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From Pat Ferrel <>
Subject Re: mahout spark-rowsimilarity error
Date Fri, 19 May 2017 16:20:06 GMT
Some ideas are left on the SO question

On May 18, 2017, at 6:14 PM, Daniel Gabrieli <> wrote:


I am trying to research potential features to feed into the Universal Recommendation engine
by using the mahout command line interface.  I can successfully run mahout spark-rowsimilarity
<> on up to
about 500 rows of data. After that I get the error below:

INFO DAGScheduler: Job 7 failed: saveAsTextFile at TextDelimitedReaderWriter.scala:294, took
1.110184 s
Exception in thread "main" org.apache.spark.SparkException: Job aborted due to stage failure:
Task 0 in stage 12.0 failed 1 times, most recent failure: Lost task 0.0 in stage 12.0 (TID
24, localhost): java.lang.IllegalArgumentException

I tried various cli options like below but get the same error:

mahout spark-rowsimilarity --maxObservations 500000 -sem 6g -ma "local[4]" --input items.csv
--output /tmp/output

Any suggestions would be most helpful.

I cross posted on Stack Overflow here <>


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