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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-8874) HADOOP_HOME and -Dhadoop.home (from hadoop wrapper script) are not uniformly handled
Date Thu, 11 Oct 2012 11:41:03 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-8874?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13474048#comment-13474048
] 

Hadoop QA commented on HADOOP-8874:
-----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12548728/fix_home.patch
  against trunk revision .

    {color:red}-1 patch{color}.  The patch command could not apply the patch.

Console output: https://builds.apache.org/job/PreCommit-HADOOP-Build/1609//console

This message is automatically generated.
                
> HADOOP_HOME and -Dhadoop.home (from hadoop wrapper script) are not uniformly handled
> ------------------------------------------------------------------------------------
>
>                 Key: HADOOP-8874
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8874
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: scripts, security
>    Affects Versions: 1-win
>         Environment: Called from external process with -D flag vs HADOOP_HOME set.
>            Reporter: John Gordon
>              Labels: security
>             Fix For: 1-win
>
>         Attachments: fix_home.patch
>
>
> There is a -D flag to set hadoop.home, which is specified in the hadoop wrapper scripts.
 This is particularly useful if you want SxS execution of two or more versions of hadoop (e.g.
rolling upgrade).  However, it isn't honored at all.  HADOOP_HOME is used in 3-4 places to
find non-java hadoop components such as schedulers, scripts, shared libraries, or with the
Windows changes -- binaries.
> Ideally, these should all resolve the path in a consistent manner, and callers shuold
have a similar onus applied when trying to resolve an invalid path to their components.  This
is particularly relevant to scripts or binaries that may have security impact, as absolute
path resolution is generally safer and more stable than relative path resolution.

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