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From Ted Dunning <>
Subject Re: Running algorithms from within java program
Date Fri, 04 Feb 2011 23:40:39 GMT
Aside from your issues that you describe I would suggest moving to 0.4 or
even trunk.  A LOT of improvements have happened.

On Fri, Feb 4, 2011 at 3:36 PM, Quiroz Hernandez, Andres <> wrote:

> Hello,
> I have set up a release version (pre-compiled) of Mahout 0.3 on top of a
> hadoop cluster with version 0.20.2 and am able to run mahout algorithms
> from the command line without a problem, e.g.:
> mahout seq2sparse -i input_dir -o output_dir -wt tf -seq
> However, I tried invoking the algorithms within a java program using the
> MahoutDriver class in the following way:
> MahoutDriver.main(args);
> Where args = {"seq2sparse", "-i", "input_dir", "-o", "output_dir",
> "-wt", "tf", "-seq"}
> This call fails with the message:
> 11/02/04 18:20:58 ERROR driver.MahoutDriver: MahoutDriver failed with
> args: [seq2sparse, -i, input_dir, -o, output_dir, -wt, tf, -seq]
> I believe that the problem is that I am not passing all of the jar
> dependencies that the mahout driver class needs to run the algorithm,
> and that this is taken care of by the mahout run script, but I am not
> very familiar with shell scripting and cannot tell exactly how that is
> taken care of. If I am correct, please let me know how I can include
> those dependencies (all of which I assume are in the $MAHOUT_HOME/lib
> folder), either in the arguments or otherwise. If not, please let me
> know what is the correct way to start the algorithms from the code.
> I also tried using the SparseVectorsFromSequenceFiles class (or any
> other algorithm driver class) directly with the corresponding arguments
> except for the short name (seq2sparse), and that call fails more
> explicitly with a ClassNotFoundException (which is why I concluded
> dependencies are the problem).
> Thank you for your help,
> Andres

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