Fix TextFieldMapper Retaining a Reference to its Builder (#77251)

Fixes the text field mapper and the analyzers class that also retained parameter references that go really heavy.
Makes `TextFieldMapper` take hundreds of bytes compared to multiple kb per instance.

closes #73845

Author: original-brownbear

modules/mapper-extras/src/main/java/org/elasticsearch/index/mapper/MatchOnlyTextFieldMapper.java

@@ -86,7 +86,9 @@ public Builder(String name, IndexAnalyzers indexAnalyzers) {
         public Builder(String name, Version indexCreatedVersion, IndexAnalyzers indexAnalyzers) {
             super(name);
             this.indexCreatedVersion = indexCreatedVersion;
-            this.analyzers = new TextParams.Analyzers(indexAnalyzers, m -> ((MatchOnlyTextFieldMapper) m).analyzers);
+            this.analyzers = new TextParams.Analyzers(indexAnalyzers,
+                    m -> ((MatchOnlyTextFieldMapper) m).indexAnalyzer,
+                    m -> ((MatchOnlyTextFieldMapper) m).positionIncrementGap);
         }
 
         @Override
@@ -268,7 +270,9 @@ public IndexFieldData.Builder fielddataBuilder(String fullyQualifiedIndexName, S
     }
 
     private final Version indexCreatedVersion;
-    private final TextParams.Analyzers analyzers;
+    private final IndexAnalyzers indexAnalyzers;
+    private final NamedAnalyzer indexAnalyzer;
+    private final int positionIncrementGap;
     private final FieldType fieldType;
 
     private MatchOnlyTextFieldMapper(
@@ -284,12 +288,14 @@ private MatchOnlyTextFieldMapper(
         assert mappedFieldType.hasDocValues() == false;
         this.fieldType = fieldType;
         this.indexCreatedVersion = builder.indexCreatedVersion;
-        this.analyzers = builder.analyzers;
+        this.indexAnalyzers = builder.analyzers.indexAnalyzers;
+        this.indexAnalyzer = builder.analyzers.getIndexAnalyzer();
+        this.positionIncrementGap = builder.analyzers.positionIncrementGap.getValue();
     }
 
     @Override
     public FieldMapper.Builder getMergeBuilder() {
-        return new Builder(simpleName(), indexCreatedVersion, analyzers.indexAnalyzers).init(this);
+        return new Builder(simpleName(), indexCreatedVersion, indexAnalyzers).init(this);
     }
 
     @Override

modules/mapper-extras/src/main/java/org/elasticsearch/index/mapper/SearchAsYouTypeFieldMapper.java

@@ -125,7 +125,11 @@ public static class Builder extends FieldMapper.Builder {
 
         public Builder(String name, IndexAnalyzers indexAnalyzers) {
             super(name);
-            this.analyzers = new TextParams.Analyzers(indexAnalyzers, m -> builder(m).analyzers);
+            this.analyzers = new TextParams.Analyzers(
+                    indexAnalyzers,
+                    m -> builder(m).analyzers.getIndexAnalyzer(),
+                    m -> builder(m).analyzers.positionIncrementGap.getValue()
+            );
         }
 
         @Override

plugins/mapper-annotated-text/src/main/java/org/elasticsearch/index/mapper/annotatedtext/AnnotatedTextFieldMapper.java

@@ -86,7 +86,9 @@ public static class Builder extends FieldMapper.Builder {
 
         public Builder(String name, IndexAnalyzers indexAnalyzers) {
             super(name);
-            this.analyzers = new TextParams.Analyzers(indexAnalyzers, m -> builder(m).analyzers);
+            this.analyzers = new TextParams.Analyzers(indexAnalyzers,
+                    m -> builder(m).analyzers.getIndexAnalyzer(),
+                    m -> builder(m).analyzers.positionIncrementGap.getValue());
         }
 
         @Override

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

@@ -106,10 +106,6 @@ public static class Defaults {
         public static final int POSITION_INCREMENT_GAP = 100;
     }
 
-    private static Builder builder(FieldMapper in) {
-        return ((TextFieldMapper) in).builder;
-    }
-
     private static final class PrefixConfig implements ToXContent {
         final int minChars;
         final int maxChars;
@@ -229,27 +225,26 @@ public static class Builder extends FieldMapper.Builder {
 
         private final Version indexCreatedVersion;
 
-        private final Parameter<Boolean> index = Parameter.indexParam(m -> builder(m).index.getValue(), true);
-        private final Parameter<Boolean> store = Parameter.storeParam(m -> builder(m).store.getValue(), false);
+        private final Parameter<Boolean> index = Parameter.indexParam(m -> ((TextFieldMapper) m).index, true);
+        private final Parameter<Boolean> store = Parameter.storeParam(m -> ((TextFieldMapper) m).store, false);
 
-        final Parameter<SimilarityProvider> similarity
-            = TextParams.similarity(m -> builder(m).similarity.getValue());
+        final Parameter<SimilarityProvider> similarity = TextParams.similarity(m -> ((TextFieldMapper) m).similarity);
 
-        final Parameter<String> indexOptions = TextParams.indexOptions(m -> builder(m).indexOptions.getValue());
-        final Parameter<Boolean> norms = TextParams.norms(true, m -> builder(m).norms.getValue());
-        final Parameter<String> termVectors = TextParams.termVectors(m -> builder(m).termVectors.getValue());
+        final Parameter<String> indexOptions = TextParams.indexOptions(m -> ((TextFieldMapper) m).indexOptions);
+        final Parameter<Boolean> norms = TextParams.norms(true, m -> ((TextFieldMapper) m).norms);
+        final Parameter<String> termVectors = TextParams.termVectors(m -> ((TextFieldMapper) m).termVectors);
 
         final Parameter<Boolean> fieldData
-            = Parameter.boolParam("fielddata", true, m -> builder(m).fieldData.getValue(), false);
+            = Parameter.boolParam("fielddata", true, m -> ((TextFieldMapper) m).fieldData, false);
         final Parameter<FielddataFrequencyFilter> freqFilter = new Parameter<>("fielddata_frequency_filter", true,
-            () -> DEFAULT_FILTER, TextFieldMapper::parseFrequencyFilter, m -> builder(m).freqFilter.getValue());
+            () -> DEFAULT_FILTER, TextFieldMapper::parseFrequencyFilter, m -> ((TextFieldMapper) m).freqFilter);
         final Parameter<Boolean> eagerGlobalOrdinals
-            = Parameter.boolParam("eager_global_ordinals", true, m -> builder(m).eagerGlobalOrdinals.getValue(), false);
+            = Parameter.boolParam("eager_global_ordinals", true, m -> ((TextFieldMapper) m).eagerGlobalOrdinals, false);
 
         final Parameter<Boolean> indexPhrases
-            = Parameter.boolParam("index_phrases", false, m -> builder(m).indexPhrases.getValue(), false);
+            = Parameter.boolParam("index_phrases", false, m -> ((TextFieldMapper) m).indexPhrases, false);
         final Parameter<PrefixConfig> indexPrefixes = new Parameter<>("index_prefixes", false,
-            () -> null, TextFieldMapper::parsePrefixConfig, m -> builder(m).indexPrefixes.getValue()).acceptsNull();
+            () -> null, TextFieldMapper::parsePrefixConfig, m -> ((TextFieldMapper) m).indexPrefixes).acceptsNull();
 
         private final Parameter<Map<String, String>> meta = Parameter.metaParam();
 
@@ -262,7 +257,11 @@ public Builder(String name, IndexAnalyzers indexAnalyzers) {
         public Builder(String name, Version indexCreatedVersion, IndexAnalyzers indexAnalyzers) {
             super(name);
             this.indexCreatedVersion = indexCreatedVersion;
-            this.analyzers = new TextParams.Analyzers(indexAnalyzers, m -> builder(m).analyzers);
+            this.analyzers = new TextParams.Analyzers(
+                    indexAnalyzers,
+                    m -> ((TextFieldMapper) m).indexAnalyzer,
+                    m -> (((TextFieldMapper) m).positionIncrementGap)
+            );
         }
 
         public Builder index(boolean index) {
@@ -820,7 +819,21 @@ public IndexFieldData.Builder fielddataBuilder(String fullyQualifiedIndexName, S
 
     }
 
-    private final Builder builder;
+    private final Version indexCreatedVersion;
+    private final boolean index;
+    private final boolean store;
+    private final String indexOptions;
+    private final boolean norms;
+    private final String termVectors;
+    private final SimilarityProvider similarity;
+    private final NamedAnalyzer indexAnalyzer;
+    private final IndexAnalyzers indexAnalyzers;
+    private final int positionIncrementGap;
+    private final boolean eagerGlobalOrdinals;
+    private final PrefixConfig indexPrefixes;
+    private final FielddataFrequencyFilter freqFilter;
+    private final boolean fieldData;
+    private final boolean indexPhrases;
     private final FieldType fieldType;
     private final SubFieldInfo prefixFieldInfo;
     private final SubFieldInfo phraseFieldInfo;
@@ -840,12 +853,26 @@ protected TextFieldMapper(String simpleName, FieldType fieldType,
         this.fieldType = fieldType;
         this.prefixFieldInfo = prefixFieldInfo;
         this.phraseFieldInfo = phraseFieldInfo;
-        this.builder = builder;
+        this.indexCreatedVersion = builder.indexCreatedVersion;
+        this.indexAnalyzer = builder.analyzers.getIndexAnalyzer();
+        this.indexAnalyzers = builder.analyzers.indexAnalyzers;
+        this.positionIncrementGap = builder.analyzers.positionIncrementGap.getValue();
+        this.index = builder.index.getValue();
+        this.store = builder.store.getValue();
+        this.similarity = builder.similarity.getValue();
+        this.indexOptions = builder.indexOptions.getValue();
+        this.norms = builder.norms.getValue();
+        this.termVectors = builder.termVectors.getValue();
+        this.eagerGlobalOrdinals = builder.eagerGlobalOrdinals.getValue();
+        this.indexPrefixes = builder.indexPrefixes.getValue();
+        this.freqFilter = builder.freqFilter.getValue();
+        this.fieldData = builder.fieldData.get();
+        this.indexPhrases = builder.indexPhrases.getValue();
     }
 
     @Override
     public FieldMapper.Builder getMergeBuilder() {
-        return new Builder(simpleName(), builder.indexCreatedVersion, builder.analyzers.indexAnalyzers).init(this);
+        return new Builder(simpleName(), indexCreatedVersion, indexAnalyzers).init(this);
     }
 
     @Override
@@ -1003,23 +1030,24 @@ protected void doXContentBody(XContentBuilder builder, Params params) throws IOE
         // this is a pain, but we have to do this to maintain BWC
         boolean includeDefaults = params.paramAsBoolean("include_defaults", false);
         builder.field("type", contentType());
-        this.builder.index.toXContent(builder, includeDefaults);
-        this.builder.store.toXContent(builder, includeDefaults);
+        final Builder b = (Builder) getMergeBuilder();
+        b.index.toXContent(builder, includeDefaults);
+        b.store.toXContent(builder, includeDefaults);
         this.multiFields.toXContent(builder, params);
         this.copyTo.toXContent(builder, params);
-        this.builder.meta.toXContent(builder, includeDefaults);
-        this.builder.indexOptions.toXContent(builder, includeDefaults);
-        this.builder.termVectors.toXContent(builder, includeDefaults);
-        this.builder.norms.toXContent(builder, includeDefaults);
-        this.builder.analyzers.indexAnalyzer.toXContent(builder, includeDefaults);
-        this.builder.analyzers.searchAnalyzer.toXContent(builder, includeDefaults);
-        this.builder.analyzers.searchQuoteAnalyzer.toXContent(builder, includeDefaults);
-        this.builder.similarity.toXContent(builder, includeDefaults);
-        this.builder.eagerGlobalOrdinals.toXContent(builder, includeDefaults);
-        this.builder.analyzers.positionIncrementGap.toXContent(builder, includeDefaults);
-        this.builder.fieldData.toXContent(builder, includeDefaults);
-        this.builder.freqFilter.toXContent(builder, includeDefaults);
-        this.builder.indexPrefixes.toXContent(builder, includeDefaults);
-        this.builder.indexPhrases.toXContent(builder, includeDefaults);
+        b.meta.toXContent(builder, includeDefaults);
+        b.indexOptions.toXContent(builder, includeDefaults);
+        b.termVectors.toXContent(builder, includeDefaults);
+        b.norms.toXContent(builder, includeDefaults);
+        b.analyzers.indexAnalyzer.toXContent(builder, includeDefaults);
+        b.analyzers.searchAnalyzer.toXContent(builder, includeDefaults);
+        b.analyzers.searchQuoteAnalyzer.toXContent(builder, includeDefaults);
+        b.similarity.toXContent(builder, includeDefaults);
+        b.eagerGlobalOrdinals.toXContent(builder, includeDefaults);
+        b.analyzers.positionIncrementGap.toXContent(builder, includeDefaults);
+        b.fieldData.toXContent(builder, includeDefaults);
+        b.freqFilter.toXContent(builder, includeDefaults);
+        b.indexPrefixes.toXContent(builder, includeDefaults);
+        b.indexPhrases.toXContent(builder, includeDefaults);
     }
 }

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

@@ -36,9 +36,10 @@ public static final class Analyzers {
         public final IndexAnalyzers indexAnalyzers;
 
         public Analyzers(IndexAnalyzers indexAnalyzers,
-                         Function<FieldMapper, Analyzers> analyzerInitFunction) {
+                         Function<FieldMapper, NamedAnalyzer> analyzerInitFunction,
+                         Function<FieldMapper, Integer> positionGapInitFunction) {
             this.indexAnalyzer = Parameter.analyzerParam("analyzer", false,
-                m -> analyzerInitFunction.apply(m).indexAnalyzer.get(), indexAnalyzers::getDefaultIndexAnalyzer)
+                            analyzerInitFunction, indexAnalyzers::getDefaultIndexAnalyzer)
                 .setSerializerCheck((id, ic, a) -> id || ic ||
                     Objects.equals(a, getSearchAnalyzer()) == false || Objects.equals(a, getSearchQuoteAnalyzer()) == false)
                 .addValidator(a -> a.checkAllowedInMode(AnalysisMode.INDEX_TIME));
@@ -68,7 +69,7 @@ public Analyzers(IndexAnalyzers indexAnalyzers,
                 })
                 .addValidator(a -> a.checkAllowedInMode(AnalysisMode.SEARCH_TIME));
             this.positionIncrementGap = Parameter.intParam("position_increment_gap", false,
-                m -> analyzerInitFunction.apply(m).positionIncrementGap.get(), TextFieldMapper.Defaults.POSITION_INCREMENT_GAP)
+                        positionGapInitFunction, TextFieldMapper.Defaults.POSITION_INCREMENT_GAP)
                 .addValidator(v -> {
                     if (v < 0) {
                         throw new MapperParsingException("[position_increment_gap] must be positive, got [" + v + "]");