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https://issues.apache.org/jira/browse/HADOOP-7810?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13147174#comment-13147174
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Owen O'Malley commented on HADOOP-7810:
---------------------------------------

This has implications for modularity, in particular, it will make it more 
difficult to use a different version of any of the tools.
                
> add hadoop-tools.jar to 'hadoop classpath'
> ------------------------------------------
>
>                 Key: HADOOP-7810
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7810
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 0.20.205.0
>            Reporter: John George
>            Assignee: John George
>             Fix For: 0.20.205.1
>
>         Attachments: hadoop-7810.branch-0.20-security.patch
>
>
> "The HadoopArchieves classes are included in the 
> $HADOOP_HOME/hadoop_tools.jar, but this file is not found in `hadoop 
> classpath`.
> A Pig script using HCatalog's dynamic partitioning with HAR enabled will 
> therefore fail if a jar with HAR is not included in the pig call's '-cp' and 
> '-Dpig.additional.jars' arguments."
> I am not aware of any reason to not include hadoop-tools.jar in 'hadoop 
> classpath'. Will attach a patch soon.

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