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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] Updated: (MAPREDUCE-852) ExampleDriver is incorrectly set as a Main-Class in tools in build.xml
Date Fri, 14 Aug 2009 18:23:14 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-852?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Tsz Wo (Nicholas), SZE updated MAPREDUCE-852:

        Assignee: Tsz Wo (Nicholas), SZE
    Release Note: Changed the target name from "tools-jar" to "tools" in build.xml.
    Hadoop Flags: [Incompatible change]
          Status: Patch Available  (was: Open)

Before the patch, there is a NoClassDefFoundError.
bash-3.2$ java -jar build/hadoop-mapred-tools-0.21.0-dev.jar 
java.lang.NoClassDefFoundError: org/apache/hadoop/examples/ExampleDriver
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.examples.ExampleDriver
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClassInternal(Unknown Source)
Could not find the main class: org/apache/hadoop/examples/ExampleDriver. Program will exit.

Tested "ant tools" locally with the patch.

> ExampleDriver is incorrectly set as a Main-Class in tools in build.xml
> ----------------------------------------------------------------------
>                 Key: MAPREDUCE-852
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-852
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: build
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: Tsz Wo (Nicholas), SZE
>         Attachments: m852_20090812.patch
> In build.xml,
> {code}
>   <target name="examples" depends="jar, compile-examples" description="Make the Hadoop
examples jar.">
> ...
>   <target name="tools-jar" depends="jar, compile-tools" 
>           description="Make the Hadoop tools jar.">
>     <jar jarfile="${build.dir}/${tools.final.name}.jar"
>          basedir="${build.tools}">
>       <manifest>
>         <attribute name="Main-Class" 
>                    value="org/apache/hadoop/examples/ExampleDriver"/>
>       </manifest>
>     </jar>
>   </target>
> {code}
> - ExampleDriver should not be a Main-Class of tools
> - Should we rename the target name from "tools-jar" to "tools", so that the name would
be consistent with the "examples" target?

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