[jira] Created: (MAHOUT-353) java.lang.NullPointerException in RecommenderMapper

[Hui Wen Han (JIRA)]

java.lang.NullPointerException in RecommenderMapper
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                 Key: MAHOUT-353
                 URL: https://issues.apache.org/jira/browse/MAHOUT-353
             Project: Mahout
          Issue Type: Bug
          Components: Collaborative Filtering
    Affects Versions: 0.4
            Reporter: Hui Wen Han
             Fix For: 0.4


java.lang.NullPointerException
        at 
org.apache.mahout.cf.taste.hadoop.item.RecommenderMapper$CooccurrenceCache.get(RecommenderMapper.java:169)
        at 
org.apache.mahout.cf.taste.hadoop.item.RecommenderMapper$CooccurrenceCache.get(RecommenderMapper.java:154)
        at 
org.apache.mahout.cf.taste.impl.common.Cache.getAndCacheValue(Cache.java:125)
        at org.apache.mahout.cf.taste.impl.common.Cache.get(Cache.java:94)
        at 
org.apache.mahout.cf.taste.hadoop.item.RecommenderMapper.map(RecommenderMapper.java:111)
        at 
org.apache.mahout.cf.taste.hadoop.item.RecommenderMapper.map(RecommenderMapper.java:52)
        at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50)
        at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:358)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:307)
        at org.apache.hadoop.mapred.Child.main(Child.java:170)


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