document fix for MAPREDUCE-7425 (#5090)

Reviewed-by: Ashutosh Gupta <ashutosh.gupta@st.niituniversity.in>
Signed-off-by: Chris Nauroth <cnauroth@apache.org>
(cherry picked from commit 388f2f1)
(cherry picked from commit 4da1cad)

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/resources/mapred-default.xml

@@ -1590,14 +1590,18 @@
   <name>yarn.app.mapreduce.client-am.ipc.max-retries</name>
   <value>3</value>
   <description>The number of client retries to the AM - before reconnecting
-    to the RM to fetch Application Status.</description>
+    to the RM to fetch Application Status.
+    In other words, it is the ipc.client.connect.max.retries to be used during
+    reconnecting to the RM and fetching Application Status.</description>
 </property>
 
 <property>
   <name>yarn.app.mapreduce.client-am.ipc.max-retries-on-timeouts</name>
   <value>3</value>
   <description>The number of client retries on socket timeouts to the AM - before
-    reconnecting to the RM to fetch Application Status.</description>
+    reconnecting to the RM to fetch Application Status.
+    In other words, it is the ipc.client.connect.max.retries.on.timeouts to be used during
+    reconnecting to the RM and fetching Application Status.</description>
 </property>
 
 <property>