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From "Arun C Murthy (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2370) Distcp not working due to NoClassDefFoundError: org/apache/hadoop/tools/DistCp
Date Tue, 27 Sep 2011 07:39:12 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2370?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13115293#comment-13115293

Arun C Murthy commented on HDFS-2370:

As Uma mentioned this is a general problem with hadoop-0.21 and beyond.

bin/hadoop is in Hadoop Common and we need to ensure we deploy correctly so that MapReduce
jars are in the CLASSPATH.
> Distcp not working due to NoClassDefFoundError: org/apache/hadoop/tools/DistCp
> ------------------------------------------------------------------------------
>                 Key: HDFS-2370
>                 URL: https://issues.apache.org/jira/browse/HDFS-2370
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: tools
>    Affects Versions: 0.23.0
>            Reporter: Rajit
> $HADOOP_COMMON_HOME/bin/hadoop --config $HADOOP_CONF_DIR  distcp
> hdfs://<NN1>:8020/tmp/input 
> hdfs://<NN1>:8020/tmp/output
> Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/tools/DistCp
> Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.tools.DistCp
>         at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
>         at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
> Could not find the main class: org.apache.hadoop.tools.DistCp.  Program will exit.
> it used to work before, do we need to export any environment variable? does distcp changed
its place?

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