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https://issues.apache.org/jira/browse/MAPREDUCE-3432?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Allen Wittenauer resolved MAPREDUCE-3432.
-----------------------------------------
Resolution: Not a Problem
Fixed.
> 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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