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https://issues.apache.org/jira/browse/HADOOP-2993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12587866#action_12587866
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Edward J. Yoon commented on HADOOP-2993:
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That means the setting of the environment variable JAVA_HOME to the root of
your Java installation under your OS.
I don't think it must be fix, but i think we need to explain sth clearly to
save confusion. +1
> Specify which JAVA_HOME should be set
> -------------------------------------
>
> Key: HADOOP-2993
> URL: https://issues.apache.org/jira/browse/HADOOP-2993
> Project: Hadoop Core
> Issue Type: Improvement
> Components: documentation
> Affects Versions: site
> Environment: irrelevant---issue w/ web documentation
> Reporter: Jason Rennie
> Assignee: Edward J. Yoon
> Original Estimate: 0.08h
> Remaining Estimate: 0.08h
>
> Quickstart page (http://hadoop.apache.org/core/docs/current/quickstart.html)
> specifies that user should set JAVA_HOME under "1." of "Required Software".
> But, it does not specify where this should be set. My instinct (as would be
> the instinct of any un*x user) was to set this in his/her
> shell/profie/rcfile. Please specify that this should be specified in
> conf/hadoop-env.sh. Yes, this is clarified later under "Download", but is
> easy to miss, especially since the user will think that he/she had already
> set JAVA_HOME.
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