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Posted to common-issues@hadoop.apache.org by "Allen Wittenauer (JIRA)" <ji...@apache.org> on 2014/09/14 21:15:35 UTC
[jira] [Commented] (HADOOP-11092) hadoop shell commands should
print usage if not given a class
[ https://issues.apache.org/jira/browse/HADOOP-11092?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14133354#comment-14133354 ]
Allen Wittenauer commented on HADOOP-11092:
-------------------------------------------
* Moving this to common
* Rewriting the title
> hadoop shell commands should print usage if not given a class
> -------------------------------------------------------------
>
> Key: HADOOP-11092
> URL: https://issues.apache.org/jira/browse/HADOOP-11092
> Project: Hadoop Common
> Issue Type: Improvement
> Components: scripts
> Reporter: Bruno Mahé
> Labels: bigtop, noob
> Attachments: HDFS-2565.patch, HDFS-2565.patch
>
>
> [root@bigtop-fedora-15 ~]# hdfs foobar
> Exception in thread "main" java.lang.NoClassDefFoundError: foobar
> Caused by: java.lang.ClassNotFoundException: foobar
> at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
> at java.security.AccessController.doPrivileged(Native Method)
> at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
> at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
> Could not find the main class: foobar. Program will exit.
> Instead of loading any class, it would be nice to explain the command is not valid and to call print_usage()
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