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https://issues.apache.org/jira/browse/YARN-1329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14533468#comment-14533468
 ] 

Li Lu commented on YARN-1329:
-----------------------------

Quick note: this patch no longer applies to trunk. The current yarn-config.sh 
does not perform {{export YARN_CONF_DIR}}. We may want to verify if the problem 
still exists. 

> yarn-config.sh overwrites YARN_CONF_DIR indiscriminately 
> ---------------------------------------------------------
>
>                 Key: YARN-1329
>                 URL: https://issues.apache.org/jira/browse/YARN-1329
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager, resourcemanager
>            Reporter: Aaron Gottlieb
>            Assignee: haosdent
>              Labels: BB2015-05-TBR, easyfix
>         Attachments: YARN-1329.patch
>
>
> The script yarn-daemons.sh calls 
> {code}${HADOOP_LIBEXEC_DIR}/yarn-config.sh{code}
> yarn-config.sh overwrites any previously set value of environment variable 
> YARN_CONF_DIR starting at line 40:
> {code:title=yarn-config.sh|borderStyle=solid}
> #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}"
> {code}
> The last line should check for the existence of YARN_CONF_DIR first.
> {code}
> DEFAULT_CONF_DIR="${HADOOP_CONF_DIR:-$YARN_HOME/conf}"
> export YARN_CONF_DIR="${YARN_CONF_DIR:-$DEFAULT_CONF_DIR}"
> {code}



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