[Backport 2.x] Support scripting for composite aggs in concurrent segment search

CHANGELOG.md

@@ -10,6 +10,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Add basic aggregation support for derived fields ([#14618](https://github.com/opensearch-project/OpenSearch/pull/14618))
 - Add ThreadContextPermission for markAsSystemContext and allow core to perform the method ([#15016](https://github.com/opensearch-project/OpenSearch/pull/15016))
 - Add ThreadContextPermission for stashAndMergeHeaders and stashWithOrigin ([#15039](https://github.com/opensearch-project/OpenSearch/pull/15039))
+- [Concurrent Segment Search] Support composite aggregations with scripting ([#15072](https://github.com/opensearch-project/OpenSearch/pull/15072))
 - Add `rangeQuery` and `regexpQuery` for `constant_keyword` field type ([#14711](https://github.com/opensearch-project/OpenSearch/pull/14711))
 
 ### Dependencies

modules/lang-painless/build.gradle

@@ -33,6 +33,7 @@ import com.github.jengelman.gradle.plugins.shadow.ShadowBasePlugin
 
 apply plugin: 'opensearch.validate-rest-spec'
 apply plugin: 'opensearch.yaml-rest-test'
+apply plugin: 'opensearch.internal-cluster-test'
 
 opensearchplugin {
   description 'An easy, safe and fast scripting language for OpenSearch'

modules/lang-painless/src/internalClusterTest/java/org/opensearch/painless/SimplePainlessIT.java

@@ -0,0 +1,231 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+package org.opensearch.painless;
+
+import com.carrotsearch.randomizedtesting.annotations.ParametersFactory;
+
+import org.opensearch.action.search.SearchRequest;
+import org.opensearch.action.search.SearchResponse;
+import org.opensearch.action.support.WriteRequest;
+import org.opensearch.cluster.metadata.IndexMetadata;
+import org.opensearch.common.settings.Settings;
+import org.opensearch.common.xcontent.XContentFactory;
+import org.opensearch.core.xcontent.MediaTypeRegistry;
+import org.opensearch.core.xcontent.XContentBuilder;
+import org.opensearch.index.query.TermsQueryBuilder;
+import org.opensearch.plugins.Plugin;
+import org.opensearch.script.Script;
+import org.opensearch.script.ScriptType;
+import org.opensearch.search.aggregations.AggregationBuilder;
+import org.opensearch.search.aggregations.AggregationBuilders;
+import org.opensearch.search.aggregations.bucket.composite.InternalComposite;
+import org.opensearch.search.aggregations.bucket.composite.TermsValuesSourceBuilder;
+import org.opensearch.search.aggregations.bucket.terms.Terms;
+import org.opensearch.search.aggregations.bucket.terms.TermsAggregationBuilder;
+import org.opensearch.search.builder.SearchSourceBuilder;
+import org.opensearch.test.OpenSearchIntegTestCase;
+import org.opensearch.test.ParameterizedStaticSettingsOpenSearchIntegTestCase;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
+
+import static org.opensearch.index.query.QueryBuilders.matchAllQuery;
+import static org.opensearch.search.SearchService.CLUSTER_CONCURRENT_SEGMENT_SEARCH_SETTING;
+import static org.opensearch.search.SearchService.CONCURRENT_SEGMENT_SEARCH_TARGET_MAX_SLICE_COUNT_SETTING;
+import static org.opensearch.test.hamcrest.OpenSearchAssertions.assertAcked;
+import static org.opensearch.test.hamcrest.OpenSearchAssertions.assertSearchResponse;
+
+@OpenSearchIntegTestCase.SuiteScopeTestCase
+public class SimplePainlessIT extends ParameterizedStaticSettingsOpenSearchIntegTestCase {
+
+    public SimplePainlessIT(Settings nodeSettings) {
+        super(nodeSettings);
+    }
+
+    @ParametersFactory
+    public static Collection<Object[]> parameters() {
+        return Arrays.asList(
+            new Object[] { Settings.builder().put(CLUSTER_CONCURRENT_SEGMENT_SEARCH_SETTING.getKey(), true).build() },
+            new Object[] { Settings.builder().put(CLUSTER_CONCURRENT_SEGMENT_SEARCH_SETTING.getKey(), false).build() }
+        );
+    }
+
+    @Override
+    protected Collection<Class<? extends Plugin>> nodePlugins() {
+        return List.of(PainlessPlugin.class);
+    }
+
+    @Override
+    protected Settings nodeSettings(int nodeOrdinal) {
+        return Settings.builder()
+            .put(super.nodeSettings(nodeOrdinal))
+            .put(CONCURRENT_SEGMENT_SEARCH_TARGET_MAX_SLICE_COUNT_SETTING.getKey(), "4")
+            .build();
+    }
+
+    @Override
+    public void setupSuiteScopeCluster() throws Exception {
+        XContentBuilder xContentBuilder = XContentFactory.jsonBuilder()
+            .startObject()
+            .field("dynamic", "false")
+            .startObject("_meta")
+            .field("schema_version", 5)
+            .endObject()
+            .startObject("properties")
+            .startObject("entity")
+            .field("type", "nested")
+            .endObject()
+            .endObject()
+            .endObject();
+
+        assertAcked(
+            prepareCreate("test").setMapping(xContentBuilder)
+                .setSettings(
+                    Settings.builder().put(IndexMetadata.SETTING_NUMBER_OF_SHARDS, 1).put(IndexMetadata.SETTING_NUMBER_OF_REPLICAS, 0)
+                )
+        );
+
+        assertAcked(
+            prepareCreate("test-df").setSettings(
+                Settings.builder().put(IndexMetadata.SETTING_NUMBER_OF_SHARDS, 1).put(IndexMetadata.SETTING_NUMBER_OF_REPLICAS, 0)
+            )
+        );
+
+        client().prepareIndex("test")
+            .setId("a")
+            .setSource(
+                "{\"entity\":[{\"name\":\"ip-field\",\"value\":\"1.2.3.4\"},{\"name\":\"keyword-field\",\"value\":\"field-1\"}]}",
+                MediaTypeRegistry.JSON
+            )
+            .setRefreshPolicy(WriteRequest.RefreshPolicy.IMMEDIATE)
+            .get();
+        client().prepareIndex("test")
+            .setId("b")
+            .setSource(
+                "{\"entity\":[{\"name\":\"ip-field\",\"value\":\"5.6.7.8\"},{\"name\":\"keyword-field\",\"value\":\"field-2\"}]}",
+                MediaTypeRegistry.JSON
+            )
+            .setRefreshPolicy(WriteRequest.RefreshPolicy.IMMEDIATE)
+            .get();
+        client().prepareIndex("test")
+            .setId("c")
+            .setSource(
+                "{\"entity\":[{\"name\":\"ip-field\",\"value\":\"1.6.3.8\"},{\"name\":\"keyword-field\",\"value\":\"field-2\"}]}",
+                MediaTypeRegistry.JSON
+            )
+            .setRefreshPolicy(WriteRequest.RefreshPolicy.IMMEDIATE)
+            .get();
+        client().prepareIndex("test")
+            .setId("d")
+            .setSource(
+                "{\"entity\":[{\"name\":\"ip-field\",\"value\":\"2.6.4.8\"},{\"name\":\"keyword-field\",\"value\":\"field-2\"}]}",
+                MediaTypeRegistry.JSON
+            )
+            .setRefreshPolicy(WriteRequest.RefreshPolicy.IMMEDIATE)
+            .get();
+        ensureSearchable("test");
+
+        client().prepareIndex("test-df")
+            .setId("a")
+            .setSource("{\"field\":\"value1\"}", MediaTypeRegistry.JSON)
+            .setRefreshPolicy(WriteRequest.RefreshPolicy.IMMEDIATE)
+            .get();
+        client().prepareIndex("test-df")
+            .setId("b")
+            .setSource("{\"field\":\"value2\"}", MediaTypeRegistry.JSON)
+            .setRefreshPolicy(WriteRequest.RefreshPolicy.IMMEDIATE)
+            .get();
+        client().prepareIndex("test-df")
+            .setId("c")
+            .setSource("{\"field\":\"value3\"}", MediaTypeRegistry.JSON)
+            .setRefreshPolicy(WriteRequest.RefreshPolicy.IMMEDIATE)
+            .get();
+        client().prepareIndex("test-df")
+            .setId("d")
+            .setSource("{\"field\":\"value1\"}", MediaTypeRegistry.JSON)
+            .setRefreshPolicy(WriteRequest.RefreshPolicy.IMMEDIATE)
+            .get();
+        ensureSearchable("test");
+    }
+
+    public void testTermsValuesSource() throws Exception {
+        AggregationBuilder agg = AggregationBuilders.composite(
+            "multi_buckets",
+            Collections.singletonList(
+                new TermsValuesSourceBuilder("keyword-field").script(
+                    new Script(
+                        ScriptType.INLINE,
+                        "painless",
+                        "String value = null; if (params == null || params._source == null || params._source.entity == null) { return \"\"; } for (item in params._source.entity) { if (item[\"name\"] == \"keyword-field\") { value = item['value']; break; } } return value;",
+                        Collections.emptyMap()
+                    )
+                )
+            )
+        );
+        SearchResponse response = client().prepareSearch("test").setQuery(matchAllQuery()).addAggregation(agg).get();
+
+        assertSearchResponse(response);
+        assertEquals(2, ((InternalComposite) response.getAggregations().get("multi_buckets")).getBuckets().size());
+        assertEquals(
+            "field-1",
+            ((InternalComposite) response.getAggregations().get("multi_buckets")).getBuckets().get(0).getKey().get("keyword-field")
+        );
+        assertEquals(1, ((InternalComposite) response.getAggregations().get("multi_buckets")).getBuckets().get(0).getDocCount());
+        assertEquals(
+            "field-2",
+            ((InternalComposite) response.getAggregations().get("multi_buckets")).getBuckets().get(1).getKey().get("keyword-field")
+        );
+        assertEquals(3, ((InternalComposite) response.getAggregations().get("multi_buckets")).getBuckets().get(1).getDocCount());
+    }
+
+    public void testSimpleDerivedFieldsQuery() {
+        assumeFalse(
+            "Derived fields do not support concurrent search https://github.com/opensearch-project/OpenSearch/issues/15007",
+            internalCluster().clusterService().getClusterSettings().get(CLUSTER_CONCURRENT_SEGMENT_SEARCH_SETTING)
+        );
+        SearchRequest searchRequest = new SearchRequest("test-df").source(
+            SearchSourceBuilder.searchSource()
+                .derivedField("result", "keyword", new Script("emit(params._source[\"field\"])"))
+                .fetchField("result")
+                .query(new TermsQueryBuilder("result", "value1"))
+        );
+        SearchResponse response = client().search(searchRequest).actionGet();
+        assertSearchResponse(response);
+        assertEquals(2, Objects.requireNonNull(response.getHits().getTotalHits()).value);
+    }
+
+    public void testSimpleDerivedFieldsAgg() {
+        assumeFalse(
+            "Derived fields do not support concurrent search https://github.com/opensearch-project/OpenSearch/issues/15007",
+            internalCluster().clusterService().getClusterSettings().get(CLUSTER_CONCURRENT_SEGMENT_SEARCH_SETTING)
+        );
+        SearchRequest searchRequest = new SearchRequest("test-df").source(
+            SearchSourceBuilder.searchSource()
+                .derivedField("result", "keyword", new Script("emit(params._source[\"field\"])"))
+                .fetchField("result")
+                .aggregation(new TermsAggregationBuilder("derived-agg").field("result"))
+        );
+        SearchResponse response = client().search(searchRequest).actionGet();
+        assertSearchResponse(response);
+        Terms aggResponse = response.getAggregations().get("derived-agg");
+        assertEquals(3, aggResponse.getBuckets().size());
+        Terms.Bucket bucket = aggResponse.getBuckets().get(0);
+        assertEquals("value1", bucket.getKey());
+        assertEquals(2, bucket.getDocCount());
+        bucket = aggResponse.getBuckets().get(1);
+        assertEquals("value2", bucket.getKey());
+        assertEquals(1, bucket.getDocCount());
+        bucket = aggResponse.getBuckets().get(2);
+        assertEquals("value3", bucket.getKey());
+        assertEquals(1, bucket.getDocCount());
+    }
+}

server/src/main/java/org/opensearch/search/aggregations/bucket/composite/CompositeAggregationFactory.java

@@ -40,7 +40,6 @@
 import org.opensearch.search.internal.SearchContext;
 
 import java.io.IOException;
-import java.util.Arrays;
 import java.util.Map;
 
 /**
@@ -81,7 +80,6 @@
 
     @Override
     protected boolean supportsConcurrentSegmentSearch() {
-        // Disable concurrent search if any scripting is used. See https://github.com/opensearch-project/OpenSearch/issues/12331 for details
-        return Arrays.stream(sources).noneMatch(CompositeValuesSourceConfig::hasScript);
+        return true;
     }
 }

server/src/main/java/org/opensearch/search/lookup/SearchLookup.java

@@ -153,14 +153,25 @@ public final SearchLookup forkAndTrackFieldReferences(String field) {
         return new SearchLookup(this, newFieldChain);
     }
 
+    /**
+     * SourceLookup is not thread safe, so we create a new instance for each leaf to support concurrent segment search
+     */
     public LeafSearchLookup getLeafSearchLookup(LeafReaderContext context) {
-        return new LeafSearchLookup(context, docMap.getLeafDocLookup(context), sourceLookup, fieldsLookup.getLeafFieldsLookup(context));
+        return new LeafSearchLookup(
+            context,
+            docMap.getLeafDocLookup(context),
+            new SourceLookup(),
+            fieldsLookup.getLeafFieldsLookup(context)
+        );
     }
 
     public DocLookup doc() {
         return docMap;
     }
 
+    /**
+     * Returned SourceLookup will be unrelated to any created LeafSearchLookups. Instead, use {@link LeafSearchLookup#source()} to access the related {@link SearchLookup}.
+     */
     public SourceLookup source() {
         return sourceLookup;
     }

server/src/main/java/org/opensearch/search/lookup/SourceLookup.java

@@ -57,7 +57,7 @@
 import static java.util.Collections.emptyMap;
 
 /**
- * Orchestrator class for source lookups
+ * Orchestrator class for source lookups. Not thread safe.
  *
  * @opensearch.api
  */