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https://issues.apache.org/jira/browse/HDFS-2930?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Joseph Evans updated HDFS-2930:
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Target Version/s: 2.0.0, 3.0.0 (was: 0.23.2)
> bin/hdfs should print a message when an invalid command is specified
> --------------------------------------------------------------------
>
> Key: HDFS-2930
> URL: https://issues.apache.org/jira/browse/HDFS-2930
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: tools
> Affects Versions: 0.23.1
> Reporter: Eli Collins
> Labels: newbie
> Attachments: HDFS-2930.patch
>
>
> hdfs will currently give a NoClassDefFoundError stacktrace if there's a typo
> specifying the command.
> {noformat}
> hadoop-0.24.0-SNAPSHOT $ ./bin/hdfs dfadmin
> Exception in thread "main" java.lang.NoClassDefFoundError: dfadmin
> Caused by: java.lang.ClassNotFoundException: dfadmin
> 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)
> {noformat}
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