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From Peter Andrews <>
Subject term collocation from lucene index
Date Fri, 10 Jun 2011 21:03:11 GMT

I just started using Mahout a few or two ago and so far its been pretty
good. I working on some term collocation and while I have been working from
a directory of files, I want to switch to using lucene indexes as that is
the format the files are already in. I am trying to use the lucene.vector to
turn the indexes into vector and then use
org.apache.mahout.vectorizer.collocations.llr.CollocDriver to generate the
collocations and LLRs. I keep getting this error when I run CollocDriver,
any ideas?

java.lang.ClassCastException: cannot be
cast to
at org.apache.hadoop.mapred.MapTask.runNewMapper(
at org.apache.hadoop.mapred.Child$
at Method)
at org.apache.hadoop.mapred.Child.main(

Peter Andrews

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