Cristian Galán created MAHOUT-1637:
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Summary: RecommenderJob of ALS fails in the mapper because uses
the instance of other class
Key: MAHOUT-1637
URL: https://issues.apache.org/jira/browse/MAHOUT-1637
Project: Mahout
Issue Type: Bug
Components: Collaborative Filtering
Affects Versions: 0.9
Reporter: Cristian Galán
Fix For: 1.0
In the map method of PredictionMapper when executes the next line:
Pair<OpenIntObjectHashMap<Vector>, OpenIntObjectHashMap<Vector>> uAndM =
getSharedInstance();
the job fail because obtains the instance of other class. This occurs because I
launch a local job, so the instance exists previously and for this doesn't make
the new correct instance for ALS.
The solution that it works me is to add the next line:.
SharingMapper.reset();
in method run of JobRecommender of org.apache.mahout.cf.taste.hadoop.als
package
I have to test it in my environment with distributed mapreduce, hadoop fs,
zookeeper and others if it works correctly.
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