[YARN-1329] yarn-config.sh overwrites YARN_CONF_DIR indiscriminately

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Cannot Reproduce
• Component/s: nodemanager, resourcemanager
• Target Version/s: 2.3.0
• Assignee: haosdent
• Reporter: Aaron Gottlieb
• Created: 21/Oct/13 17:44
• Updated: 08/May/15 16:24
• Resolved: 08/May/15 16:20

Description

The script yarn-daemons.sh calls

${HADOOP_LIBEXEC_DIR}/yarn-config.sh

yarn-config.sh overwrites any previously set value of environment variable YARN_CONF_DIR starting at line 40:

yarn-config.sh

#check to see if the conf dir is given as an optional argument
if [ $# -gt 1 ]
then
    if [ "--config" = "$1" ]
	  then
	      shift
	      confdir=$1
	      shift
	      YARN_CONF_DIR=$confdir
    fi
fi
 
# Allow alternate conf dir location.
export YARN_CONF_DIR="${HADOOP_CONF_DIR:-$HADOOP_YARN_HOME/conf}"

The last line should check for the existence of YARN_CONF_DIR first.

DEFAULT_CONF_DIR="${HADOOP_CONF_DIR:-$YARN_HOME/conf}"
export YARN_CONF_DIR="${YARN_CONF_DIR:-$DEFAULT_CONF_DIR}"