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Date: Fri, 27 Jan 2012 17:50:12 +0000 (UTC)
From: "Jason Lowe (Created) (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
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Subject: [jira] [Created] (HADOOP-7999) "hadoop archive" fails with
 ClassNotFoundException
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"hadoop archive" fails with ClassNotFoundException
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                 Key: HADOOP-7999
                 URL: https://issues.apache.org/jira/browse/HADOOP-7999
             Project: Hadoop Common
          Issue Type: Bug
          Components: scripts
    Affects Versions: 0.24.0, 0.23.1
            Reporter: Jason Lowe
            Assignee: Jason Lowe


Running "hadoop archive" from a command prompt results in this error:

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/tools/HadoopArchives
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.tools.HadoopArchives
	at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
Could not find the main class: org.apache.hadoop.tools.HadoopArchives.  Program will exit.


The hadoop front-end script expects the TOOL_PATH environment variable to be set, but nothing provides a default value for it if it is not set.  Since $TOOL_PATH expands to nothing, the hadoop-archives jar under share/hadoop/tools/lib isn't found, and we end up with a ClassNotFound exception.

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