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From Sebastian Schelter <>
Subject Re:
Date Thu, 18 Nov 2010 10:24:36 GMT
Hi Alan,

can you try to specify the full path to the input directory? You should 
also be able to omit the full classname and use bin/mahout 
recommenditembased instead.

You could also try to manually start the hadoop job like this:

hadoop jar<path_to_job-jar> --output
useroutput -n 10 --usersFile users_test.txt -s SIMILARITY_PEARSON_CORRELATION --input userdata/


On 18.11.2010 11:16, Alan Said wrote:
> Hi all,
> While trying to run the example from
> With the following command
> bin/mahout --output useroutput
-n 10 --usersFile users_test.txt -s SIMILARITY_PEARSON_CORRELATION --input userdata/
> I keep getting this error:
> Exception in thread "main" org.apache.hadoop.mapreduce.lib.input.InvalidInputException:
Input path does not exist: userdata/
> I've tried all kinds of path combinations, still same error.
> Another weird thing is if I put --input userdata/ as the first argument I get
> Unexpected usage:<command>  [Generic Options] [Job-Specific Options]
> I'm obviously missing something, so any help would be appreciated.
> /Alan

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