[7.16] [ML] Parent datafeed actions to the datafeed's persistent task (…

…#81143) (#81153)

* [ML] Parent datafeed actions to the datafeed's persistent task (#81143)

The vast majority of a datafeed's actions are executed from the
data extractor. This includes the heaviest actions which are the
searches. This commit passes a `ParentTaskAssigningClient` to
`DataExtractorFactory.create` which ensures the client used by
any extractor will be setting the corresponding task id: the action
task id for preview datafeed and the master operation stage of the
start datafeed action, and the persistent task id for the datafeed
operations after it has started.

* Can't parent on the start datafeed master op as we don't have task

x-pack/plugin/ml/src/main/java/org/elasticsearch/xpack/ml/action/TransportPreviewDatafeedAction.java

@@ -13,6 +13,8 @@
 import org.elasticsearch.action.support.ActionFilters;
 import org.elasticsearch.action.support.HandledTransportAction;
 import org.elasticsearch.client.Client;
+import org.elasticsearch.client.ParentTaskAssigningClient;
+import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.bytes.BytesArray;
 import org.elasticsearch.common.inject.Inject;
 import org.elasticsearch.common.settings.Settings;
@@ -53,6 +55,7 @@ public class TransportPreviewDatafeedAction extends HandledTransportAction<Previ
 
     private final ThreadPool threadPool;
     private final Client client;
+    private final ClusterService clusterService;
     private final JobConfigProvider jobConfigProvider;
     private final DatafeedConfigProvider datafeedConfigProvider;
     private final NamedXContentRegistry xContentRegistry;
@@ -65,13 +68,15 @@ public TransportPreviewDatafeedAction(
         TransportService transportService,
         ActionFilters actionFilters,
         Client client,
+        ClusterService clusterService,
         JobConfigProvider jobConfigProvider,
         DatafeedConfigProvider datafeedConfigProvider,
         NamedXContentRegistry xContentRegistry
     ) {
         super(PreviewDatafeedAction.NAME, transportService, actionFilters, PreviewDatafeedAction.Request::new);
         this.threadPool = threadPool;
         this.client = client;
+        this.clusterService = clusterService;
         this.jobConfigProvider = jobConfigProvider;
         this.datafeedConfigProvider = datafeedConfigProvider;
         this.xContentRegistry = xContentRegistry;
@@ -84,12 +89,12 @@ public TransportPreviewDatafeedAction(
     protected void doExecute(Task task, PreviewDatafeedAction.Request request, ActionListener<PreviewDatafeedAction.Response> listener) {
         ActionListener<DatafeedConfig> datafeedConfigActionListener = ActionListener.wrap(datafeedConfig -> {
             if (request.getJobConfig() != null) {
-                previewDatafeed(datafeedConfig, request.getJobConfig().build(new Date()), listener);
+                previewDatafeed(task, datafeedConfig, request.getJobConfig().build(new Date()), listener);
                 return;
             }
             jobConfigProvider.getJob(
                 datafeedConfig.getJobId(),
-                ActionListener.wrap(jobBuilder -> previewDatafeed(datafeedConfig, jobBuilder.build(), listener), listener::onFailure)
+                ActionListener.wrap(jobBuilder -> previewDatafeed(task, datafeedConfig, jobBuilder.build(), listener), listener::onFailure)
             );
         }, listener::onFailure);
         if (request.getDatafeedConfig() != null) {
@@ -102,7 +107,12 @@ protected void doExecute(Task task, PreviewDatafeedAction.Request request, Actio
         }
     }
 
-    private void previewDatafeed(DatafeedConfig datafeedConfig, Job job, ActionListener<PreviewDatafeedAction.Response> listener) {
+    private void previewDatafeed(
+        Task task,
+        DatafeedConfig datafeedConfig,
+        Job job,
+        ActionListener<PreviewDatafeedAction.Response> listener
+    ) {
         DatafeedConfig.Builder previewDatafeedBuilder = buildPreviewDatafeed(datafeedConfig);
         useSecondaryAuthIfAvailable(securityContext, () -> {
             previewDatafeedBuilder.setHeaders(filterSecurityHeaders(threadPool.getThreadContext().getHeaders()));
@@ -111,7 +121,7 @@ private void previewDatafeed(DatafeedConfig datafeedConfig, Job job, ActionListe
             // requesting the preview doesn't have permission to search the relevant indices.
             DatafeedConfig previewDatafeedConfig = previewDatafeedBuilder.build();
             DataExtractorFactory.create(
-                client,
+                new ParentTaskAssigningClient(client, clusterService.localNode(), task),
                 previewDatafeedConfig,
                 job,
                 xContentRegistry,

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

@@ -44,7 +44,7 @@ public class DatafeedJobBuilder {
     private final Supplier<Long> currentTimeSupplier;
     private final JobResultsPersister jobResultsPersister;
     private final boolean remoteClusterClient;
-    private final String nodeName;
+    private final ClusterService clusterService;
 
     private volatile long delayedDataCheckFreq;
 
@@ -65,8 +65,8 @@ public DatafeedJobBuilder(
         this.currentTimeSupplier = Objects.requireNonNull(currentTimeSupplier);
         this.jobResultsPersister = Objects.requireNonNull(jobResultsPersister);
         this.remoteClusterClient = DiscoveryNode.isRemoteClusterClient(settings);
-        this.nodeName = clusterService.getNodeName();
         this.delayedDataCheckFreq = DELAYED_DATA_CHECK_FREQ.get(settings).millis();
+        this.clusterService = Objects.requireNonNull(clusterService);
         clusterService.getClusterSettings().addSettingsUpdateConsumer(DELAYED_DATA_CHECK_FREQ, this::setDelayedDataCheckFreq);
     }
 
@@ -75,7 +75,7 @@ private void setDelayedDataCheckFreq(TimeValue value) {
     }
 
     void build(TransportStartDatafeedAction.DatafeedTask task, DatafeedContext context, ActionListener<DatafeedJob> listener) {
-        final ParentTaskAssigningClient parentTaskAssigningClient = new ParentTaskAssigningClient(client, task.getParentTaskId());
+        final ParentTaskAssigningClient parentTaskAssigningClient = new ParentTaskAssigningClient(client, clusterService.localNode(), task);
         final DatafeedConfig datafeedConfig = context.getDatafeedConfig();
         final Job job = context.getJob();
         final long latestFinalBucketEndMs = context.getRestartTimeInfo().getLatestFinalBucketTimeMs() == null
@@ -155,7 +155,12 @@ private void checkRemoteIndicesAreAvailable(DatafeedConfig datafeedConfig) {
             List<String> remoteIndices = RemoteClusterLicenseChecker.remoteIndices(datafeedConfig.getIndices());
             if (remoteIndices.isEmpty() == false) {
                 throw ExceptionsHelper.badRequestException(
-                    Messages.getMessage(Messages.DATAFEED_NEEDS_REMOTE_CLUSTER_SEARCH, datafeedConfig.getId(), remoteIndices, nodeName)
+                    Messages.getMessage(
+                        Messages.DATAFEED_NEEDS_REMOTE_CLUSTER_SEARCH,
+                        datafeedConfig.getId(),
+                        remoteIndices,
+                        clusterService.getNodeName()
+                    )
                 );
             }
         }

x-pack/plugin/ml/src/test/java/org/elasticsearch/xpack/ml/datafeed/DatafeedJobBuilderTests.java

@@ -6,8 +6,14 @@
  */
 package org.elasticsearch.xpack.ml.datafeed;
 
+import org.elasticsearch.Version;
 import org.elasticsearch.action.ActionListener;
 import org.elasticsearch.client.Client;
+import org.elasticsearch.cluster.ClusterName;
+import org.elasticsearch.cluster.ClusterState;
+import org.elasticsearch.cluster.block.ClusterBlocks;
+import org.elasticsearch.cluster.node.DiscoveryNode;
+import org.elasticsearch.cluster.node.DiscoveryNodes;
 import org.elasticsearch.cluster.routing.OperationRouting;
 import org.elasticsearch.cluster.routing.allocation.decider.AwarenessAllocationDecider;
 import org.elasticsearch.cluster.service.ClusterApplierService;
@@ -39,6 +45,8 @@
 import java.util.HashSet;
 import java.util.concurrent.atomic.AtomicBoolean;
 
+import static java.util.Collections.emptyMap;
+import static java.util.Collections.emptySet;
 import static org.elasticsearch.test.NodeRoles.nonRemoteClusterClientNode;
 import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.Matchers.is;
@@ -80,11 +88,25 @@ public void init() {
                 )
             )
         );
+        final DiscoveryNode localNode = new DiscoveryNode(
+            "test_node",
+            buildNewFakeTransportAddress(),
+            emptyMap(),
+            emptySet(),
+            Version.CURRENT
+        );
         clusterService = new ClusterService(
             Settings.builder().put(Node.NODE_NAME_SETTING.getKey(), "test_node").build(),
             clusterSettings,
             threadPool
         );
+        clusterService.getClusterApplierService()
+            .setInitialState(
+                ClusterState.builder(new ClusterName("DatafeedJobBuilderTests"))
+                    .nodes(DiscoveryNodes.builder().add(localNode).localNodeId(localNode.getId()).masterNodeId(localNode.getId()))
+                    .blocks(ClusterBlocks.EMPTY_CLUSTER_BLOCK)
+                    .build()
+            );
 
         datafeedJobBuilder = new DatafeedJobBuilder(
             client,