HADOOP-18794. ipc.server.handler.queue.size missing from core-default.xml (#5819). Contributed by WangYuanben.

Reviewed-by: Hualong Zhang <hualong.z@hotmail.com>
Reviewed-by: Shilun Fan <slfan1989@apache.org>
Signed-off-by: Ayush Saxena <ayushsaxena@apache.org>

hadoop-common-project/hadoop-common/src/main/resources/core-default.xml

@@ -2321,6 +2321,15 @@ The switch to turn S3A auditing on or off.
   </description>
 </property>
 
+<property>
+  <name>ipc.server.handler.queue.size</name>
+  <value>100</value>
+  <description>
+    Indicates how many calls per handler are allowed in the queue. This value can
+    determine the maximum call queue size by multiplying the number of handler threads.
+  </description>
+</property>
+
 <property>
   <name>ipc.server.listen.queue.size</name>
   <value>256</value>