[ML] Stop timing stats failure propagation (#49495) (#49501)

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

@@ -117,13 +117,7 @@ class DatafeedJob {
     }
 
     public void finishReportingTimingStats() {
-        try {
         timingStatsReporter.finishReporting();
-        } catch (Exception e) {
-            // We don't want the exception to propagate out of this method as it can leave the datafeed in the "stopping" state forever.
-            // Since persisting datafeed timing stats is not critical, we just log a warning here.
-            LOGGER.warn("[{}] Datafeed timing stats could not be reported due to: {}", jobId, e);
-        }
     }
 
     Long runLookBack(long startTime, Long endTime) throws Exception {

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

@@ -5,6 +5,9 @@
  */
 package org.elasticsearch.xpack.ml.datafeed;
 
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.apache.logging.log4j.message.ParameterizedMessage;
 import org.elasticsearch.action.support.WriteRequest;
 import org.elasticsearch.common.unit.TimeValue;
 import org.elasticsearch.xpack.core.ml.datafeed.DatafeedTimingStats;
@@ -20,6 +23,7 @@ import java.util.Objects;
  */
 public class DatafeedTimingStatsReporter {
 
+    private static final Logger LOGGER = LogManager.getLogger(DatafeedTimingStatsReporter.class);
     /** Interface used for persisting current timing stats to the results index. */
     @FunctionalInterface
     public interface DatafeedTimingStatsPersister {
@@ -96,7 +100,14 @@ public class DatafeedTimingStatsReporter {
     private void flush(WriteRequest.RefreshPolicy refreshPolicy) {
         persistedTimingStats = new DatafeedTimingStats(currentTimingStats);
         if (allowedPersisting) {
+            try {
                 persister.persistDatafeedTimingStats(persistedTimingStats, refreshPolicy);
+            } catch (Exception ex) {
+                // Since persisting datafeed timing stats is not critical, we just log a warning here.
+                LOGGER.warn(
+                    () -> new ParameterizedMessage("[{}] failed to report datafeed timing stats", currentTimingStats.getJobId()),
+                    ex);
+            }
         }
     }
 

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

@@ -12,7 +12,6 @@ import org.elasticsearch.action.index.IndexResponse;
 import org.elasticsearch.client.Client;
 import org.elasticsearch.common.bytes.BytesArray;
 import org.elasticsearch.common.settings.Settings;
-import org.elasticsearch.common.util.concurrent.EsRejectedExecutionException;
 import org.elasticsearch.common.util.concurrent.ThreadContext;
 import org.elasticsearch.common.xcontent.ToXContent;
 import org.elasticsearch.common.xcontent.XContentBuilder;
@@ -61,7 +60,6 @@ import static org.mockito.Matchers.anyLong;
 import static org.mockito.Matchers.eq;
 import static org.mockito.Matchers.same;
 import static org.mockito.Mockito.atMost;
-import static org.mockito.Mockito.doThrow;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.times;
@@ -456,15 +454,6 @@ public class DatafeedJobTests extends ESTestCase {
         assertThat(analysisProblemException.shouldStop, is(true));
     }
 
-    public void testFinishReportingTimingStats() {
-        doThrow(new EsRejectedExecutionException()).when(timingStatsReporter).finishReporting();
-
-        long frequencyMs = 100;
-        long queryDelayMs = 1000;
-        DatafeedJob datafeedJob = createDatafeedJob(frequencyMs, queryDelayMs, 1000, -1, randomBoolean());
-        datafeedJob.finishReportingTimingStats();
-    }
-
     private DatafeedJob createDatafeedJob(long frequencyMs, long queryDelayMs, long latestFinalBucketEndTimeMs,
                                           long latestRecordTimeMs, boolean haveSeenDataPreviously) {
         Supplier<Long> currentTimeSupplier = () -> currentTime;

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

@@ -5,6 +5,7 @@
  */
 package org.elasticsearch.xpack.ml.datafeed;
 
+import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.action.support.WriteRequest.RefreshPolicy;
 import org.elasticsearch.common.unit.TimeValue;
 import org.elasticsearch.test.ESTestCase;
@@ -18,8 +19,10 @@ import org.mockito.InOrder;
 import java.sql.Date;
 import java.time.Instant;
 
+import static org.elasticsearch.mock.orig.Mockito.doThrow;
 import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.Matchers.is;
+import static org.mockito.Matchers.any;
 import static org.mockito.Mockito.inOrder;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.verify;
@@ -176,6 +179,18 @@ public class DatafeedTimingStatsReporterTests extends ESTestCase {
             is(true));
     }
 
+    public void testFinishReportingTimingStatsException() {
+        doThrow(new ElasticsearchException("BOOM")).when(timingStatsPersister).persistDatafeedTimingStats(any(), any());
+        DatafeedTimingStatsReporter reporter = createReporter(new DatafeedTimingStats(JOB_ID));
+
+        try {
+            reporter.reportDataCounts(createDataCounts(0, TIMESTAMP));
+            reporter.finishReporting();
+        } catch (ElasticsearchException ex) {
+            fail("Should not have failed with: " + ex.getDetailedMessage());
+        }
+    }
+
     private DatafeedTimingStatsReporter createReporter(DatafeedTimingStats timingStats) {
         return new DatafeedTimingStatsReporter(timingStats, timingStatsPersister);
     }