indexMode,
             SourceKeepMode indexSourceKeepMode
         ) {
             super(name);
@@ -245,17 +268,13 @@ public Builder(final String name, final MappingParserContext mappingParserContex
                 }
             }).precludesParameters(normalizer);
             this.ignoreAboveDefault = ignoreAboveDefault;
-            this.ignoreAbove = Parameter.intParam("ignore_above", true, m -> toType(m).fieldType().ignoreAbove(), ignoreAboveDefault)
-                .addValidator(v -> {
-                    if (v < 0) {
-                        throw new IllegalArgumentException("[ignore_above] must be positive, got [" + v + "]");
-                    }
-                });
+            this.ignoreAbove = Parameter.ignoreAboveParam(m -> toType(m).fieldType().ignoreAbove().get(), ignoreAboveDefault);
+            this.indexMode = indexMode;
             this.indexSourceKeepMode = indexSourceKeepMode;
         }
 
         public Builder(String name, IndexVersion indexCreatedVersion) {
-            this(name, null, ScriptCompiler.NONE, Integer.MAX_VALUE, indexCreatedVersion, SourceKeepMode.NONE);
+            this(name, null, ScriptCompiler.NONE, indexCreatedVersion, SourceKeepMode.NONE);
         }
 
         public Builder ignoreAbove(int ignoreAbove) {
@@ -418,7 +437,9 @@ public KeywordFieldMapper build(MapperBuilderContext context) {
 
     public static final class KeywordFieldType extends StringFieldType {
 
-        private final int ignoreAbove;
+        private static final IgnoreAbove IGNORE_ABOVE_DEFAULT = new IgnoreAbove(null, IndexMode.STANDARD);
+
+        private final IgnoreAbove ignoreAbove;
         private final String nullValue;
         private final NamedAnalyzer normalizer;
         private final boolean eagerGlobalOrdinals;
@@ -446,18 +467,22 @@ public KeywordFieldType(
             );
             this.eagerGlobalOrdinals = builder.eagerGlobalOrdinals.getValue();
             this.normalizer = normalizer;
-            this.ignoreAbove = builder.ignoreAbove.getValue();
+            this.ignoreAbove = new IgnoreAbove(builder.ignoreAbove.getValue(), builder.indexMode, builder.indexCreatedVersion);
             this.nullValue = builder.nullValue.getValue();
             this.scriptValues = builder.scriptValues();
             this.isDimension = builder.dimension.getValue();
             this.isSyntheticSource = isSyntheticSource;
             this.originalName = isSyntheticSource ? name + "._original" : null;
         }
 
+        public KeywordFieldType(String name) {
+            this(name, true, true, Collections.emptyMap());
+        }
+
         public KeywordFieldType(String name, boolean isIndexed, boolean hasDocValues, Map<String, String> meta) {
             super(name, isIndexed, false, hasDocValues, TextSearchInfo.SIMPLE_MATCH_ONLY, meta);
             this.normalizer = Lucene.KEYWORD_ANALYZER;
-            this.ignoreAbove = Integer.MAX_VALUE;
+            this.ignoreAbove = IGNORE_ABOVE_DEFAULT;
             this.nullValue = null;
             this.eagerGlobalOrdinals = false;
             this.scriptValues = null;
@@ -466,10 +491,6 @@ public KeywordFieldType(String name, boolean isIndexed, boolean hasDocValues, Ma
             this.originalName = null;
         }
 
-        public KeywordFieldType(String name) {
-            this(name, true, true, Collections.emptyMap());
-        }
-
         public KeywordFieldType(String name, FieldType fieldType) {
             super(
                 name,
@@ -480,7 +501,7 @@ public KeywordFieldType(String name, FieldType fieldType) {
                 Collections.emptyMap()
             );
             this.normalizer = Lucene.KEYWORD_ANALYZER;
-            this.ignoreAbove = Integer.MAX_VALUE;
+            this.ignoreAbove = IGNORE_ABOVE_DEFAULT;
             this.nullValue = null;
             this.eagerGlobalOrdinals = false;
             this.scriptValues = null;
@@ -492,7 +513,7 @@ public KeywordFieldType(String name, FieldType fieldType) {
         public KeywordFieldType(String name, NamedAnalyzer analyzer) {
             super(name, true, false, true, textSearchInfo(Defaults.FIELD_TYPE, null, analyzer, analyzer), Collections.emptyMap());
             this.normalizer = Lucene.KEYWORD_ANALYZER;
-            this.ignoreAbove = Integer.MAX_VALUE;
+            this.ignoreAbove = IGNORE_ABOVE_DEFAULT;
             this.nullValue = null;
             this.eagerGlobalOrdinals = false;
             this.scriptValues = null;
@@ -800,10 +821,7 @@ protected String parseSourceValue(Object value) {
         }
 
         private String applyIgnoreAboveAndNormalizer(String value) {
-            if (value.length() > ignoreAbove) {
-                return null;
-            }
-
+            if (ignoreAbove.isIgnored(value)) return null;
             return normalizeValue(normalizer(), name(), value);
         }
 
@@ -922,7 +940,7 @@ public CollapseType collapseType() {
 
         /** Values that have more chars than the return value of this method will
          *  be skipped at parsing time. */
-        public int ignoreAbove() {
+        public IgnoreAbove ignoreAbove() {
             return ignoreAbove;
         }
 
@@ -974,7 +992,7 @@ public String originalName() {
 
     private final IndexAnalyzers indexAnalyzers;
     private final int ignoreAboveDefault;
-    private final int ignoreAbove;
+    private final IndexMode indexMode;
     private final String offsetsFieldName;
     private final SourceKeepMode indexSourceKeepMode;
     private final String originalName;
@@ -1003,7 +1021,7 @@ private KeywordFieldMapper(
         this.indexCreatedVersion = builder.indexCreatedVersion;
         this.isSyntheticSource = isSyntheticSource;
         this.ignoreAboveDefault = builder.ignoreAboveDefault;
-        this.ignoreAbove = builder.ignoreAbove.getValue();
+        this.indexMode = builder.indexMode;
         this.offsetsFieldName = offsetsFieldName;
         this.indexSourceKeepMode = indexSourceKeepMode;
         this.originalName = mappedFieldType.originalName();
@@ -1060,7 +1078,7 @@ private boolean indexValue(DocumentParserContext context, XContentString value)
             return false;
         }
 
-        if (value.stringLength() > fieldType().ignoreAbove()) {
+        if (fieldType().ignoreAbove().isIgnored(value)) {
             context.addIgnoredField(fullPath());
             if (isSyntheticSource) {
                 // Save a copy of the field so synthetic source can load it
@@ -1151,9 +1169,15 @@ public Map<String, NamedAnalyzer> indexAnalyzers() {
 
     @Override
     public FieldMapper.Builder getMergeBuilder() {
-        return new Builder(leafName(), indexAnalyzers, scriptCompiler, ignoreAboveDefault, indexCreatedVersion, indexSourceKeepMode)
-            .dimension(fieldType().isDimension())
-            .init(this);
+        return new Builder(
+            leafName(),
+            indexAnalyzers,
+            scriptCompiler,
+            ignoreAboveDefault,
+            indexCreatedVersion,
+            indexMode,
+            indexSourceKeepMode
+        ).dimension(fieldType().isDimension()).init(this);
     }
 
     @Override
@@ -1216,7 +1240,7 @@ protected BytesRef preserve(BytesRef value) {
             }
         }
 
-        if (fieldType().ignoreAbove != Integer.MAX_VALUE) {
+        if (fieldType().ignoreAbove.isSet()) {
             layers.add(new CompositeSyntheticFieldLoader.StoredFieldLayer(originalName) {
                 @Override
                 protected void writeValue(Object value, XContentBuilder b) throws IOException {