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From "Eli Collins (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-7374) Don't add tools.jar to the classpath when running Hadoop
Date Sun, 12 Jun 2011 04:15:51 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-7374?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Eli Collins updated HADOOP-7374:
--------------------------------

    Fix Version/s: 0.23.0
     Release Note: The scripts that run Hadoop no longer automatically add tools.jar from
the JDK to the classpath (if it is present). If your job depends on tools.jar in the JDK you
will need to add this dependency in your job.
     Hadoop Flags: [Incompatible change, Reviewed]  (was: [Incompatible change])
          Summary: Don't add tools.jar to the classpath when running Hadoop  (was: hadoop-config.sh
shouldn't add tools.jar to the classpath)

Thanks Todd! I've committed this.

> Don't add tools.jar to the classpath when running Hadoop
> --------------------------------------------------------
>
>                 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
>             Fix For: 0.23.0
>
>         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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