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From Sam Pullara <>
Subject Re: Sometimes empty results
Date Mon, 02 May 2011 18:01:27 GMT
Thanks for the push to really look closer. Turns out the key reversal I was doing in my code
was somewhat randomizing things... everything working great now.


On May 2, 2011, at 10:06 AM, Sean Owen wrote:

> I don't see any thing about the (Mahout) code that would have any
> randomness. Are you sure it's not coming from the other code? or some other
> strange issue with systems in between or something?
> On Mon, May 2, 2011 at 5:27 PM, Sam Pullara <> wrote:
>> Thanks for the reply Steven. Actually all the input is identical, the same
>> data, the same request for recommendations for the same user. Sometimes it
>> returns a set of results and sometimes it returns an empty list.
>> Sam
>> --
>> Nope, no randomness, the liklihood is that a recommendation cannot be made
>> for the user you are making a request for. You could use the random
>> recommender or just return the top 10 items from the dataset.

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