[8.x] Add ESQL telemetry collection (#119474)

docs/changelog/119474.yaml

@@ -0,0 +1,5 @@
+pr: 119474
+summary: "Add ES|QL cross-cluster query telemetry collection"
+area: ES|QL
+type: enhancement
+issues: []

docs/reference/cluster/stats.asciidoc

@@ -25,7 +25,6 @@ Returns cluster statistics.
 
 * If the {es} {security-features} are enabled, you must have the `monitor` or
 `manage` <<privileges-list-cluster,cluster privilege>> to use this API.
-
 [[cluster-stats-api-desc]]
 ==== {api-description-title}
 
@@ -1397,7 +1396,7 @@ as a human-readable string.
 
 
 `_search`:::
-(object) Contains the information about the <<modules-cross-cluster-search, {ccs}>> usage in the cluster.
+(object) Contains information about <<modules-cross-cluster-search, {ccs}>> usage.
 +
 .Properties of `_search`
 [%collapsible%open]
@@ -1528,7 +1527,11 @@ This may include requests where partial results were returned, but not requests
 
 =======
 
+
 ======
+`_esql`:::
+(object) Contains information about <<esql-cross-clusters,{esql} {ccs}>> usage.
+The structure of the object is the same as the `_search` object above.
 
 =====
 

server/src/internalClusterTest/java/org/elasticsearch/search/ccs/CCSUsageTelemetryIT.java

@@ -37,27 +37,19 @@
 import org.elasticsearch.tasks.Task;
 import org.elasticsearch.test.AbstractMultiClustersTestCase;
 import org.elasticsearch.test.InternalTestCluster;
+import org.elasticsearch.test.SkipUnavailableRule;
+import org.elasticsearch.test.SkipUnavailableRule.NotSkipped;
 import org.elasticsearch.usage.UsageService;
 import org.junit.Assert;
 import org.junit.Rule;
-import org.junit.rules.TestRule;
-import org.junit.runner.Description;
-import org.junit.runners.model.Statement;
-
-import java.lang.annotation.ElementType;
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
-import java.lang.annotation.Target;
-import java.util.Arrays;
+
 import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.TimeUnit;
-import java.util.function.Function;
-import java.util.stream.Collectors;
 
 import static org.elasticsearch.action.admin.cluster.stats.CCSUsageTelemetry.ASYNC_FEATURE;
 import static org.elasticsearch.action.admin.cluster.stats.CCSUsageTelemetry.MRT_FEATURE;
@@ -498,7 +490,7 @@ public void testRemoteOnlyTimesOut() throws Exception {
         assertThat(perCluster.get(REMOTE2), equalTo(null));
     }
 
-    @SkipOverride(aliases = { REMOTE1 })
+    @NotSkipped(aliases = { REMOTE1 })
     public void testRemoteTimesOutFailure() throws Exception {
         Map<String, Object> testClusterInfo = setupClusters();
         String remoteIndex = (String) testClusterInfo.get("remote.index");
@@ -528,7 +520,7 @@ public void testRemoteTimesOutFailure() throws Exception {
     /**
     * Search when all the remotes failed and not skipped
     */
-    @SkipOverride(aliases = { REMOTE1, REMOTE2 })
+    @NotSkipped(aliases = { REMOTE1, REMOTE2 })
     public void testFailedAllRemotesSearch() throws Exception {
         Map<String, Object> testClusterInfo = setupClusters();
         String localIndex = (String) testClusterInfo.get("local.index");
@@ -577,7 +569,7 @@ public void testRemoteHasNoIndex() throws Exception {
     /**
      * Test that we're still counting remote search even if remote cluster has no such index
      */
-    @SkipOverride(aliases = { REMOTE1 })
+    @NotSkipped(aliases = { REMOTE1 })
     public void testRemoteHasNoIndexFailure() throws Exception {
         SearchRequest searchRequest = makeSearchRequest(REMOTE1 + ":no_such_index");
         CCSTelemetrySnapshot telemetry = getTelemetryFromFailedSearch(searchRequest);
@@ -689,40 +681,4 @@ private int indexDocs(Client client, String index) {
         return numDocs;
     }
 
-    /**
-     * Annotation to mark specific cluster in a test as not to be skipped when unavailable
-     */
-    @Retention(RetentionPolicy.RUNTIME)
-    @Target(ElementType.METHOD)
-    @interface SkipOverride {
-        String[] aliases();
-    }
-
-    /**
-     * Test rule to process skip annotations
-     */
-    static class SkipUnavailableRule implements TestRule {
-        private final Map<String, Boolean> skipMap;
-
-        SkipUnavailableRule(String... clusterAliases) {
-            this.skipMap = Arrays.stream(clusterAliases).collect(Collectors.toMap(Function.identity(), alias -> true));
-        }
-
-        public Map<String, Boolean> getMap() {
-            return skipMap;
-        }
-
-        @Override
-        public Statement apply(Statement base, Description description) {
-            // Check for annotation named "SkipOverride" and set the overrides accordingly
-            var aliases = description.getAnnotation(SkipOverride.class);
-            if (aliases != null) {
-                for (String alias : aliases.aliases()) {
-                    skipMap.put(alias, false);
-                }
-            }
-            return base;
-        }
-
-    }
 }

server/src/main/java/org/elasticsearch/TransportVersions.java

@@ -152,6 +152,8 @@ static TransportVersion def(int id) {
     public static final TransportVersion FAILURE_STORE_ENABLED_BY_CLUSTER_SETTING = def(8_812_00_0);
     public static final TransportVersion SIMULATE_IGNORED_FIELDS = def(8_813_00_0);
     public static final TransportVersion TRANSFORMS_UPGRADE_MODE = def(8_814_00_0);
+    public static final TransportVersion NODE_SHUTDOWN_EPHEMERAL_ID_ADDED = def(8_815_00_0);
+    public static final TransportVersion ESQL_CCS_TELEMETRY_STATS = def(8_816_00_0);
 
     /*
      * STOP! READ THIS FIRST! No, really,

server/src/main/java/org/elasticsearch/action/admin/cluster/stats/CCSTelemetrySnapshot.java

@@ -41,7 +41,6 @@
  * <br>
  */
 public final class CCSTelemetrySnapshot implements Writeable, ToXContentFragment {
-    public static final String CCS_TELEMETRY_FIELD_NAME = "_search";
     private long totalCount;
     private long successCount;
     private final Map<String, Long> failureReasons;
@@ -66,6 +65,9 @@ public final class CCSTelemetrySnapshot implements Writeable, ToXContentFragment
 
     private final Map<String, Long> clientCounts;
     private final Map<String, PerClusterCCSTelemetry> byRemoteCluster;
+    // Whether we should use per-MRT (minimize roundtrips) metrics.
+    // ES|QL does not have "minimize_roundtrips" option, so we don't collect those metrics for ES|QL usage.
+    private boolean useMRT = true;
 
     /**
     * Creates a new stats instance with the provided info.
@@ -191,6 +193,11 @@ public Map<String, PerClusterCCSTelemetry> getByRemoteCluster() {
         return Collections.unmodifiableMap(byRemoteCluster);
     }
 
+    public CCSTelemetrySnapshot setUseMRT(boolean useMRT) {
+        this.useMRT = useMRT;
+        return this;
+    }
+
     public static class PerClusterCCSTelemetry implements Writeable, ToXContentFragment {
         private long count;
         private long skippedCount;
@@ -270,6 +277,11 @@ public boolean equals(Object o) {
         public int hashCode() {
             return Objects.hash(count, skippedCount, took);
         }
+
+        @Override
+        public String toString() {
+            return Strings.toString(this, true, true);
+        }
     }
 
     /**
@@ -291,8 +303,10 @@ public void add(CCSTelemetrySnapshot stats) {
         stats.featureCounts.forEach((k, v) -> featureCounts.merge(k, v, Long::sum));
         stats.clientCounts.forEach((k, v) -> clientCounts.merge(k, v, Long::sum));
         took.add(stats.took);
-        tookMrtTrue.add(stats.tookMrtTrue);
-        tookMrtFalse.add(stats.tookMrtFalse);
+        if (useMRT) {
+            tookMrtTrue.add(stats.tookMrtTrue);
+            tookMrtFalse.add(stats.tookMrtFalse);
+        }
         remotesPerSearchMax = Math.max(remotesPerSearchMax, stats.remotesPerSearchMax);
         if (totalCount > 0 && oldCount > 0) {
             // Weighted average
@@ -328,30 +342,28 @@ private static void publishLatency(XContentBuilder builder, String name, LongMet
 
     @Override
     public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
-        builder.startObject(CCS_TELEMETRY_FIELD_NAME);
-        {
-            builder.field("total", totalCount);
-            builder.field("success", successCount);
-            builder.field("skipped", skippedRemotes);
-            publishLatency(builder, "took", took);
+        builder.field("total", totalCount);
+        builder.field("success", successCount);
+        builder.field("skipped", skippedRemotes);
+        publishLatency(builder, "took", took);
+        if (useMRT) {
             publishLatency(builder, "took_mrt_true", tookMrtTrue);
             publishLatency(builder, "took_mrt_false", tookMrtFalse);
-            builder.field("remotes_per_search_max", remotesPerSearchMax);
-            builder.field("remotes_per_search_avg", remotesPerSearchAvg);
-            builder.field("failure_reasons", failureReasons);
-            builder.field("features", featureCounts);
-            builder.field("clients", clientCounts);
-            builder.startObject("clusters");
-            {
-                for (var entry : byRemoteCluster.entrySet()) {
-                    String remoteName = entry.getKey();
-                    if (RemoteClusterAware.LOCAL_CLUSTER_GROUP_KEY.equals(remoteName)) {
-                        remoteName = SearchResponse.LOCAL_CLUSTER_NAME_REPRESENTATION;
-                    }
-                    builder.field(remoteName, entry.getValue());
+        }
+        builder.field("remotes_per_search_max", remotesPerSearchMax);
+        builder.field("remotes_per_search_avg", remotesPerSearchAvg);
+        builder.field("failure_reasons", failureReasons);
+        builder.field("features", featureCounts);
+        builder.field("clients", clientCounts);
+        builder.startObject("clusters");
+        {
+            for (var entry : byRemoteCluster.entrySet()) {
+                String remoteName = entry.getKey();
+                if (RemoteClusterAware.LOCAL_CLUSTER_GROUP_KEY.equals(remoteName)) {
+                    remoteName = SearchResponse.LOCAL_CLUSTER_NAME_REPRESENTATION;
                 }
+                builder.field(remoteName, entry.getValue());
             }
-            builder.endObject();
         }
         builder.endObject();
         return builder;

server/src/main/java/org/elasticsearch/action/admin/cluster/stats/CCSUsage.java

@@ -10,6 +10,7 @@
 package org.elasticsearch.action.admin.cluster.stats;
 
 import org.elasticsearch.ElasticsearchSecurityException;
+import org.elasticsearch.ElasticsearchStatusException;
 import org.elasticsearch.ExceptionsHelper;
 import org.elasticsearch.ResourceNotFoundException;
 import org.elasticsearch.action.ShardOperationFailedException;
@@ -20,6 +21,7 @@
 import org.elasticsearch.core.TimeValue;
 import org.elasticsearch.search.SearchShardTarget;
 import org.elasticsearch.search.query.SearchTimeoutException;
+import org.elasticsearch.tasks.Task;
 import org.elasticsearch.tasks.TaskCancelledException;
 
 import java.util.Arrays;
@@ -84,6 +86,15 @@ public Builder setClient(String client) {
             return this;
         }
 
+        public Builder setClientFromTask(Task task) {
+            String client = task.getHeader(Task.X_ELASTIC_PRODUCT_ORIGIN_HTTP_HEADER);
+            if (client != null) {
+                return setClient(client);
+            } else {
+                return this;
+            }
+        }
+
         public Builder skippedRemote(String remote) {
             this.skippedRemotes.add(remote);
             return this;
@@ -133,6 +144,10 @@ public static Result getFailureType(Exception e) {
             if (ExceptionsHelper.unwrapCorruption(e) != null) {
                 return Result.CORRUPTION;
             }
+            ElasticsearchStatusException se = (ElasticsearchStatusException) ExceptionsHelper.unwrap(e, ElasticsearchStatusException.class);
+            if (se != null && se.getDetailedMessage().contains("license")) {
+                return Result.LICENSE;
+            }
             // This is kind of last resort check - if we still don't know the reason but all shard failures are remote,
             // we assume it's remote's fault somehow.
             if (e instanceof SearchPhaseExecutionException spe) {

server/src/main/java/org/elasticsearch/action/admin/cluster/stats/CCSUsageTelemetry.java

@@ -47,6 +47,7 @@ public enum Result {
         TIMEOUT("timeout"),
         CORRUPTION("corruption"),
         SECURITY("security"),
+        LICENSE("license"),
         // May be helpful if there's a lot of other reasons, and it may be hard to calculate the unknowns for some clients.
         UNKNOWN("other");
 
@@ -106,8 +107,14 @@ public String getName() {
 
     private final Map<String, LongAdder> clientCounts;
     private final Map<String, PerClusterCCSTelemetry> byRemoteCluster;
+    // Should we calculate separate metrics per MRT?
+    private final boolean useMRT;
 
     public CCSUsageTelemetry() {
+        this(true);
+    }
+
+    public CCSUsageTelemetry(boolean useMRT) {
         this.byRemoteCluster = new ConcurrentHashMap<>();
         totalCount = new LongAdder();
         successCount = new LongAdder();
@@ -119,6 +126,7 @@ public CCSUsageTelemetry() {
         skippedRemotes = new LongAdder();
         featureCounts = new ConcurrentHashMap<>();
         clientCounts = new ConcurrentHashMap<>();
+        this.useMRT = useMRT;
     }
 
     public void updateUsage(CCSUsage ccsUsage) {
@@ -134,10 +142,12 @@ private void doUpdate(CCSUsage ccsUsage) {
         if (isSuccess(ccsUsage)) {
             successCount.increment();
             took.record(searchTook);
-            if (isMRT(ccsUsage)) {
-                tookMrtTrue.record(searchTook);
-            } else {
-                tookMrtFalse.record(searchTook);
+            if (useMRT) {
+                if (isMRT(ccsUsage)) {
+                    tookMrtTrue.record(searchTook);
+                } else {
+                    tookMrtFalse.record(searchTook);
+                }
             }
             ccsUsage.getPerClusterUsage().forEach((r, u) -> byRemoteCluster.computeIfAbsent(r, PerClusterCCSTelemetry::new).update(u));
         } else {
@@ -243,6 +253,6 @@ public CCSTelemetrySnapshot getCCSTelemetrySnapshot() {
             Collections.unmodifiableMap(Maps.transformValues(featureCounts, LongAdder::longValue)),
             Collections.unmodifiableMap(Maps.transformValues(clientCounts, LongAdder::longValue)),
             Collections.unmodifiableMap(Maps.transformValues(byRemoteCluster, PerClusterCCSTelemetry::getSnapshot))
-        );
+        ).setUseMRT(useMRT);
     }
 }