[ML] Datafeed deprecation checks (#38026)

Deprecation checks for the ML datafeed
query and aggregations.

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/deprecation/DeprecationInfoAction.java

@@ -5,6 +5,7 @@
  */
 package org.elasticsearch.xpack.core.deprecation;
 
+import org.elasticsearch.Version;
 import org.elasticsearch.action.Action;
 import org.elasticsearch.action.ActionRequestValidationException;
 import org.elasticsearch.action.ActionResponse;
@@ -23,9 +24,12 @@ import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
 import org.elasticsearch.common.xcontent.ToXContentObject;
 import org.elasticsearch.common.xcontent.XContentBuilder;
+import org.elasticsearch.xpack.core.ml.datafeed.DatafeedConfig;
 
 import java.io.IOException;
+import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -67,16 +71,19 @@ public class DeprecationInfoAction extends Action<DeprecationInfoAction.Response
         private List<DeprecationIssue> clusterSettingsIssues;
         private List<DeprecationIssue> nodeSettingsIssues;
         private Map<String, List<DeprecationIssue>> indexSettingsIssues;
+        private List<DeprecationIssue> mlSettingsIssues;
 
         public Response() {
         }
 
         public Response(List<DeprecationIssue> clusterSettingsIssues,
                         List<DeprecationIssue> nodeSettingsIssues,
-                        Map<String, List<DeprecationIssue>> indexSettingsIssues) {
+                        Map<String, List<DeprecationIssue>> indexSettingsIssues,
+                        List<DeprecationIssue> mlSettingsIssues) {
             this.clusterSettingsIssues = clusterSettingsIssues;
             this.nodeSettingsIssues = nodeSettingsIssues;
             this.indexSettingsIssues = indexSettingsIssues;
+            this.mlSettingsIssues = mlSettingsIssues;
         }
 
         public List<DeprecationIssue> getClusterSettingsIssues() {
@@ -91,12 +98,21 @@ public class DeprecationInfoAction extends Action<DeprecationInfoAction.Response
             return indexSettingsIssues;
         }
 
+        public List<DeprecationIssue> getMlSettingsIssues() {
+            return mlSettingsIssues;
+        }
+
         @Override
         public void readFrom(StreamInput in) throws IOException {
             super.readFrom(in);
             clusterSettingsIssues = in.readList(DeprecationIssue::new);
             nodeSettingsIssues = in.readList(DeprecationIssue::new);
             indexSettingsIssues = in.readMapOfLists(StreamInput::readString, DeprecationIssue::new);
+            if (in.getVersion().onOrAfter(Version.V_6_7_0)) {
+                mlSettingsIssues = in.readList(DeprecationIssue::new);
+            } else {
+                mlSettingsIssues = Collections.emptyList();
+            }
         }
 
         @Override
@@ -105,6 +121,9 @@ public class DeprecationInfoAction extends Action<DeprecationInfoAction.Response
             out.writeList(clusterSettingsIssues);
             out.writeList(nodeSettingsIssues);
             out.writeMapOfLists(indexSettingsIssues, StreamOutput::writeString, (o, v) -> v.writeTo(o));
+            if (out.getVersion().onOrAfter(Version.V_6_7_0)) {
+                out.writeList(mlSettingsIssues);
+            }
         }
 
         @Override
@@ -114,10 +133,10 @@ public class DeprecationInfoAction extends Action<DeprecationInfoAction.Response
                 .array("node_settings", nodeSettingsIssues.toArray())
                 .field("index_settings")
                 .map(indexSettingsIssues)
+                .array("ml_settings", mlSettingsIssues.toArray())
                 .endObject();
         }
 
-
         @Override
         public boolean equals(Object o) {
             if (this == o) return true;
@@ -125,12 +144,13 @@ public class DeprecationInfoAction extends Action<DeprecationInfoAction.Response
             Response response = (Response) o;
             return Objects.equals(clusterSettingsIssues, response.clusterSettingsIssues) &&
                 Objects.equals(nodeSettingsIssues, response.nodeSettingsIssues) &&
-                Objects.equals(indexSettingsIssues, response.indexSettingsIssues);
+                Objects.equals(indexSettingsIssues, response.indexSettingsIssues) &&
+                Objects.equals(mlSettingsIssues, response.mlSettingsIssues);
         }
 
         @Override
         public int hashCode() {
-            return Objects.hash(clusterSettingsIssues, nodeSettingsIssues, indexSettingsIssues);
+            return Objects.hash(clusterSettingsIssues, nodeSettingsIssues, indexSettingsIssues, mlSettingsIssues);
         }
 
         /**
@@ -145,22 +165,30 @@ public class DeprecationInfoAction extends Action<DeprecationInfoAction.Response
          * @param indexNameExpressionResolver Used to resolve indices into their concrete names
          * @param indices The list of index expressions to evaluate using `indexNameExpressionResolver`
          * @param indicesOptions The options to use when resolving and filtering which indices to check
+         * @param datafeeds The ml datafeed configurations
          * @param clusterSettingsChecks The list of cluster-level checks
          * @param nodeSettingsChecks The list of node-level checks
          * @param indexSettingsChecks The list of index-level checks that will be run across all specified
          *                            concrete indices
+         * @param mlSettingsCheck The list of ml checks
          * @return The list of deprecation issues found in the cluster
          */
         public static DeprecationInfoAction.Response from(List<NodeInfo> nodesInfo, List<NodeStats> nodesStats, ClusterState state,
-                                                   IndexNameExpressionResolver indexNameExpressionResolver,
+                                                  IndexNameExpressionResolver indexNameExpressionResolver,
-                                                   String[] indices, IndicesOptions indicesOptions,
+                                                  String[] indices, IndicesOptions indicesOptions,
-                                                   List<Function<ClusterState,DeprecationIssue>>clusterSettingsChecks,
+                                                  List<DatafeedConfig> datafeeds,
-                                                   List<BiFunction<List<NodeInfo>, List<NodeStats>, DeprecationIssue>> nodeSettingsChecks,
+                                                  List<Function<ClusterState,DeprecationIssue>>clusterSettingsChecks,
-                                                   List<Function<IndexMetaData, DeprecationIssue>> indexSettingsChecks) {
+                                                  List<BiFunction<List<NodeInfo>, List<NodeStats>, DeprecationIssue>> nodeSettingsChecks,
+                                                  List<Function<IndexMetaData, DeprecationIssue>> indexSettingsChecks,
+                                                  List<Function<DatafeedConfig, DeprecationIssue>> mlSettingsCheck) {
             List<DeprecationIssue> clusterSettingsIssues = filterChecks(clusterSettingsChecks,
                 (c) -> c.apply(state));
             List<DeprecationIssue> nodeSettingsIssues = filterChecks(nodeSettingsChecks,
                 (c) -> c.apply(nodesInfo, nodesStats));
+            List<DeprecationIssue> mlSettingsIssues = new ArrayList<>();
+            for (DatafeedConfig config : datafeeds) {
+                mlSettingsIssues.addAll(filterChecks(mlSettingsCheck, (c) -> c.apply(config)));
+            }
 
             String[] concreteIndexNames = indexNameExpressionResolver.concreteIndexNames(state, indicesOptions, indices);
 
@@ -174,7 +202,7 @@ public class DeprecationInfoAction extends Action<DeprecationInfoAction.Response
                 }
             }
 
-            return new DeprecationInfoAction.Response(clusterSettingsIssues, nodeSettingsIssues, indexSettingsIssues);
+            return new DeprecationInfoAction.Response(clusterSettingsIssues, nodeSettingsIssues, indexSettingsIssues, mlSettingsIssues);
         }
     }
 

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/ml/datafeed/DatafeedConfig.java

@@ -665,7 +665,7 @@ public class DatafeedConfig extends AbstractDiffable<DatafeedConfig> implements
             }
         }
 
-        void setQuery(Map<String, Object> query) {
+        public void setQuery(Map<String, Object> query) {
             this.query = ExceptionsHelper.requireNonNull(query, QUERY.getPreferredName());
         }
 

x-pack/plugin/core/src/test/java/org/elasticsearch/xpack/core/deprecation/DeprecationInfoActionResponseTests.java

@@ -22,6 +22,8 @@ import org.elasticsearch.common.transport.TransportAddress;
 import org.elasticsearch.common.xcontent.XContentBuilder;
 import org.elasticsearch.common.xcontent.XContentFactory;
 import org.elasticsearch.test.AbstractStreamableTestCase;
+import org.elasticsearch.xpack.core.ml.datafeed.DatafeedConfig;
+import org.elasticsearch.xpack.core.ml.datafeed.DatafeedConfigTests;
 
 import java.io.IOException;
 import java.util.Arrays;
@@ -45,13 +47,15 @@ public class DeprecationInfoActionResponseTests extends AbstractStreamableTestCa
             .limit(randomIntBetween(0, 10)).collect(Collectors.toList());
         List<DeprecationIssue> nodeIssues = Stream.generate(DeprecationIssueTests::createTestInstance)
             .limit(randomIntBetween(0, 10)).collect(Collectors.toList());
+        List<DeprecationIssue> mlIssues = Stream.generate(DeprecationIssueTests::createTestInstance)
+                .limit(randomIntBetween(0, 10)).collect(Collectors.toList());
         Map<String, List<DeprecationIssue>> indexIssues = new HashMap<>();
         for (int i = 0; i < randomIntBetween(0, 10); i++) {
             List<DeprecationIssue> perIndexIssues = Stream.generate(DeprecationIssueTests::createTestInstance)
                 .limit(randomIntBetween(0, 10)).collect(Collectors.toList());
             indexIssues.put(randomAlphaOfLength(10), perIndexIssues);
         }
-        return new DeprecationInfoAction.Response(clusterIssues, nodeIssues, indexIssues);
+        return new DeprecationInfoAction.Response(clusterIssues, nodeIssues, indexIssues, mlIssues);
     }
 
     @Override
@@ -80,12 +84,14 @@ public class DeprecationInfoActionResponseTests extends AbstractStreamableTestCa
         List<NodeStats> nodeStats = Collections.singletonList(new NodeStats(discoveryNode, 0L, null,
             null, null, null, null, null, null, null, null,
             null, null, null, null));
+        List<DatafeedConfig> datafeeds = Collections.singletonList(DatafeedConfigTests.createRandomizedDatafeedConfig("foo"));
         IndexNameExpressionResolver resolver = new IndexNameExpressionResolver();
         IndicesOptions indicesOptions = IndicesOptions.fromOptions(false, false,
             true, true);
         boolean clusterIssueFound = randomBoolean();
         boolean nodeIssueFound = randomBoolean();
         boolean indexIssueFound = randomBoolean();
+        boolean mlIssueFound = randomBoolean();
         DeprecationIssue foundIssue = DeprecationIssueTests.createTestInstance();
         List<Function<ClusterState, DeprecationIssue>> clusterSettingsChecks =
             Collections.unmodifiableList(Arrays.asList(
@@ -100,10 +106,14 @@ public class DeprecationInfoActionResponseTests extends AbstractStreamableTestCa
             Collections.unmodifiableList(Arrays.asList(
                 (idx) -> indexIssueFound ? foundIssue : null
             ));
+        List<Function<DatafeedConfig, DeprecationIssue>> mlSettingsChecks =
+                Collections.unmodifiableList(Arrays.asList(
+                        (idx) -> mlIssueFound ? foundIssue : null
+                ));
 
         DeprecationInfoAction.Response response = DeprecationInfoAction.Response.from(nodeInfos, nodeStats, state,
-            resolver, Strings.EMPTY_ARRAY, indicesOptions,
+            resolver, Strings.EMPTY_ARRAY, indicesOptions, datafeeds,
-            clusterSettingsChecks, nodeSettingsChecks, indexSettingsChecks);
+            clusterSettingsChecks, nodeSettingsChecks, indexSettingsChecks, mlSettingsChecks);
 
         if (clusterIssueFound) {
             assertThat(response.getClusterSettingsIssues(), equalTo(Collections.singletonList(foundIssue)));
@@ -123,5 +133,11 @@ public class DeprecationInfoActionResponseTests extends AbstractStreamableTestCa
         } else {
             assertTrue(response.getIndexSettingsIssues().isEmpty());
         }
+
+        if (mlIssueFound) {
+            assertThat(response.getMlSettingsIssues(), equalTo(Collections.singletonList(foundIssue)));
+        } else {
+            assertTrue(response.getMlSettingsIssues().isEmpty());
+        }
     }
 }

x-pack/plugin/deprecation/src/main/java/org/elasticsearch/xpack/deprecation/DeprecationChecks.java

@@ -11,6 +11,7 @@ import org.elasticsearch.cluster.ClusterState;
 import org.elasticsearch.cluster.metadata.IndexMetaData;
 import org.elasticsearch.xpack.core.deprecation.DeprecationInfoAction;
 import org.elasticsearch.xpack.core.deprecation.DeprecationIssue;
+import org.elasticsearch.xpack.core.ml.datafeed.DatafeedConfig;
 
 import java.util.Arrays;
 import java.util.Collections;
@@ -41,6 +42,12 @@ public class DeprecationChecks {
         Collections.unmodifiableList(Arrays.asList(
             IndexDeprecationChecks::oldIndicesCheck));
 
+    static List<Function<DatafeedConfig, DeprecationIssue>> ML_SETTINGS_CHECKS =
+            Collections.unmodifiableList(Arrays.asList(
+                    MlDeprecationChecks::checkDataFeedAggregations,
+                    MlDeprecationChecks::checkDataFeedQuery
+            ));
+
     /**
      * helper utility function to reduce repeat of running a specific {@link List} of checks.
      *

x-pack/plugin/deprecation/src/main/java/org/elasticsearch/xpack/deprecation/MlDeprecationChecks.java

@@ -0,0 +1,44 @@
+/*
+ * 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.deprecation;
+
+import org.elasticsearch.xpack.core.deprecation.DeprecationIssue;
+import org.elasticsearch.xpack.core.ml.datafeed.DatafeedConfig;
+
+import java.util.List;
+
+/**
+ * Check the {@link DatafeedConfig} query and aggregations for deprecated usages.
+ */
+final class MlDeprecationChecks {
+
+    private MlDeprecationChecks() {
+    }
+
+    static DeprecationIssue checkDataFeedQuery(DatafeedConfig datafeedConfig) {
+        List<String> deprecations = datafeedConfig.getQueryDeprecations();
+        if (deprecations.isEmpty()) {
+            return null;
+        } else {
+            return new DeprecationIssue(DeprecationIssue.Level.WARNING,
+                    "Datafeed [" + datafeedConfig.getId() + "] uses deprecated query options",
+                    "https://www.elastic.co/guide/en/elasticsearch/reference/master/breaking-changes-7.0.html#breaking_70_search_changes",
+                    deprecations.toString());
+        }
+    }
+
+    static DeprecationIssue checkDataFeedAggregations(DatafeedConfig datafeedConfig) {
+        List<String> deprecations = datafeedConfig.getAggDeprecations();
+        if (deprecations.isEmpty()) {
+            return null;
+        } else {
+            return new DeprecationIssue(DeprecationIssue.Level.WARNING,
+                    "Datafeed [" + datafeedConfig.getId() + "] uses deprecated aggregation options",
+                    "https://www.elastic.co/guide/en/elasticsearch/reference/master/breaking-changes-7.0.html" +
+                            "#breaking_70_aggregations_changes", deprecations.toString());
+        }
+    }
+}

x-pack/plugin/deprecation/src/main/java/org/elasticsearch/xpack/deprecation/TransportDeprecationInfoAction.java

@@ -19,6 +19,7 @@ import org.elasticsearch.cluster.block.ClusterBlockLevel;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.inject.Inject;
+import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.util.concurrent.ThreadContext;
 import org.elasticsearch.license.LicenseUtils;
 import org.elasticsearch.license.XPackLicenseState;
@@ -26,7 +27,13 @@ import org.elasticsearch.threadpool.ThreadPool;
 import org.elasticsearch.transport.TransportService;
 import org.elasticsearch.xpack.core.ClientHelper;
 import org.elasticsearch.xpack.core.XPackField;
+import org.elasticsearch.xpack.core.XPackSettings;
 import org.elasticsearch.xpack.core.deprecation.DeprecationInfoAction;
+import org.elasticsearch.xpack.core.ml.action.GetDatafeedsAction;
+import org.elasticsearch.xpack.core.ml.datafeed.DatafeedConfig;
+
+import java.util.Collections;
+import java.util.List;
 
 public class TransportDeprecationInfoAction extends TransportMasterNodeReadAction<DeprecationInfoAction.Request,
         DeprecationInfoAction.Response> {
@@ -34,9 +41,10 @@ public class TransportDeprecationInfoAction extends TransportMasterNodeReadActio
     private final XPackLicenseState licenseState;
     private final NodeClient client;
     private final IndexNameExpressionResolver indexNameExpressionResolver;
+    private final Settings settings;
 
     @Inject
-    public TransportDeprecationInfoAction(TransportService transportService, ClusterService clusterService,
+    public TransportDeprecationInfoAction(Settings settings, TransportService transportService, ClusterService clusterService,
                                           ThreadPool threadPool, ActionFilters actionFilters,
                                           IndexNameExpressionResolver indexNameExpressionResolver,
                                           XPackLicenseState licenseState, NodeClient client) {
@@ -45,6 +53,7 @@ public class TransportDeprecationInfoAction extends TransportMasterNodeReadActio
         this.licenseState = licenseState;
         this.client = client;
         this.indexNameExpressionResolver = indexNameExpressionResolver;
+        this.settings = settings;
     }
 
     @Override
@@ -83,11 +92,20 @@ public class TransportDeprecationInfoAction extends TransportMasterNodeReadActio
                                         if (nodesStatsResponse.hasFailures()) {
                                             throw nodesStatsResponse.failures().get(0);
                                         }
-                                        listener.onResponse(DeprecationInfoAction.Response.from(nodesInfoResponse.getNodes(),
+
-                                                nodesStatsResponse.getNodes(), state, indexNameExpressionResolver,
+                                        getDatafeedConfigs(ActionListener.wrap(
-                                                request.indices(), request.indicesOptions(),
+                                            datafeeds -> {
-                                                DeprecationChecks.CLUSTER_SETTINGS_CHECKS, DeprecationChecks.NODE_SETTINGS_CHECKS,
+                                                listener.onResponse(
-                                                DeprecationChecks.INDEX_SETTINGS_CHECKS));
+                                                        DeprecationInfoAction.Response.from(nodesInfoResponse.getNodes(),
+                                                        nodesStatsResponse.getNodes(), state, indexNameExpressionResolver,
+                                                        request.indices(), request.indicesOptions(), datafeeds,
+                                                        DeprecationChecks.CLUSTER_SETTINGS_CHECKS,
+                                                        DeprecationChecks.NODE_SETTINGS_CHECKS,
+                                                        DeprecationChecks.INDEX_SETTINGS_CHECKS,
+                                                        DeprecationChecks.ML_SETTINGS_CHECKS));
+                                             },
+                                             listener::onFailure
+                                        ));
                                     }, listener::onFailure),
                                 client.admin().cluster()::nodesStats);
                     }, listener::onFailure), client.admin().cluster()::nodesInfo);
@@ -95,4 +113,16 @@ public class TransportDeprecationInfoAction extends TransportMasterNodeReadActio
             listener.onFailure(LicenseUtils.newComplianceException(XPackField.DEPRECATION));
         }
     }
+
+    private void getDatafeedConfigs(ActionListener<List<DatafeedConfig>> listener) {
+        if (XPackSettings.MACHINE_LEARNING_ENABLED.get(settings) == false) {
+            listener.onResponse(Collections.emptyList());
+        } else {
+            ClientHelper.executeAsyncWithOrigin(client, ClientHelper.DEPRECATION_ORIGIN, GetDatafeedsAction.INSTANCE,
+                    new GetDatafeedsAction.Request(GetDatafeedsAction.ALL), ActionListener.wrap(
+                            datafeedsResponse -> listener.onResponse(datafeedsResponse.getResponse().results()),
+                            listener::onFailure
+                    ));
+        }
+    }
 }

x-pack/plugin/deprecation/src/test/java/org/elasticsearch/xpack/deprecation/MlDeprecationChecksTests.java

@@ -0,0 +1,48 @@
+/*
+ * 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.deprecation;
+
+import org.elasticsearch.index.query.TermQueryBuilder;
+import org.elasticsearch.test.ESTestCase;
+import org.elasticsearch.xpack.core.ml.datafeed.DatafeedConfig;
+
+import java.util.Collections;
+
+public class MlDeprecationChecksTests extends ESTestCase {
+
+    @Override
+    protected boolean enableWarningsCheck() {
+        return false;
+    }
+
+    public void testCheckDataFeedQuery() {
+        DatafeedConfig.Builder goodDatafeed = new DatafeedConfig.Builder("good-df", "job-id");
+        goodDatafeed.setIndices(Collections.singletonList("some-index"));
+        goodDatafeed.setParsedQuery(new TermQueryBuilder("foo", "bar"));
+        assertNull(MlDeprecationChecks.checkDataFeedQuery(goodDatafeed.build()));
+
+        DatafeedConfig.Builder deprecatedDatafeed = new DatafeedConfig.Builder("df-with-deprecated-query", "job-id");
+        deprecatedDatafeed.setIndices(Collections.singletonList("some-index"));
+        // TODO: once some query syntax has been removed from 8.0 and deprecated in 7.x reinstate this test
+        // to check that particular query syntax causes a deprecation warning
+        /*
+        Map<String, Object> qs = new HashMap<>();
+        qs.put("query", "foo");
+        qs.put("use_dis_max", true);
+        Map<String, Object> query = Collections.singletonMap("query_string", qs);
+        deprecatedDatafeed.setQuery(query);
+        
+        DeprecationIssue issue = MlDeprecationChecks.checkDataFeedQuery(deprecatedDatafeed.build());
+        assertNotNull(issue);
+        assertThat(issue.getDetails(), equalTo("[Deprecated field [use_dis_max] used, replaced by [Set [tie_breaker] to 1 instead]]"));
+        assertThat(issue.getLevel(), equalTo(DeprecationIssue.Level.WARNING));
+        assertThat(issue.getMessage(), equalTo("Datafeed [df-with-deprecated-query] uses deprecated query options"));
+        assertThat(issue.getUrl(), equalTo("https://www.elastic.co/guide/en/elasticsearch/reference/master/breaking-changes-8.0.html" +
+                "#breaking_80_search_changes"));
+        */
+    }
+}

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

@@ -12,4 +12,50 @@ setup:
   - length: { cluster_settings: 0 }
   - length: { node_settings: 0 }
   - length: { index_settings: 0 }
+  - length: { ml_settings: 0 }
 
+---
+"Test ml":
+  - skip:
+      version: "7.0.0 - "
+      features: ["headers", "warnings"]
+      reason: this test needs adjusting to contain syntax deprecated in 7.x and removed in 8.0
+
+# Index the config directly to prevent the deprecated
+# use_dis_max field being rewritten by the parser. This
+# simulates the config being created in an older version
+# of elasticsearch
+  - do:
+      headers:
+        Content-Type: application/json
+      index:
+        index: .ml-config
+        type: doc
+        id: deprecation-datafeed-datafeed
+        body:  >
+          {
+            "datafeed_id" : "deprecation-datafeed",
+            "config_type" : "datafeed",
+            "job_id" : "deprecation-job",
+            "indices" : ["index-foo"],
+            "query" : {
+              "query_string" : {
+                "query" : "foo",
+                "use_dis_max" : true
+              }
+            }
+          }
+
+  - do:
+      indices.refresh:
+        index: [.ml-config]
+
+# TODO: change the query and expected warnings to one that makes sense for 7.x
+  - do:
+      warnings:
+        - Deprecated field [use_dis_max] used, replaced by [Set [tie_breaker] to 1 instead]
+      xpack.migration.deprecations:
+        index: "*"
+  - length: { ml_settings: 1 }
+  - match: { ml_settings.0.level : warning }
+  - match: { ml_settings.0.message : "Datafeed [deprecation-datafeed] uses deprecated query options" }