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From "Harsh J (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4659) Confusing output when running "hadoop version" from one hadoop installation when HADOOP_HOME points to another
Date Sat, 15 Sep 2012 03:44:08 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13456301#comment-13456301
] 

Harsh J commented on MAPREDUCE-4659:
------------------------------------

Good idea, I've seen this bite a few users before. Note though, that on 2.x and current 1.x,
the HADOOP_HOME was deprecated for HADOOP_PREFIX and per-component homes. So maybe we could
also look at HADOOP_COMMON_HOME, which is the lib set that has the VersionInfo?
                
> Confusing output when running "hadoop version" from one hadoop installation when HADOOP_HOME
points to another
> --------------------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-4659
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4659
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: client
>    Affects Versions: 0.20.2
>            Reporter: Sandy Ryza
>
> Hadoop version X is downloaded to ~/hadoop-x, and Hadoop version Y is downloaded to ~/hadoop-y.
 HADOOP_HOME is set to hadoop-x.  A user running hadoop-y/bin/hadoop might expect to be running
the hadoop-y jars, but, because of HADOOP_HOME, will actually be running hadoop-x jars.
> "hadoop version" could help clear this up a little by reporting the current HADOOP_HOME.

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