hi,
I have just started exploring the distributed version of mahout. I
wanted to start with running the example job as follows:
hadoop jar mahout-core-0.3.job
org.apache.mahout.cf.taste.hadoop.item.RecommenderJob --input
testdata/test.txt --output output --tempDir temp --jarFile
mahout-core-0.3.jar
but I couldn't find a parameter where I can specify the data set the
recommender will use. I assume this is the reason why the job fails:
10/05/02 18:40:15 INFO mapred.JobClient: Task Id :
attempt_201004291158_0018_m_000001_2, Status : FAILED
java.lang.ArrayIndexOutOfBoundsException: 1
at
org.apache.mahout.cf.taste.hadoop.item.ItemIDIndexMapper.map(ItemIDIndexMapper.java:42)
at
org.apache.mahout.cf.taste.hadoop.item.ItemIDIndexMapper.map(ItemIDIndexMapper.java:31)
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)
thanks
Tamas
