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From "Jason Lowe (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3194) "mapred mradmin" command is broken in mrv2
Date Tue, 17 Jan 2012 20:57:39 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3194?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13187992#comment-13187992
] 

Jason Lowe commented on MAPREDUCE-3194:
---------------------------------------

As I understand it, the mradmin command doesn't apply in mrv2.  The closest equivalent is
the yarn rmadmin command.  Also the tasktracker and jobtracker commands don't make sense in
mrv2.  Shall we just remove these commands from the help message and potentially point people
towards the yarn shell command if they try to use them?

As for the ant-generated jar that does contain the mradmin, I believe that jar was generated
for some legacy MR tests that haven't been ported to mrv2 yet.  I don't think that jar is
intended to be released with the distribution.
                
> "mapred mradmin" command is broken in mrv2
> ------------------------------------------
>
>                 Key: MAPREDUCE-3194
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3194
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 0.23.0
>            Reporter: Siddharth Seth
>
> $mapred  mradmin  
> Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/mapred/tools/MRAdmin
> Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.mapred.tools.MRAdmin
>         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.mapred.tools.MRAdmin.  Program will
exit.

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