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From "Hudson (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAHOUT-844) RowSimilarityJob in Item Similarity workflow does not pickup default similarity measure
Date Tue, 18 Oct 2011 00:36:10 GMT

    [ https://issues.apache.org/jira/browse/MAHOUT-844?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13129375#comment-13129375
] 

Hudson commented on MAHOUT-844:
-------------------------------

Integrated in Mahout-Quality #1098 (See [https://builds.apache.org/job/Mahout-Quality/1098/])
    MAHOUT-844 make RecommenderJob similarity required

srowen : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1185379
Files : 
* /mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/hadoop/item/RecommenderJob.java

                
> RowSimilarityJob in Item Similarity workflow does not pickup default similarity measure
> ---------------------------------------------------------------------------------------
>
>                 Key: MAHOUT-844
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-844
>             Project: Mahout
>          Issue Type: Bug
>          Components: Collaborative Filtering
>    Affects Versions: 0.5
>         Environment: Centos 5.5 64bit with CDH3u2 (Hadoop 0.20)
>            Reporter: Josh Patterson
>            Assignee: Sean Owen
>              Labels: patch
>             Fix For: 0.6
>
>   Original Estimate: 4h
>  Remaining Estimate: 4h
>
> If you omit the "-s" flag for running "mahout itemsimilarity ...." the following error
occurs after a bit:
> Exception in thread "main" java.lang.NullPointerException
> 	at java.lang.String.<init>(String.java:147)
> 	at org.apache.commons.cli2.commandline.Parser.parse(Parser.java:66)
> 	at org.apache.mahout.common.AbstractJob.parseArguments(AbstractJob.java:263)
> 	at org.apache.mahout.math.hadoop.similarity.RowSimilarityJob.run(RowSimilarityJob.java:103)
> 	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
> 	at org.apache.mahout.cf.taste.hadoop.similarity.item.ItemSimilarityJob.run(ItemSimilarityJob.java:199)
> 	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
> 	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79)
> 	at org.apache.mahout.cf.taste.hadoop.similarity.item.ItemSimilarityJob.main(ItemSimilarityJob.java:93)
> 	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.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:68)
> 	at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:139)
> 	at org.apache.mahout.driver.MahoutDriver.main(MahoutDriver.java:187)
> 	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.apache.hadoop.util.RunJar.main(RunJar.java:186)
> Adding back in the "-s" flag allows the job to complete. 

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