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");
                         }
                     }