diff --git a/hadoop-common-project/hadoop-kms/src/main/resources/kms-default.xml b/hadoop-common-project/hadoop-kms/src/main/resources/kms-default.xml
index 9f4171bf79..434adcbc8a 100644
--- a/hadoop-common-project/hadoop-kms/src/main/resources/kms-default.xml
+++ b/hadoop-common-project/hadoop-kms/src/main/resources/kms-default.xml
@@ -93,6 +93,14 @@
     </description>
   </property>
 
+  <property>
+    <name>hadoop.http.socket.backlog.size</name>
+    <value>500</value>
+    <description>
+      KMS Server accept queue size.
+    </description>
+  </property>
+
   <!-- KMS Backend KeyProvider -->
 
   <property>