From b5fe565c89b3326b3f6fd337967e565b3d9c986b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Przemys=C5=82aw=20Witek?= <przemyslaw.witek@elastic.co>
Date: Wed, 15 Apr 2020 15:01:17 +0200
Subject: [PATCH] Add log line that will help debug item failures during multi
 search request (#55220) (#55227)

---
 .../ml/action/TransportGetDataFrameAnalyticsStatsAction.java | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/x-pack/plugin/ml/src/main/java/org/elasticsearch/xpack/ml/action/TransportGetDataFrameAnalyticsStatsAction.java b/x-pack/plugin/ml/src/main/java/org/elasticsearch/xpack/ml/action/TransportGetDataFrameAnalyticsStatsAction.java
index 9af995bba44..5f992dc809e 100644
--- a/x-pack/plugin/ml/src/main/java/org/elasticsearch/xpack/ml/action/TransportGetDataFrameAnalyticsStatsAction.java
+++ b/x-pack/plugin/ml/src/main/java/org/elasticsearch/xpack/ml/action/TransportGetDataFrameAnalyticsStatsAction.java
@@ -7,6 +7,7 @@ package org.elasticsearch.xpack.ml.action;
 
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
+import org.apache.logging.log4j.message.ParameterizedMessage;
 import org.elasticsearch.action.ActionListener;
 import org.elasticsearch.action.FailedNodeException;
 import org.elasticsearch.action.TaskOperationFailure;
@@ -211,6 +212,10 @@ public class TransportGetDataFrameAnalyticsStatsAction
             multiSearchResponse -> {
                 for (MultiSearchResponse.Item itemResponse : multiSearchResponse.getResponses()) {
                     if (itemResponse.isFailure()) {
+                        logger.error(
+                            new ParameterizedMessage(
+                                "[{}] Item failure encountered during multi search: {}", configId, itemResponse.getFailureMessage()),
+                            itemResponse.getFailure());
                         listener.onFailure(ExceptionsHelper.serverError(itemResponse.getFailureMessage(), itemResponse.getFailure()));
                         return;
                     } else {