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Posted to user@mahout.apache.org by beforest151 <be...@gmail.com> on 2013/03/15 10:02:38 UTC

Re: PFP Growth

I've encountered same issue recently, there's a good chance that this is an
data skew issue, as certain output keys of mapper contains huge values,
corresponding reducer might not able to aggregate the values correctly with
out of memory error. it can be solved by define the key precisely to avoid
skew.... 
Can you get the failed map/reduce process log via jobtracker?



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