diff --git a/hadoop-common-project/hadoop-common/src/main/conf/log4j.properties b/hadoop-common-project/hadoop-common/src/main/conf/log4j.properties
index b92ad27b67a..2ca667fe124 100644
--- a/hadoop-common-project/hadoop-common/src/main/conf/log4j.properties
+++ b/hadoop-common-project/hadoop-common/src/main/conf/log4j.properties
@@ -199,21 +199,26 @@ log4j.additivity.org.apache.hadoop.mapred.JobInProgress$JobSummary=false
 # Yarn ResourceManager Application Summary Log 
 #
 # Set the ResourceManager summary log filename
-#yarn.server.resourcemanager.appsummary.log.file=rm-appsummary.log
+yarn.server.resourcemanager.appsummary.log.file=rm-appsummary.log
 # Set the ResourceManager summary log level and appender
+yarn.server.resourcemanager.appsummary.logger=${hadoop.root.logger}
 #yarn.server.resourcemanager.appsummary.logger=INFO,RMSUMMARY
 
+# To enable AppSummaryLogging for the RM, 
+# set yarn.server.resourcemanager.appsummary.logger to 
+# <LEVEL>,RMSUMMARY in hadoop-env.sh
+
 # Appender for ResourceManager Application Summary Log
 # Requires the following properties to be set
 #    - hadoop.log.dir (Hadoop Log directory)
 #    - yarn.server.resourcemanager.appsummary.log.file (resource manager app summary log filename)
 #    - yarn.server.resourcemanager.appsummary.logger (resource manager app summary log level and appender)
 
-#log4j.logger.org.apache.hadoop.yarn.server.resourcemanager.RMAppManager$ApplicationSummary=${yarn.server.resourcemanager.appsummary.logger}
-#log4j.additivity.org.apache.hadoop.yarn.server.resourcemanager.RMAppManager$ApplicationSummary=false
-#log4j.appender.RMSUMMARY=org.apache.log4j.RollingFileAppender
-#log4j.appender.RMSUMMARY.File=${hadoop.log.dir}/${yarn.server.resourcemanager.appsummary.log.file}
-#log4j.appender.RMSUMMARY.MaxFileSize=256MB
-#log4j.appender.RMSUMMARY.MaxBackupIndex=20
-#log4j.appender.RMSUMMARY.layout=org.apache.log4j.PatternLayout
-#log4j.appender.RMSUMMARY.layout.ConversionPattern=%d{ISO8601} %p %c{2}: %m%n
+log4j.logger.org.apache.hadoop.yarn.server.resourcemanager.RMAppManager$ApplicationSummary=${yarn.server.resourcemanager.appsummary.logger}
+log4j.additivity.org.apache.hadoop.yarn.server.resourcemanager.RMAppManager$ApplicationSummary=false
+log4j.appender.RMSUMMARY=org.apache.log4j.RollingFileAppender
+log4j.appender.RMSUMMARY.File=${hadoop.log.dir}/${yarn.server.resourcemanager.appsummary.log.file}
+log4j.appender.RMSUMMARY.MaxFileSize=256MB
+log4j.appender.RMSUMMARY.MaxBackupIndex=20
+log4j.appender.RMSUMMARY.layout=org.apache.log4j.PatternLayout
+log4j.appender.RMSUMMARY.layout.ConversionPattern=%d{ISO8601} %p %c{2}: %m%n
diff --git a/hadoop-yarn-project/CHANGES.txt b/hadoop-yarn-project/CHANGES.txt
index 5506ab3aeb8..a9174e388a7 100644
--- a/hadoop-yarn-project/CHANGES.txt
+++ b/hadoop-yarn-project/CHANGES.txt
@@ -502,6 +502,9 @@ Release 2.1.0-beta - UNRELEASED
     YARN-117. Migrated rest of YARN to the new service model. (Steve Louhran via
     vinodkv)
 
+    YARN-812. Set default logger for application summary logger to
+    hadoop.root.logger. (sseth via acmurthy)
+
   BREAKDOWN OF HADOOP-8562 SUBTASKS AND RELATED JIRAS
 
     YARN-158. Yarn creating package-info.java must not depend on sh.