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? >> >
