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From Ted Dunning <ted.dunn...@gmail.com>
Subject Re: 20news example problem
Date Thu, 10 Feb 2011 16:24:15 GMT
Diego,

What platform are you on?

Have you set your classpath explicitly?

How did you install mahout?  By compiling it?

On Thu, Feb 10, 2011 at 2:49 AM, Diego Tejera <diegotejera@gmail.com> wrote:

> Hello everyone I am new to mahout, I am planning to use it for my
> undergraduate thesis, the thing is that when I try to run the 20news
> example
> i get the follow error: and also it says that  my HADOOP_HOME is not set
> but
> I do have it, and I already compiled and installed the core and the
> examples
>
> $MAHOUT_HOME/bin/mahout
> org.apache.mahout.classifier.bayes.PrepareTwentyNewsgroups -p
> examples/bin/work/20news-bydate/20news-bydate-train -o
> examples/bin/work/20news-bydate/bayes-train-input -a
> org.apache.mahout.vectorizer.DefaultAnalyzer -c UTF-8
> no HADOOP_CONF_DIR or HADOOP_HOME set, running locally
> Feb 10, 2011 5:38:51 AM org.slf4j.impl.JCLLoggerAdapter warn
> WARNING: No
> org.apache.mahout.classifier.bayes.PrepareTwentyNewsgroups.props
> found on classpath, will use command-line arguments only
> Feb 10, 2011 5:38:51 AM org.slf4j.impl.JCLLoggerAdapter error
> SEVERE: MahoutDriver failed with args: [-p,
> examples/bin/work/20news-bydate/20news-bydate-train, -o,
> examples/bin/work/20news-bydate/bayes-train-input, -a,
> org.apache.mahout.vectorizer.DefaultAnalyzer, -c, UTF-8, null]
> org.apache.mahout.vectorizer.DefaultAnalyzer
> Exception in thread "main" java.lang.ClassNotFoundException:
> org.apache.mahout.vectorizer.DefaultAnalyzer
> 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)
> at java.lang.Class.forName0(Native Method)
>  at java.lang.Class.forName(Class.java:169)
> at
>
> org.apache.mahout.classifier.bayes.PrepareTwentyNewsgroups.main(PrepareTwentyNewsgroups.java:87)
>  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
>
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>  at
>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
>  at
>
> org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:68)
> at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:139)
>  at org.apache.mahout.driver.MahoutDriver.main(MahoutDriver.java:172)
>
> Thanks a lot,
> --
> Diego Tejera
> http://diegotejera.org
>

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