From 72b607bfa0c21b5fc11f892641dd171adc7a5bfb Mon Sep 17 00:00:00 2001
From: Ievgen Degtiarenko <ievgen.degtiarenko@elastic.co>
Date: Wed, 31 Jul 2024 09:08:16 +0200
Subject: [PATCH] Include a stack trace along with failure to flush warning
 (#111410)

---
 .../java/org/elasticsearch/index/engine/InternalEngine.java   | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/server/src/main/java/org/elasticsearch/index/engine/InternalEngine.java b/server/src/main/java/org/elasticsearch/index/engine/InternalEngine.java
index 70c593b590f5a..f7a78b10e671c 100644
--- a/server/src/main/java/org/elasticsearch/index/engine/InternalEngine.java
+++ b/server/src/main/java/org/elasticsearch/index/engine/InternalEngine.java
@@ -2850,7 +2850,9 @@ public synchronized void afterMerge(OnGoingMerge merge) {
                     @Override
                     public void onFailure(Exception e) {
                         if (isClosed.get() == false) {
-                            logger.warn("failed to flush after merge has finished");
+                            logger.warn("failed to flush after merge has finished", e);
+                        } else {
+                            logger.info("failed to flush after merge has finished during shard close");
                         }
                     }