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https://issues.apache.org/jira/browse/HADOOP-11393?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Allen Wittenauer updated HADOOP-11393:
--------------------------------------
    Attachment: HADOOP-11393.03.patch

-03:
* rename trace's DEFAULT_HADOOP_PREFIX to DEFAULT_HADOOP_TRACE_PREFIX to 
eliminate confusion

It'd be good if someone could review this one so we can get this into 3.0.

> Revert HADOOP_PREFIX, go back to HADOOP_HOME
> --------------------------------------------
>
>                 Key: HADOOP-11393
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11393
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: scripts, tracing
>    Affects Versions: 3.0.0
>            Reporter: Allen Wittenauer
>            Assignee: Allen Wittenauer
>         Attachments: HADOOP-11393-00.patch, HADOOP-11393.01.patch, 
> HADOOP-11393.02.patch, HADOOP-11393.03.patch
>
>
> Today, Windows and parts of the Hadoop source code still use HADOOP_HOME.  
> The switch to HADOOP_PREFIX back in 0.21 or so didn't really accomplish what 
> it was intended to do and only helped confuse the situation.
> _HOME is a much more standard suffix and is, in fact, used for everything in 
> Hadoop except for the top level project home.  I think it would be beneficial 
> to use HADOOP_HOME in the shell code as the Official(tm) variable, still 
> honoring HADOOP_PREFIX if it is set.



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