Hi ,
I am trying to run the example using Mahout 0.3 at
https://cwiki.apache.org/confluence/display/MAHOUT/Twenty+Newsgroups
I have carried out all the steps but getting build error during this command
mvn -e exec:java \
-Dexec.mainClass=org.apache.mahout.classifier.bayes.PrepareTwentyNewsgroups
\
-Dexec.args="-p 20news-18828 \
-o 20news-input \
-a org.apache.lucene.analysis.standard.StandardAnalyzer \
-c UTF-8"
Please help, getting the following error.
n...@neil-laptop:~/workspace/mahout-0.3/examples$ mvn -e exec:java \
>
-Dexec.mainClass=org.apache.mahout.classifier.bayes.PrepareTwentyNewsgroups
\
> -Dexec.args="-p 20news-18828 \
> -o 20news-input \
> -a org.apache.lucene.analysis.standard.StandardAnalyzer
\
> -c UTF-8"
+ Error stacktraces are turned on.
[INFO] Scanning for projects...
[INFO] Searching repository for plugin with prefix: 'exec'.
[INFO]
------------------------------------------------------------------------
[INFO] Building Mahout Examples
[INFO] task-segment: [exec:java]
[INFO]
------------------------------------------------------------------------
[INFO] Preparing exec:java
[INFO] No goals needed for project - skipping
[INFO] [exec:java {execution: default-cli}]
[INFO]
------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO]
------------------------------------------------------------------------
[INFO] An exception occured while executing the Java class. null
Unresolved compilation problems:
DefaultOptionCreator cannot be resolved
CommandLineUtil cannot be resolved
BayesFileFormatter cannot be resolved
CommandLineUtil cannot be resolved
[INFO]
------------------------------------------------------------------------
[INFO] Trace
org.apache.maven.lifecycle.LifecycleExecutionException: An exception occured
while executing the Java class. null
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:719)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:569)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:539)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
at
org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: org.apache.maven.plugin.MojoExecutionException: An exception
occured while executing the Java class. null
at org.codehaus.mojo.exec.ExecJavaMojo.execute(ExecJavaMojo.java:346)
at
org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694)
... 17 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:291)
at java.lang.Thread.run(Thread.java:636)
Caused by: java.lang.Error: Unresolved compilation problems:
DefaultOptionCreator cannot be resolved
CommandLineUtil cannot be resolved
BayesFileFormatter cannot be resolved
CommandLineUtil cannot be resolved
at
org.apache.mahout.classifier.bayes.PrepareTwentyNewsgroups.main(PrepareTwentyNewsgroups.java:52)
... 6 more
[INFO]
------------------------------------------------------------------------
[INFO] Total time: 3 seconds
[INFO] Finished at: Tue Sep 21 21:41:25 IST 2010
[INFO] Final Memory: 14M/34M
[INFO]
------------------------------------------------------------------------
--
Thanks and Regards
Neil
http://neilghosh.com
