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Posted to user@mahout.apache.org by Neil Ghosh <ne...@gmail.com> on 2010/09/21 18:15:12 UTC
Build Error in Twenty Newsgroups Classification Example
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.
neil@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
Re: Build Error in Twenty Newsgroups Classification Example
Posted by Bhaskar Ghosh <bj...@yahoo.co.in>.
I am also getting errors while generating the input dataset as per the
following command from here
( https://cwiki.apache.org/MAHOUT/twenty-newsgroups.html ):
$ mkdir 20news-input $ 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"
The error I am getting is pated below:
>
>[INFO] [exec:java]
>[INFO] ------------------------------------------------------------------------
>[ERROR] BUILD ERROR
>[INFO] ------------------------------------------------------------------------
>[INFO] An exception occured while executing the Java class.
>org.apache.mahout.classifier.bayes.PrepareTwentyNewsgroups
>
>
>[INFO] ------------------------------------------------------------------------
>[INFO] Trace
>org.apache.maven.lifecycle.LifecycleExecutionException: An exception occured
>while executing the Java class.
>org.apache.mahout.classifier.bayes.PrepareTwentyNewsgroups
>at
>org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:583)
>
>at
>org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:512)
>
>at
>org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:482)
>
>at
>org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:330)
>
>at
>org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:291)
>
>at
>org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:142)
>
>at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:336)
>at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:129)
>at org.apache.maven.cli.MavenCli.main(MavenCli.java:287)
>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.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.
>org.apache.mahout.classifier.bayes.PrepareTwentyNewsgroups
>at org.codehaus.mojo.exec.ExecJavaMojo.execute(ExecJavaMojo.java:346)
>at
>org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:451)
>
>at
>org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:558)
>
>... 16 more
>Caused by: java.lang.ClassNotFoundException:
>org.apache.mahout.classifier.bayes.PrepareTwentyNewsgroups
>at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
>at java.security.AccessController.doPrivileged(Native Method)
>at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
>at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
>at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
>at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:284)
>at java.lang.Thread.run(Thread.java:619)
>
>
Any idea why this is happening? Appreciate any help.
Thanks
Bhaskar Ghosh
Hyderabad, India
http://www.google.com/profiles/bjgindia
"Ignorance is Bliss... Knowledge never brings Peace!!!"
________________________________
From: Neil Ghosh <ne...@gmail.com>
To: Ted Dunning <te...@gmail.com>
Cc: user@mahout.apache.org
Sent: Tue, 21 September, 2010 11:58:41 PM
Subject: Re: Build Error in Twenty Newsgroups Classification Example
Thanks Ted.
I just found that my [mvn install] on the root directory had completed with
error before trying this .
Then I did "cd" to "core" and "examples" and compiled and installed.Both
were successful.
After that this command ran fine and I could run the example.
On Tue, Sep 21, 2010 at 11:51 PM, Ted Dunning <te...@gmail.com> wrote:
> Did you do [mvn -DskipTests install] at the top level before trying this?
>
>
> On Tue, Sep 21, 2010 at 9:15 AM, Neil Ghosh <ne...@gmail.com> wrote:
>
>> Hi ,
>>
>> I am trying to run the example using Mahout 0.3 at
>> https://cwiki.apache.org/confluence/display/MAHOUT/Twenty+Newsgroups
>>
>> I have carried out all the steps but getting build error during this
>> command
>>
>> mvn -e exec:java \
>>
>> -Dexec.mainClass=org.apache.mahout.classifier.bayes.PrepareTwentyNewsgroups
>> \
>> -Dexec.args="-p 20news-18828 \
>> -o 20news-input \
>> -a org.apache.lucene.analysis.standard.StandardAnalyzer
>> \
>> -c UTF-8"
>>
>>
>> Please help, getting the following error.
>>
>> neil@neil-laptop:~/workspace/mahout-0.3/examples$ 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
>>
>
>
--
Thanks and Regards
Neil
http://neilghosh.com
Hello All,
Re: Build Error in Twenty Newsgroups Classification Example
Posted by Neil Ghosh <ne...@gmail.com>.
Thanks Ted.
I just found that my [mvn install] on the root directory had completed with
error before trying this .
Then I did "cd" to "core" and "examples" and compiled and installed.Both
were successful.
After that this command ran fine and I could run the example.
On Tue, Sep 21, 2010 at 11:51 PM, Ted Dunning <te...@gmail.com> wrote:
> Did you do [mvn -DskipTests install] at the top level before trying this?
>
>
> On Tue, Sep 21, 2010 at 9:15 AM, Neil Ghosh <ne...@gmail.com> wrote:
>
>> 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.
>>
>> neil@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$1.run(ExecJavaMojo.java:291)
>> at java.lang.Thread.run(Thread.java:636)
>> Caused by: java.lang.Error: Unresolved compilation problems:
>> DefaultOptionCreator cannot be resolved
>> CommandLineUtil cannot be resolved
>> BayesFileFormatter cannot be resolved
>> CommandLineUtil cannot be resolved
>>
>> at
>>
>> org.apache.mahout.classifier.bayes.PrepareTwentyNewsgroups.main(PrepareTwentyNewsgroups.java:52)
>> ... 6 more
>> [INFO]
>> ------------------------------------------------------------------------
>> [INFO] Total time: 3 seconds
>> [INFO] Finished at: Tue Sep 21 21:41:25 IST 2010
>> [INFO] Final Memory: 14M/34M
>> [INFO]
>> ------------------------------------------------------------------------
>>
>>
>>
>> --
>> Thanks and Regards
>> Neil
>> http://neilghosh.com
>>
>
>
--
Thanks and Regards
Neil
http://neilghosh.com
Re: Build Error in Twenty Newsgroups Classification Example
Posted by Ted Dunning <te...@gmail.com>.
Did you do [mvn -DskipTests install] at the top level before trying this?
On Tue, Sep 21, 2010 at 9:15 AM, Neil Ghosh <ne...@gmail.com> wrote:
> Hi ,
>
> I am trying to run the example using Mahout 0.3 at
> https://cwiki.apache.org/confluence/display/MAHOUT/Twenty+Newsgroups
>
> I have carried out all the steps but getting build error during this
> command
>
> mvn -e exec:java \
>
> -Dexec.mainClass=org.apache.mahout.classifier.bayes.PrepareTwentyNewsgroups
> \
> -Dexec.args="-p 20news-18828 \
> -o 20news-input \
> -a org.apache.lucene.analysis.standard.StandardAnalyzer \
> -c UTF-8"
>
>
> Please help, getting the following error.
>
> neil@neil-laptop:~/workspace/mahout-0.3/examples$ 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
>