ALS Hadoop format Text

[Stuart Horsman]

Hi All,

I'm trying to print out the ratings predictions from the ALS-WR hadoop job
and have copied FactorizationEvaluator and have to PredictorEvaluator and
have updated the job to print out the ratings based on an input file.  The
final loop simply does:

  if (U.containsKey(userID) && M.containsKey(itemID)) {
     double estimate = U.get(userID).dot(M.get(itemID));
     String rating = userID + "," + itemID + "," + estimate;

     ctx.write(new Text(rating), NullWritable.get());
   }
however the output of the map job is not Text as what I was expecting, but
the following:

SEQ^F^Yorg.apache.hadoop.io.Text!org.apache.hadoop.io.NullWritable^@^@^@^@^@^@.ñÖ^E<9e>PA^E<9a>ânüÁ;,ï^@^@^@
^@^@^@
^_45882080,4298,3.448909581373436^@^@^@"^@^@^@"!70331108,12285,3.6083552170751596^@^@^@!^@^@^@!
53417379,15230,1.936937097038839^@^@^@ ^@^@^@
^_90607973,3785,4.690291927345934^@^@^@"^@^@^@"!46768202,23146,2.4260144690777854^@^@^@"^@^@^@"!53145456,14802,1.8729882859821854

Is there some other formatting step I need to do first before calling
ctx.write?

Thanks

Stuart