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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7374) hadoop-config.sh shouldn't add tools.jar to the classpath
Date Sun, 12 Jun 2011 03:53:52 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7374?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13048218#comment-13048218
] 

Todd Lipcon commented on HADOOP-7374:
-------------------------------------

+1

> hadoop-config.sh shouldn't add tools.jar to the classpath
> ---------------------------------------------------------
>
>                 Key: HADOOP-7374
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7374
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: scripts
>            Reporter: Eli Collins
>            Assignee: Eli Collins
>         Attachments: hadoop-7374-1.patch
>
>
> bin/hadoop-config.sh (and bin/rcc) add lib/tools.jar from JAVA_HOME to the classpath.
This has been there since the initial commit of bin/hadoop, but I don't think it's needed.
*Executing* Hadoop does not depend on tools.jar (or other libraries only available in the
JDK, not the JRE) so let's not automatically add it. Marking this as an incompatible change
since a job could potentially have relied on Hadoop adding tools.jar to the CLASSPATH automatically
(though such a job would not have run on a system that did not have JAVA_HOME point to a jdk).
The build of course still requires a JDK.

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