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https://issues.apache.org/jira/browse/MAHOUT-1637?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Musselman updated MAHOUT-1637:
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Fix Version/s: (was: 0.10.0)
0.10.1
> RecommenderJob of ALS fails in the mapper because it 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
> Assignee: Andrew Musselman
> Labels: als, collaborative-filtering, legacy
> Fix For: 0.10.1
>
> Original Estimate: 4h
> Remaining Estimate: 4h
>
> 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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