bin/hdfs should print a message when an invalid command is specified
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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
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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