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https://issues.apache.org/jira/browse/HADOOP-6605?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13035654#comment-13035654
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Allen Wittenauer commented on HADOOP-6605:
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java_home is not a stable interface. It cannot be trusted to last, especially
given the question marks that hang over Java on OS X.
I'm -1 for a variety of reasons:
a) we're getting into platform specific code without a good reason
b) this could have significant performance ramifications as we add more and
more paths to support more and more OSes
c) there is a config option to specifically eliminate the need to do this
> Add JAVA_HOME detection to hadoop-config
> ----------------------------------------
>
> Key: HADOOP-6605
> URL: https://issues.apache.org/jira/browse/HADOOP-6605
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Chad Metcalf
> Assignee: Eli Collins
> Priority: Minor
> Fix For: 0.22.0
>
> Attachments: HADOOP-6605.patch, hadoop-6605-1.patch
>
>
> The commands that source hadoop-config.sh currently bail with an error if
> JAVA_HOME is not set. Let's detect JAVA_HOME (from a list of locations on
> various OS types) if JAVA_HOME is not already set by hadoop-env.sh or the
> environment. This way users don't have to manually configure it.
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