EQL: Hook engine to Elasticsearch (#52828)

Add query execution and return actual results returned from
Elasticsearch inside the tests

(cherry picked from commit 3e039282bf991af87604a6d4f8eada19d5e33842)

client/rest-high-level/src/test/java/org/elasticsearch/client/EqlIT.java

@@ -19,6 +19,8 @@
 
 package org.elasticsearch.client;
 
+import org.apache.http.client.methods.HttpPost;
+import org.apache.http.client.methods.HttpPut;
 import org.elasticsearch.client.eql.EqlSearchRequest;
 import org.elasticsearch.client.eql.EqlSearchResponse;
 import org.junit.Before;
@@ -33,9 +35,23 @@ public class EqlIT extends ESRestHighLevelClientTestCase {
     }
 
     public void testBasicSearch() throws Exception {
+
+        Request doc1 = new Request(HttpPut.METHOD_NAME, "/index/_doc/1");
+        doc1.setJsonEntity("{\"event_subtype_full\": \"already_running\", " +
+                "\"event_type\": \"process\", " +
+                "\"event_type_full\": \"process_event\", " +
+                "\"opcode\": 3," +
+                "\"pid\": 0," +
+                "\"process_name\": \"System Idle Process\"," +
+                "\"serial_event_id\": 1," +
+                "\"subtype\": \"create\"," +
+                "\"timestamp\": 116444736000000000," +
+                "\"unique_pid\": 1}");
+        client().performRequest(doc1);
+        client().performRequest(new Request(HttpPost.METHOD_NAME, "/_refresh"));
+
         EqlClient eql = highLevelClient().eql();
-        // TODO: Add real checks when end-to-end basic functionality is implemented
-        EqlSearchRequest request = new EqlSearchRequest("test", "test");
+        EqlSearchRequest request = new EqlSearchRequest("index", "process where true");
         EqlSearchResponse response = execute(request, eql::search, eql::searchAsync);
         assertNotNull(response);
         assertFalse(response.isTimeout());

docs/reference/eql/search.asciidoc

@@ -34,6 +34,7 @@ specified in the `rule` parameter. The EQL query matches events with an
 ----
 GET sec_logs/_eql/search
 {
+  "event_type_field": "event.category",
   "rule": """
     process where process.name == "cmd.exe"
   """

x-pack/plugin/eql/qa/rest/src/test/resources/rest-api-spec/test/eql/10_basic.yml

@@ -7,13 +7,11 @@ setup:
           - index:
               _index: eql_test
               _id:    1
-          - str: test1
-            int: 1
+          - event_type: process
+            user: SYSTEM
 
 ---
 # Testing round-trip and the basic shape of the response
-# Currently not implemented or wired and always returns empty result.
-# TODO: define more test once everything is wired up
 "Execute some EQL.":
   - do:
       eql.search:
@@ -22,6 +20,7 @@ setup:
           rule: "process where user = 'SYSTEM'"
 
   - match: {timed_out: false}
-  - match: {took: 0}
   - match: {hits.total.value: 1}
+  - match: {hits.total.relation: "eq"}
+  - match: {hits.events.0._source.user: "SYSTEM"}
 

x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/execution/search/Querier.java

@@ -0,0 +1,96 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+package org.elasticsearch.xpack.eql.execution.search;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.elasticsearch.action.ActionListener;
+import org.elasticsearch.action.search.SearchRequest;
+import org.elasticsearch.action.search.SearchResponse;
+import org.elasticsearch.client.Client;
+import org.elasticsearch.common.Strings;
+import org.elasticsearch.common.unit.TimeValue;
+import org.elasticsearch.index.query.QueryBuilder;
+import org.elasticsearch.search.aggregations.Aggregation;
+import org.elasticsearch.search.builder.SearchSourceBuilder;
+import org.elasticsearch.xpack.eql.querydsl.container.QueryContainer;
+import org.elasticsearch.xpack.eql.session.Configuration;
+import org.elasticsearch.xpack.eql.session.EqlSession;
+import org.elasticsearch.xpack.eql.session.Results;
+import org.elasticsearch.xpack.ql.expression.Attribute;
+import org.elasticsearch.xpack.ql.index.IndexResolver;
+import org.elasticsearch.xpack.ql.util.StringUtils;
+
+import java.util.Collections;
+import java.util.List;
+
+public class Querier {
+
+    private static final Logger log = LogManager.getLogger(Querier.class);
+
+    private final Configuration cfg;
+    private final Client client;
+    private final TimeValue keepAlive;
+    private final QueryBuilder filter;
+
+
+    public Querier(EqlSession eqlSession) {
+        this.cfg = eqlSession.configuration();
+        this.client = eqlSession.client();
+        this.keepAlive = cfg.requestTimeout();
+        this.filter = cfg.filter();
+    }
+
+
+    public void query(List<Attribute> output, QueryContainer container, String index, ActionListener<Results> listener) {
+        // prepare the request
+        SearchSourceBuilder sourceBuilder = SourceGenerator.sourceBuilder(container, filter, cfg.size());
+
+        // set query timeout
+        sourceBuilder.timeout(cfg.requestTimeout());
+
+        if (log.isTraceEnabled()) {
+            log.trace("About to execute query {} on {}", StringUtils.toString(sourceBuilder), index);
+        }
+        
+        SearchRequest search = prepareRequest(client, sourceBuilder, cfg.requestTimeout(), false,
+                Strings.commaDelimitedListToStringArray(index));
+
+        ActionListener<SearchResponse> l = new SearchAfterListener(listener, client, cfg, output, container, search);
+
+        client.search(search, l);
+    }
+
+    public static SearchRequest prepareRequest(Client client, SearchSourceBuilder source, TimeValue timeout, boolean includeFrozen,
+                                               String... indices) {
+        return client.prepareSearch(indices)
+                // always track total hits accurately
+                .setTrackTotalHits(true)
+                .setAllowPartialSearchResults(false)
+                .setSource(source)
+                .setTimeout(timeout)
+                .setIndicesOptions(
+                        includeFrozen ? IndexResolver.FIELD_CAPS_FROZEN_INDICES_OPTIONS : IndexResolver.FIELD_CAPS_INDICES_OPTIONS)
+                .request();
+    }
+
+    protected static void logSearchResponse(SearchResponse response, Logger logger) {
+        List<Aggregation> aggs = Collections.emptyList();
+        if (response.getAggregations() != null) {
+            aggs = response.getAggregations().asList();
+        }
+        StringBuilder aggsNames = new StringBuilder();
+        for (int i = 0; i < aggs.size(); i++) {
+            aggsNames.append(aggs.get(i).getName() + (i + 1 == aggs.size() ? "" : ", "));
+        }
+
+        logger.trace("Got search response [hits {} {}, {} aggregations: [{}], {} failed shards, {} skipped shards, "
+                + "{} successful shards, {} total shards, took {}, timed out [{}]]", response.getHits().getTotalHits().relation.toString(),
+                response.getHits().getTotalHits().value, aggs.size(), aggsNames, response.getFailedShards(), response.getSkippedShards(),
+                response.getSuccessfulShards(), response.getTotalShards(), response.getTook(), response.isTimedOut());
+    }
+}

x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/execution/search/SearchAfterListener.java

@@ -0,0 +1,128 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+package org.elasticsearch.xpack.eql.execution.search;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.elasticsearch.action.ActionListener;
+import org.elasticsearch.action.search.SearchRequest;
+import org.elasticsearch.action.search.SearchResponse;
+import org.elasticsearch.action.search.ShardSearchFailure;
+import org.elasticsearch.client.Client;
+import org.elasticsearch.common.collect.Tuple;
+import org.elasticsearch.common.util.CollectionUtils;
+import org.elasticsearch.xpack.eql.EqlIllegalArgumentException;
+import org.elasticsearch.xpack.eql.execution.search.extractor.FieldHitExtractor;
+import org.elasticsearch.xpack.eql.querydsl.container.ComputedRef;
+import org.elasticsearch.xpack.eql.querydsl.container.QueryContainer;
+import org.elasticsearch.xpack.eql.querydsl.container.SearchHitFieldRef;
+import org.elasticsearch.xpack.eql.session.Configuration;
+import org.elasticsearch.xpack.eql.session.Results;
+import org.elasticsearch.xpack.ql.execution.search.FieldExtraction;
+import org.elasticsearch.xpack.ql.execution.search.extractor.ComputingExtractor;
+import org.elasticsearch.xpack.ql.execution.search.extractor.HitExtractor;
+import org.elasticsearch.xpack.ql.expression.Attribute;
+import org.elasticsearch.xpack.ql.expression.gen.pipeline.HitExtractorInput;
+import org.elasticsearch.xpack.ql.expression.gen.pipeline.Pipe;
+import org.elasticsearch.xpack.ql.expression.gen.pipeline.ReferenceInput;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Set;
+
+class SearchAfterListener implements ActionListener<SearchResponse> {
+
+    private static final Logger log = LogManager.getLogger(SearchAfterListener.class);
+
+    private final ActionListener<Results> listener;
+
+    private final Client client;
+    private final Configuration cfg;
+    private final List<Attribute> output;
+    private final QueryContainer container;
+    private final SearchRequest request;
+
+    SearchAfterListener(ActionListener<Results> listener, Client client, Configuration cfg, List<Attribute> output,
+                               QueryContainer container, SearchRequest request) {
+
+        this.listener = listener;
+
+        this.client = client;
+        this.cfg = cfg;
+        this.output = output;
+        this.container = container;
+        this.request = request;
+    }
+
+    @Override
+    public void onResponse(SearchResponse response) {
+        try {
+            ShardSearchFailure[] failures = response.getShardFailures();
+            if (CollectionUtils.isEmpty(failures) == false) {
+                listener.onFailure(new EqlIllegalArgumentException(failures[0].reason(), failures[0].getCause()));
+            } else {
+                handleResponse(response, listener);
+            }
+        } catch (Exception ex) {
+            listener.onFailure(ex);
+        }
+    }
+
+    private void handleResponse(SearchResponse response, ActionListener<Results> listener) {
+        // create response extractors for the first time
+        List<Tuple<FieldExtraction, String>> refs = container.fields();
+
+        List<HitExtractor> exts = new ArrayList<>(refs.size());
+        for (Tuple<FieldExtraction, String> ref : refs) {
+            exts.add(createExtractor(ref.v1()));
+        }
+
+        if (log.isTraceEnabled()) {
+            Querier.logSearchResponse(response, log);
+        }
+
+        List<?> results = Arrays.asList(response.getHits().getHits());
+        listener.onResponse(new Results(response.getHits().getTotalHits(), response.getTook(), response.isTimedOut(), results));
+    }
+
+    private HitExtractor createExtractor(FieldExtraction ref) {
+        if (ref instanceof SearchHitFieldRef) {
+            SearchHitFieldRef f = (SearchHitFieldRef) ref;
+            return new FieldHitExtractor(f.name(), f.fullFieldName(), f.getDataType(), cfg.zoneId(), f.useDocValue(), f.hitName(), false);
+        }
+
+        if (ref instanceof ComputedRef) {
+            Pipe proc = ((ComputedRef) ref).processor();
+            // collect hitNames
+            Set<String> hitNames = new LinkedHashSet<>();
+            proc = proc.transformDown(l -> {
+                HitExtractor he = createExtractor(l.context());
+                hitNames.add(he.hitName());
+
+                if (hitNames.size() > 1) {
+                    throw new EqlIllegalArgumentException("Multi-level nested fields [{}] not supported yet", hitNames);
+                }
+
+                return new HitExtractorInput(l.source(), l.expression(), he);
+            }, ReferenceInput.class);
+            String hitName = null;
+            if (hitNames.size() == 1) {
+                hitName = hitNames.iterator().next();
+            }
+            return new ComputingExtractor(proc.asProcessor(), hitName);
+        }
+
+        throw new EqlIllegalArgumentException("Unexpected value reference {}", ref.getClass());
+    }
+
+    @Override
+    public void onFailure(Exception ex) {
+        listener.onFailure(ex);
+    }
+}

x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/execution/search/SourceGenerator.java

@@ -50,6 +50,15 @@ public abstract class SourceGenerator {
         sortBuilder.build(source);
         optimize(sortBuilder, source);
 
+        // set fetch size
+        if (size != null) {
+            int sz = size;
+
+            if (source.size() == -1) {
+                source.size(sz);
+            }
+        }
+
         return source;
     }
 

x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/execution/search/extractor/FieldHitExtractor.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+package org.elasticsearch.xpack.eql.execution.search.extractor;
+
+import org.elasticsearch.common.io.stream.StreamInput;
+import org.elasticsearch.xpack.ql.execution.search.extractor.AbstractFieldHitExtractor;
+import org.elasticsearch.xpack.ql.type.DataType;
+import org.elasticsearch.xpack.ql.util.DateUtils;
+
+import java.io.IOException;
+import java.time.Instant;
+import java.time.ZoneId;
+import java.time.ZonedDateTime;
+import java.util.List;
+
+import static org.elasticsearch.xpack.ql.type.DataTypes.DATETIME;
+
+public class FieldHitExtractor extends AbstractFieldHitExtractor {
+
+    static final String NAME = "f";
+
+    public FieldHitExtractor(StreamInput in) throws IOException {
+        super(in);
+    }
+
+    public FieldHitExtractor(String name, String fullFieldName, DataType dataType, ZoneId zoneId, boolean useDocValue, String hitName,
+                             boolean arrayLeniency) {
+        super(name, fullFieldName, dataType, zoneId, useDocValue, hitName, arrayLeniency);
+    }
+
+    @Override
+    public String getWriteableName() {
+        return NAME;
+    }
+
+    @Override
+    protected ZoneId readZoneId(StreamInput in) throws IOException {
+        return DateUtils.UTC;
+    }
+
+    @Override
+    protected Object unwrapCustomValue(Object values) {
+        DataType dataType = dataType();
+
+        if (dataType == DATETIME) {
+            if (values instanceof String) {
+                return ZonedDateTime.ofInstant(Instant.ofEpochMilli(Long.parseLong(values.toString())), zoneId());
+            }
+        }
+
+        return null;
+    }
+
+    @Override
+    protected boolean isPrimitive(List<?> list) {
+        return false;
+    }
+}

x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/plan/physical/EsQueryExec.java

@@ -6,6 +6,7 @@
 package org.elasticsearch.xpack.eql.plan.physical;
 
 import org.elasticsearch.action.ActionListener;
+import org.elasticsearch.xpack.eql.execution.search.Querier;
 import org.elasticsearch.xpack.eql.querydsl.container.QueryContainer;
 import org.elasticsearch.xpack.eql.session.EqlSession;
 import org.elasticsearch.xpack.eql.session.Results;
@@ -49,7 +50,7 @@ public class EsQueryExec extends LeafExec {
 
     @Override
     public void execute(EqlSession session, ActionListener<Results> listener) {
-        throw new UnsupportedOperationException();
+        new Querier(session).query(output, queryContainer, index, listener);
     }
 
     @Override

x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/plugin/TransportEqlSearchAction.java

@@ -5,7 +5,6 @@
  */
 package org.elasticsearch.xpack.eql.plugin;
 
-import org.apache.lucene.search.TotalHits;
 import org.elasticsearch.action.ActionListener;
 import org.elasticsearch.action.support.ActionFilters;
 import org.elasticsearch.action.support.HandledTransportAction;
@@ -15,7 +14,6 @@ import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.time.DateUtils;
 import org.elasticsearch.common.unit.TimeValue;
 import org.elasticsearch.index.query.QueryBuilder;
-import org.elasticsearch.search.SearchHit;
 import org.elasticsearch.tasks.Task;
 import org.elasticsearch.threadpool.ThreadPool;
 import org.elasticsearch.transport.TransportService;
@@ -30,8 +28,8 @@ import org.elasticsearch.xpack.eql.session.Configuration;
 import org.elasticsearch.xpack.eql.session.Results;
 
 import java.time.ZoneId;
-import java.util.Arrays;
-import java.util.List;
+
+import static org.elasticsearch.action.ActionListener.wrap;
 
 public class TransportEqlSearchAction extends HandledTransportAction<EqlSearchRequest, EqlSearchResponse> {
     private final SecurityContext securityContext;
@@ -68,23 +66,16 @@ public class TransportEqlSearchAction extends HandledTransportAction<EqlSearchRe
             .fieldTimestamp(request.timestampField())
             .implicitJoinKey(request.implicitJoinKeyField());
 
-        Configuration cfg = new Configuration(request.indices(), zoneId, username, clusterName, filter, timeout, includeFrozen, clientId);
-        //planExecutor.eql(cfg, request.rule(), params, wrap(r -> listener.onResponse(createResponse(r)), listener::onFailure));
-        listener.onResponse(createResponse(null));
+        Configuration cfg = new Configuration(request.indices(), zoneId, username, clusterName, filter, timeout, request.fetchSize(),
+                includeFrozen, clientId);
+        planExecutor.eql(cfg, request.rule(), params, wrap(r -> listener.onResponse(createResponse(r)), listener::onFailure));
     }
 
     static EqlSearchResponse createResponse(Results results) {
-        // Stubbed search response
-        // TODO: implement actual search response processing once the parser/executor is in place
-        // Updated for stubbed response to: process where serial_event_id = 1
-        // to validate the sample test until the engine is wired in.
-        List<SearchHit> events = Arrays.asList(
-            new SearchHit(1, "111", null, null)
-        );
-        EqlSearchResponse.Hits hits = new EqlSearchResponse.Hits(events, null,
-            null, new TotalHits(1, TotalHits.Relation.EQUAL_TO));
+        EqlSearchResponse.Hits hits = new EqlSearchResponse.Hits(results.searchHits(), results.sequences(), results.counts(), results
+                .totalHits());
 
-        return new EqlSearchResponse(hits, 0, false);
+        return new EqlSearchResponse(hits, results.tookTime().getMillis(), results.timedOut());
     }
 
     static String username(SecurityContext securityContext) {

x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/session/Configuration.java

@@ -16,20 +16,22 @@ public class Configuration extends org.elasticsearch.xpack.ql.session.Configurat
     
     private final String[] indices;
     private final TimeValue requestTimeout;
+    private final int size;
     private final String clientId;
     private final boolean includeFrozenIndices;
 
     @Nullable
     private QueryBuilder filter;
 
-    public Configuration(String[] indices, ZoneId zi, String username, String clusterName, QueryBuilder filter,
-            TimeValue requestTimeout, boolean includeFrozen, String clientId) {
+    public Configuration(String[] indices, ZoneId zi, String username, String clusterName, QueryBuilder filter, TimeValue requestTimeout,
+                         int size, boolean includeFrozen, String clientId) {
 
         super(zi, username, clusterName);
 
         this.indices = indices;
         this.filter = filter;
         this.requestTimeout = requestTimeout;
+        this.size = size;
         this.clientId = clientId;
         this.includeFrozenIndices = includeFrozen;
     }
@@ -46,6 +48,10 @@ public class Configuration extends org.elasticsearch.xpack.ql.session.Configurat
         return filter;
     }
 
+    public int size() {
+        return size;
+    }
+
     public String clientId() {
         return clientId;
     }

x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/session/Results.java

@@ -8,6 +8,10 @@ package org.elasticsearch.xpack.eql.session;
 
 import org.apache.lucene.search.TotalHits;
 import org.apache.lucene.search.TotalHits.Relation;
+import org.elasticsearch.common.unit.TimeValue;
+import org.elasticsearch.search.SearchHit;
+import org.elasticsearch.xpack.eql.action.EqlSearchResponse.Count;
+import org.elasticsearch.xpack.eql.action.EqlSearchResponse.Sequence;
 
 import java.util.List;
 
@@ -15,21 +19,65 @@ import static java.util.Collections.emptyList;
 
 public class Results {
 
-    public static final Results EMPTY = new Results(new TotalHits(0, Relation.EQUAL_TO), emptyList());
+    private enum Type {
+        SEARCH_HIT,
+        SEQUENCE,
+        COUNT;
+    }
+    
+    public static final Results EMPTY = new Results(new TotalHits(0, Relation.EQUAL_TO), TimeValue.MINUS_ONE, false, emptyList());
 
     private final TotalHits totalHits;
-    private final List<Object> results;
+    private final List<?> results;
+    private final boolean timedOut;
+    private final TimeValue tookTime;
+    private final Type type;
 
-    public Results(TotalHits totalHits, List<Object> results) {
+    public Results(TotalHits totalHits, TimeValue tookTime, boolean timedOut, List<?> results) {
         this.totalHits = totalHits;
+        this.tookTime = tookTime;
+        this.timedOut = timedOut;
         this.results = results;
+
+        Type t = Type.SEARCH_HIT;
+
+        if (results.isEmpty() == false) {
+            Object o = results.get(0);
+
+            if (o instanceof Sequence) {
+                t = Type.SEQUENCE;
+            }
+            if (o instanceof Count) {
+                t = Type.COUNT;
+            }
+        }
+        type = t;
     }
 
     public TotalHits totalHits() {
         return totalHits;
     }
 
-    public List<Object> results() {
-        return results;
+    @SuppressWarnings("unchecked")
+    public List<SearchHit> searchHits() {
+        return type == Type.SEARCH_HIT ? (List<SearchHit>) results : null;
+    }
+
+    @SuppressWarnings("unchecked")
+    public List<Sequence> sequences() {
+        return type == Type.SEQUENCE ? (List<Sequence>) results : null;
+    }
+
+    @SuppressWarnings("unchecked")
+    public List<Count> counts() {
+        return type == Type.COUNT ? (List<Count>) results : null;
+    }
+
+    public TimeValue tookTime() {
+        return tookTime;
+    }
+
+    public boolean timedOut() {
+        return timedOut;
     }
 }

x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/session/Sequence.java

@@ -1,25 +0,0 @@
-/*
- * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
- * or more contributor license agreements. Licensed under the Elastic License;
- * you may not use this file except in compliance with the Elastic License.
- */
-
-package org.elasticsearch.xpack.eql.session;
-
-import org.elasticsearch.common.collect.Tuple;
-import org.elasticsearch.search.SearchHit;
-
-import java.util.List;
-
-public class Sequence {
-
-    private final List<Tuple<Object, List<SearchHit>>> events;
-
-    public Sequence(List<Tuple<Object, List<SearchHit>>> events) {
-        this.events = events;
-    }
-
-    public List<Tuple<Object, List<SearchHit>>> events() {
-        return events;
-    }
-}

x-pack/plugin/eql/src/test/java/org/elasticsearch/xpack/eql/EqlTestUtils.java

@@ -11,6 +11,7 @@ import org.elasticsearch.xpack.eql.session.Configuration;
 
 import static org.elasticsearch.test.ESTestCase.randomAlphaOfLength;
 import static org.elasticsearch.test.ESTestCase.randomBoolean;
+import static org.elasticsearch.test.ESTestCase.randomIntBetween;
 import static org.elasticsearch.test.ESTestCase.randomNonNegativeLong;
 import static org.elasticsearch.test.ESTestCase.randomZone;
 
@@ -20,7 +21,7 @@ public final class EqlTestUtils {
     }
 
     public static final Configuration TEST_CFG = new Configuration(new String[]{"none"}, org.elasticsearch.xpack.ql.util.DateUtils.UTC,
-        "nobody", "cluster", null, TimeValue.timeValueSeconds(30), false, "");
+            "nobody", "cluster", null, TimeValue.timeValueSeconds(30), -1, false, "");
 
     public static Configuration randomConfiguration() {
         return new Configuration(new String[]{randomAlphaOfLength(16)},
@@ -29,6 +30,7 @@ public final class EqlTestUtils {
             randomAlphaOfLength(16),
             null,
             new TimeValue(randomNonNegativeLong()),
+            randomIntBetween(5, 100),
             randomBoolean(),
             randomAlphaOfLength(16));
     }

x-pack/plugin/eql/src/test/java/org/elasticsearch/xpack/eql/action/EqlActionIT.java

@@ -9,6 +9,7 @@ package org.elasticsearch.xpack.eql.action;
 import com.carrotsearch.randomizedtesting.annotations.ParametersFactory;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
+
 import org.elasticsearch.Build;
 import org.elasticsearch.action.bulk.BulkRequestBuilder;
 import org.elasticsearch.action.bulk.BulkResponse;
@@ -105,7 +106,7 @@ public class EqlActionIT extends AbstractEqlIntegTestCase {
         final int len = events.size();
         final long ids[] = new long[len];
         for (int i = 0; i < events.size(); i++) {
-            ids[i] = events.get(i).docId();
+            ids[i] = ((Number) events.get(i).getSourceAsMap().get("serial_event_id")).longValue();
         }
         final String msg = "unexpected result for spec: [" + spec.toString() + "]";
         assertArrayEquals(msg, spec.expectedEventIds(), ids);