MAPREDUCE-3907. Document entries mapred-default.xml for the jobhistory server. Contributed by Eugene Koontz. (harsh)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1358892 13f79535-47bb-0310-9956-ffa450edef68

hadoop-mapreduce-project/CHANGES.txt

@@ -151,6 +151,9 @@ Branch-2 ( Unreleased changes )
     MAPREDUCE-2220. Fix new API FileOutputFormat-related typos in
     mapred-default.xml (Rui Kubo via harsh)
 
+    MAPREDUCE-3907. Document entries mapred-default.xml for the
+    jobhistory server. (Eugene Koontz via harsh)
+
   OPTIMIZATIONS
 
   BUG FIXES

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

@@ -1285,7 +1285,7 @@
 <property>
   <name>mapreduce.jobhistory.address</name>
   <value>0.0.0.0:10020</value>
-  <description>MapReduce JobHistory Server host:port</description>
+  <description>MapReduce JobHistory Server IPC host:port</description>
 </property>
 
 <property>
@@ -1294,4 +1294,21 @@
   <description>MapReduce JobHistory Server Web UI host:port</description>
 </property>
 
+<property>
+  <name>mapreduce.jobhistory.keytab</name>
+  <description>
+    Location of the kerberos keytab file for the MapReduce
+    JobHistory Server.
+  </description>
+  <value>/etc/security/keytab/jhs.service.keytab</value>
+</property>
+
+<property>
+  <name>mapreduce.jobhistory.principal</name>
+  <description>
+    Kerberos principal name for the MapReduce JobHistory Server.
+  </description>
+  <value>jhs/_HOST@REALM.TLD</value>
+</property>
+
 </configuration>