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Date: Fri, 10 Sep 2010 14:39:35 -0700
Message-ID: <AANLkTin6UCdfAVX37pehq19C=JNoQTahnhEtUo32AwGr@mail.gmail.com>
Subject: Re: Running example
From: Lance Norskog <goksron@gmail.com>
To: user@mahout.apache.org
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Which page is this from? There are two or three pages in the wiki that
show how to run these examples, this is is an older one that doesn't
work any more.

Try searching the Mahout wiki for
BookCrossingRecommenderEvaluatorRunner and you should find the latest,
working one.

On Fri, Sep 10, 2010 at 1:58 PM, Defenestrator
<defenestrationism@gmail.com> wrote:
> Hi,
>
> I'm following the quickstart directions and am running into an error tryi=
ng
> to run an example. =C2=A0Looks like BookCrossingRecommenderEvaluatorRunne=
r is
> missing from the classpath. =C2=A0But can someone give me a pointer on ho=
w to run
> this?
>
> 1. svn up on mahout/trunk
> 2. mvn install in core
> 3. mvn install in examples
> 4. mvn -q exec:java
> -Dexec.mainClass=3D"org.apache.mahout.cf.taste.example.bookcrossing.BookC=
rossingRecommenderEvaluatorRunner"
> -X
>
> Error:
> org.apache.maven.lifecycle.LifecycleExecutionException: An exception occu=
red
> while executing the Java class.
> org.apache.mahout.cf.taste.example.bookcrossing.BookCrossingRecommenderEv=
aluatorRunner
> =C2=A0 =C2=A0at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultL=
ifecycleExecutor.java:719)
> =C2=A0 =C2=A0at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal=
(DefaultLifecycleExecutor.java:569)
> =C2=A0 =C2=A0at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLi=
fecycleExecutor.java:539)
> =C2=A0 =C2=A0at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleF=
ailures(DefaultLifecycleExecutor.java:387)
> =C2=A0 =C2=A0at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(D=
efaultLifecycleExecutor.java:348)
> =C2=A0 =C2=A0at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecy=
cleExecutor.java:180)
> =C2=A0 =C2=A0at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java=
:328)
> =C2=A0 =C2=A0at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:1=
38)
> =C2=A0 =C2=A0at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
> =C2=A0 =C2=A0at
> org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)
> =C2=A0 =C2=A0at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Metho=
d)
> =C2=A0 =C2=A0at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java=
:39)
> =C2=A0 =C2=A0at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorI=
mpl.java:25)
> =C2=A0 =C2=A0at java.lang.reflect.Method.invoke(Method.java:597)
> =C2=A0 =C2=A0at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher=
.java:315)
> =C2=A0 =C2=A0at org.codehaus.classworlds.Launcher.launch(Launcher.java:25=
5)
> =C2=A0 =C2=A0at org.codehaus.classworlds.Launcher.mainWithExitCode(Launch=
er.java:430)
> =C2=A0 =C2=A0at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
> Caused by: org.apache.maven.plugin.MojoExecutionException: An exception
> occured while executing the Java class.
> org.apache.mahout.cf.taste.example.bookcrossing.BookCrossingRecommenderEv=
aluatorRunner
> =C2=A0 =C2=A0at org.codehaus.mojo.exec.ExecJavaMojo.execute(ExecJavaMojo.=
java:346)
> =C2=A0 =C2=A0at
> org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginMan=
ager.java:490)
> =C2=A0 =C2=A0at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultL=
ifecycleExecutor.java:694)
> =C2=A0 =C2=A0... 17 more
> Caused by: java.lang.ClassNotFoundException:
> org.apache.mahout.cf.taste.example.bookcrossing.BookCrossingRecommenderEv=
aluatorRunner
> =C2=A0 =C2=A0at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
> =C2=A0 =C2=A0at java.security.AccessController.doPrivileged(Native Method=
)
> =C2=A0 =C2=A0at java.net.URLClassLoader.findClass(URLClassLoader.java:190=
)
> =C2=A0 =C2=A0at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
> =C2=A0 =C2=A0at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
> =C2=A0 =C2=A0at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.ja=
va:284)
> =C2=A0 =C2=A0at java.lang.Thread.run(Thread.java:619)
>


--=20
Lance Norskog
goksron@gmail.com