just tried the grouplens one, got some new errors:
$ mvn -X -e -q exec:java
-Dexec.mainClass="org.apache.mahout.cf.taste.example.grouplens.GroupLensRecommenderEvaluatorRunner"
-Dexec.args="-i
/home/yyang/work/mahout/trunk/examples/data/ml-1m/movies.dat"
[DEBUG] joining on thread
Thread[org.apache.mahout.cf.taste.example.grouplens.GroupLensRecommenderEvaluatorRunner.main(),5,org.apache.mahout.cf.taste.example.grouplens.GroupLensRecommenderEvaluatorRunner]
[DEBUG] Setting accessibility to true in order to invoke main().
11/10/21 14:00:20 INFO file.FileDataModel: Creating FileDataModel for
file /tmp/ratings.txt
11/10/21 14:00:20 INFO file.FileDataModel: Reading file info...
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] An exception occured while executing the Java class. null
For input string: "Toy Story (1995)"
[INFO] ------------------------------------------------------------------------
[DEBUG] 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:679)
Caused by: java.lang.NumberFormatException: For input string: "Toy Story (1995)"
at
java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Long.parseLong(Long.java:438)
at java.lang.Long.parseLong(Long.java:478)
at
org.apache.mahout.cf.taste.impl.model.file.FileDataModel.readItemIDFromString(FileDataModel.java:616)
at
org.apache.mahout.cf.taste.impl.model.file.FileDataModel.processLineWithoutID(FileDataModel.java:545)
at
org.apache.mahout.cf.taste.impl.model.file.FileDataModel.processFileWithoutID(FileDataModel.java:519)
at
org.apache.mahout.cf.taste.impl.model.file.FileDataModel.buildModel(FileDataModel.java:261)
at
org.apache.mahout.cf.taste.impl.model.file.FileDataModel.reload(FileDataModel.java:207)
at
org.apache.mahout.cf.taste.impl.model.file.FileDataModel.<init>(FileDataModel.java:193)
at
org.apache.mahout.cf.taste.impl.model.file.FileDataModel.<init>(FileDataModel.java:148)
at
org.apache.mahout.cf.taste.example.grouplens.GroupLensDataModel.<init>(GroupLensDataModel.java:51)
at
org.apache.mahout.cf.taste.example.grouplens.GroupLensRecommenderEvaluatorRunner.main(GroupLensRecommenderEvaluatorRunner.java:47)
... 6 more
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2 seconds
[INFO] Finished at: Fri Oct 21 14:00:20 PDT 2011
[INFO] Final Memory: 23M/127M
[INFO] ------------------------------------------------------------------------
On Fri, Oct 21, 2011 at 1:59 PM, Yang <[email protected]> wrote:
> could you please give a list (or document in wiki, or I could edit it
> ), which mvn exec job requires exactly which file?
>
> thanks
> Yang
>
> On Fri, Oct 21, 2011 at 1:56 PM, Sean Owen <[email protected]> wrote:
>> Um, you are running the Netflix example on the GroupLens data set. Of
>> course this doesn't work.
>>
>> On Fri, Oct 21, 2011 at 9:54 PM, Yang <[email protected]> wrote:
>>> I got the following errors when running:
>>>
>>> $ mvn -X -e -q exec:java
>>> -Dexec.mainClass="org.apache.mahout.cf.taste.example.netflix.NetflixRecommenderEvaluatorRunner"
>>> -Dexec.args="-i /home/yyang/work/mahout/trunk/examples/data/ml-1m/"
>>>
>>>
>>>
>>>
>>> [DEBUG] joining on thread
>>> Thread[org.apache.mahout.cf.taste.example.netflix.NetflixRecommenderEvaluatorRunner.main(),5,org.apache.mahout.cf.taste.example.netflix.NetflixRecommenderEvaluatorRunner]
>>> [DEBUG] Setting accessibility to true in order to invoke main().
>>> 11/10/21 13:52:01 INFO netflix.NetflixDataModel: Creating
>>> NetflixDataModel for directory:
>>> /home/yyang/work/mahout/trunk/examples/data/ml-1m
>>> 11/10/21 13:52:01 INFO netflix.NetflixDataModel: Reading preference data...
>>> [INFO]
>>> ------------------------------------------------------------------------
>>> [ERROR] BUILD ERROR
>>> [INFO]
>>> ------------------------------------------------------------------------
>>> [INFO] An exception occured while executing the Java class. null
>>>
>>> [INFO]
>>> ------------------------------------------------------------------------
>>> [DEBUG] 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:679)
>>> Caused by: java.lang.NullPointerException
>>> at
>>> org.apache.mahout.cf.taste.example.netflix.NetflixDataModel.readUsers(NetflixDataModel.java:79)
>>> at
>>> org.apache.mahout.cf.taste.example.netflix.NetflixDataModel.<init>(NetflixDataModel.java:68)
>>> at
>>> org.apache.mahout.cf.taste.example.netflix.NetflixRecommenderEvaluatorRunner.main(NetflixRecommenderEvaluatorRunner.java:44)
>>> ... 6 more
>>> [INFO]
>>> ------------------------------------------------------------------------
>>> [INFO] Total time: 2 seconds
>>> [INFO] Finished at: Fri Oct 21 13:52:01 PDT 2011
>>> [INFO] Final Memory: 23M/127M
>>> [INFO]
>>> ------------------------------------------------------------------------
>>>
>>>
>>> On Fri, Oct 21, 2011 at 1:21 AM, Sean Owen <[email protected]> wrote:
>>>> It depends on which example you are running! For GroupLens, yes, it's
>>>> the movies.dat file.
>>>>
>>>> I will warn you that I think the various GroupLens data sets have
>>>> different input formats. Some are comma-separated, which is what you
>>>> need, and some are separated by "::". Open the file and look. If it is
>>>> the latter, you need to change it to comma-separated form.
>>>>
>>>> On Thu, Oct 20, 2011 at 11:41 PM, Yang <[email protected]> wrote:
>>>>> in the recommendation examples
>>>>>
>>>>> https://cwiki.apache.org/confluence/display/MAHOUT/RecommendationExamples
>>>>>
>>>>> it mentions the "-i input_file " parameter,
>>>>>
>>>>> but the downloaded movie-lens dataset is a zip, and contains multiple
>>>>> .dat files, which one should I use?
>>>>>
>>>>> Thanks
>>>>> Yang
>>>>>
>>>>
>>>
>>>
>>> how do I debug this?
>>>
>>
>
