Hi Rafal, can you issue a ticket for this problem at https://issues.apache.org/jira/browse/MAHOUT ? We have unit-tests that check whether this happens and currently they work fine. I can only imagine that the problem occurs in larger datasets where we sample the data in some places. Can you describe a scenario/dataset where this happens?
Best, Sebastian 2013/7/30 Rafal Lukawiecki <ra...@projectbotticelli.com> > I'm new here, just registered. Many thanks to everyone for working on an > amazing piece of software, thank you for building Mahout and for your > support. My apologies if this is not the right place to ask the question—I > have searched for the issue, and I can see this problem has been reported > here: > http://stackoverflow.com/questions/13822455/apache-mahout-distributed-recommender-recommends-already-rated-items > > Unfortunately, the trail leads to the newsgroups, and I have not found a > way, yet, to get an answer from them, without asking you. > > Essentially, I am running a Hadoop RecommenderJob from Mahout 0.7, and I > am finding that it is recommending items that the user has already > expressed a preference for in their input file. I understand that this > should not be happening, and I am not sure if there is a know fix or if I > should be looking for a workaround (such as using the entire input as the > filterFile). > > I will double-check that there is no error on my side, but so far it does > not seem that way. > > Many thanks and my regards from Ireland, > Rafal Lukawiecki > > -- > > Rafal Lukawiecki > > Strategic Consultant and Director > > Project Botticelli Ltd > >
