[jira] [Commented] (MAPREDUCE-3432) Yarn doesn't work if JAVA_HOME isn't set

["Miguel Ping (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3432?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13443985#comment-13443985 ] 

Miguel Ping commented on MAPREDUCE-3432:
----------------------------------------

My workaround (which is more of a fix) is to allow sudo to inherit some env variables. Edit the /etc/sudoers, and enable this behaviour:

{code:none} 
Defaults	env_keep+="JAVA_HOME"
{code} 

You can alternatively enable it for a user:
{code:none} 
Defaults:myusrname	env_keep+="JAVA_HOME"
{code} 
                
> Yarn doesn't work if JAVA_HOME isn't set
> ----------------------------------------
>
>                 Key: MAPREDUCE-3432
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3432
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 0.23.0
>         Environment: OS/X, JAVA_HOME unset
>            Reporter: Steve Loughran
>            Priority: Minor
>
> libexec/hadoop-config.sh does reliably work out JAVA_HOME for many platforms. unfortunately, the yarn scripts don't use it. As such you get told off when you try to run yarn
> {code}
> $ bin/yarn resourcemanager
> Error: JAVA_HOME is not set.
> {code}
> To make things more interesting, if you set the value in the shell, it still doesn't propagate down to the scripts
> {code}
> $ echo $JAVA_HOME
> $ source libexec/hadoop-config.sh 
> $ echo $JAVA_HOME
> /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
> $ bin/yarn resourcemanager
> Error: JAVA_HOME is not set.
> $echo $JAVA_HOME
> /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
> {code}

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