diff --git a/src/main/java/com/o19s/ubi/data/OpenSearchDataManager.java b/src/main/java/com/o19s/ubi/data/OpenSearchDataManager.java
index c177200..200bb7a 100644
--- a/src/main/java/com/o19s/ubi/data/OpenSearchDataManager.java
+++ b/src/main/java/com/o19s/ubi/data/OpenSearchDataManager.java
@@ -13,10 +13,13 @@
 import com.o19s.ubi.utils.UbiUtils;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
+import org.opensearch.action.bulk.BulkItemResponse;
 import org.opensearch.action.bulk.BulkRequest;
+import org.opensearch.action.bulk.BulkResponse;
 import org.opensearch.action.index.IndexRequest;
 import org.opensearch.client.Client;
 import org.opensearch.common.xcontent.XContentType;
+import org.opensearch.rest.action.RestActionListener;
 
 import java.util.Collection;
 import java.util.HashMap;
@@ -48,11 +51,12 @@ public class OpenSearchDataManager extends DataManager {
 
     /**
      * Gets a singleton instance of the manager.
+     *
      * @param client An OpenSearch {@link Client}.
      * @return An instance of {@link OpenSearchDataManager}.
      */
     public static OpenSearchDataManager getInstance(Client client) {
-        if(openSearchEventManager == null) {
+        if (openSearchEventManager == null) {
             openSearchEventManager = new OpenSearchDataManager(client);
         }
         return openSearchEventManager;
@@ -77,8 +81,25 @@ public void processEvents() {
                     .map(event -> new IndexRequest(event.getIndexName()).source(event.getEvent(), XContentType.JSON))
                     .forEach(eventsBulkRequest::add);
 
-            if(eventsBulkRequest.numberOfActions() > 0) {
-                client.bulk(eventsBulkRequest);
+            if (eventsBulkRequest.numberOfActions() > 0) {
+
+                LOGGER.trace("UBI bulk indexing " + eventsBulkRequest.numberOfActions() + " events.");
+
+                client.bulk(eventsBulkRequest, new RestActionListener<>(null) {
+
+                    @Override
+                    public void processResponse(final BulkResponse bulkResponse) {
+
+                        if (bulkResponse.hasFailures()) {
+                            for (final BulkItemResponse bulkItemResponse : bulkResponse.getItems()) {
+                                if (bulkItemResponse.isFailed()) {
+                                    LOGGER.warn("Unable to insert UBI event: " + bulkItemResponse.getFailureMessage());
+                                }
+                            }
+                        }
+
+                    }
+                });
             }
 
         } catch (Exception ex) {
@@ -102,10 +123,24 @@ public void processQueries() {
                             .source(buildQueryRequestMap(queryRequest), XContentType.JSON))
                     .forEach(queryRequestsBulkRequest::add);
 
-            LOGGER.trace("Indexing " + queryRequestsBulkRequest.numberOfActions() + " queries");
+            LOGGER.trace("UBI bulk indexing " + queryRequestsBulkRequest.numberOfActions() + " queries.");
 
             if (queryRequestsBulkRequest.numberOfActions() > 0) {
-                client.bulk(queryRequestsBulkRequest);
+                client.bulk(queryRequestsBulkRequest, new RestActionListener<>(null) {
+
+                    @Override
+                    public void processResponse(final BulkResponse bulkResponse) {
+
+                        if (bulkResponse.hasFailures()) {
+                            for (final BulkItemResponse bulkItemResponse : bulkResponse.getItems()) {
+                                if (bulkItemResponse.isFailed()) {
+                                    LOGGER.warn("Unable to insert UBI query: " + bulkItemResponse.getFailureMessage());
+                                }
+                            }
+                        }
+
+                    }
+                });
             }
 
         } catch (Exception ex) {
diff --git a/src/main/java/com/o19s/ubi/rest/UserBehaviorInsightsRestHandler.java b/src/main/java/com/o19s/ubi/rest/UserBehaviorInsightsRestHandler.java
index c0873bc..90758c7 100644
--- a/src/main/java/com/o19s/ubi/rest/UserBehaviorInsightsRestHandler.java
+++ b/src/main/java/com/o19s/ubi/rest/UserBehaviorInsightsRestHandler.java
@@ -286,7 +286,7 @@ protected void processResponse(AcknowledgedResponse acknowledgedResponse) throws
 
     private String setEventTimestamp(final String eventJson) throws JsonProcessingException {
 
-        LOGGER.info("event json: " + eventJson);
+        LOGGER.trace("Received UBI event json: " + eventJson);
 
         final JsonNode rootNode = new ObjectMapper().readTree(eventJson);