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From jamborta <jambo...@gmail.com>
Subject Re: Running mahout on hadoop
Date Tue, 20 Oct 2009 18:47:24 GMT

thanks. I saw there is a new version on svd. did you manage to solve the
problem?



srowen wrote:
> 
> Yeah you see the same problem I do. If you use the Hadoop 0.20 API here it
> fails because something in Hadoop expects 0.19 APIs. Seems like a bug and
> I
> am waiting on a fix.
> The other error sound like a Hadoop version mismatch.
> 
> It remains required to pass in a list of user ID to recommend for as
> input,
> yes.
> 
> On Oct 15, 2009 10:27 AM, "jamborta" <jamborta@gmail.com> wrote:
> 
> 
> thanks. I tried to run it. I have two places to run it. my desktop where I
> installed hadoop. it gives me this error:
> 
> Exception in thread "main" java.lang.RuntimeException:
> java.lang.RuntimeException: class
> org.apache.hadoop.mapreduce.lib.output.TextOutputFormat not
> org.apache.hadoop.mapred.OutputFormat
> 
> and we have a server running where it gives me another error (I guess this
> one is becuase this hadoop is an older version 0.18):
> 
> java.lang.NoSuchMethodError:
> org.apache.hadoop.mapred.JobConf.setBooleanIfUnset(Ljava/lang/String;Z)V
>        at org.apache.hadoop.mapreduce.Job.setUseNewAPI(Job.java:388)
> 
> this is what I used to run it:
> 
> hadoop-0.20.1/bin/hadoop jar data/mahout-examples-0.2-SNAPSHOT.job
> org.apache.mahout.cf.taste.hadoop.RecommenderJob -r
> org.apache.mahout.cf.taste.impl.recommender.slopeone.SlopeOneRecommender
> -n
> 10 -m data/data/all_data.data -f data/data/all_data.data -o /output
> 
> I'm not sure about what I should put for userIdFile because userids are
> already in the dataModelFile, at least that's how your input worked
> before.
> 
> thanks a lot for your help,
> 
> Tamas
> 
> 
> 
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> 
> Sent from the Mahout User List mailing list archive at Nabble.com.
> 
> 

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