MAPREDUCE-3408. yarn-daemon.sh unconditionnaly sets yarn.root.logger (Bruno Mahe via mahadev)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1205200 13f79535-47bb-0310-9956-ffa450edef68

hadoop-mapreduce-project/CHANGES.txt

@@ -164,6 +164,9 @@ Release 0.23.1 - Unreleased
     MAPREDUCE-3454. [Gridmix] TestDistCacheEmulation is broken (Hitesh Shah
     via mahadev)
 
+    MAPREDUCE-3408. yarn-daemon.sh unconditionnaly sets yarn.root.logger 
+    (Bruno Mahe via mahadev)
+
 Release 0.23.0 - 2011-11-01 
 
   INCOMPATIBLE CHANGES

hadoop-mapreduce-project/hadoop-yarn/bin/yarn-daemon.sh

@@ -87,8 +87,8 @@ fi
 
 # some variables
 export YARN_LOGFILE=yarn-$YARN_IDENT_STRING-$command-$HOSTNAME.log
-export YARN_ROOT_LOGGER="INFO,DRFA"
-export YARN_JHS_LOGGER="INFO,JSA"
+export YARN_ROOT_LOGGER=${YARN_ROOT_LOGGER:-INFO,DRFA}
+export YARN_JHS_LOGGER=${YARN_JHS_LOGGER:-INFO,JSA}
 log=$YARN_LOG_DIR/yarn-$YARN_IDENT_STRING-$command-$HOSTNAME.out
 pid=$YARN_PID_DIR/yarn-$YARN_IDENT_STRING-$command.pid