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Hui Wen Han commented on MAHOUT-358: ------------------------------------ the simple way to resolve the issue is that construct the output in RecommenderMapper and not use custom writable private final Text user = new Text(); private final Text recomScore = new Text(); StringBuilder result = new StringBuilder(200); result.append('['); boolean first = true; for (RecommendedItem item : recommendations) { if (first) { first = false; } else { result.append(','); } result.append(item.getItemID()); result.append(':'); result.append(item.getValue()); } result.append(']'); user.set(String.valueOf(userID)); recomScore.set(result.toString); output.collect(userID, recomScore); > the pref value field of output of > org.apache.mahout.cf.taste.hadoop.item.RecommenderJob has negative > ----------------------------------------------------------------------------------------------------- > > Key: MAHOUT-358 > URL: https://issues.apache.org/jira/browse/MAHOUT-358 > Project: Mahout > Issue Type: Test > Components: Collaborative Filtering > Affects Versions: 0.4 > Reporter: Hui Wen Han > Attachments: 20100407_steer_item_out_part-00000, > attempt_201004011623_0070_m_000000_0.htm, screenshot-1.jpg, screenshot-2.jpg > > > In my test the input pref values all is positive. > the output score value has negative value , -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.