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From Tobias Pfeiffer <>
Subject Re: Classpath errors with Breeze
Date Mon, 09 Jun 2014 05:03:11 GMT

I had a similar problem; I was using `sbt assembly` to build a jar
containing all my dependencies, but since my file system has a problem
with long file names (due to disk encryption), some class files (which
correspond to functions in Scala) where not included in the jar I
uploaded. Although, thinking about it, that would result in a
ClassNotFound exception, not NoSuchMethod. Have you built your code
against a different version of the library than the jar you use in


On Mon, Jun 9, 2014 at 1:52 PM, dlaw <> wrote:
> I'm having some trouble getting a basic matrix multiply to work with Breeze.
> I'm pretty sure it's related to my classpath. My setup is a cluster on AWS
> with 8 m3.xlarges. To create the cluster I used the provided ec2 scripts and
> Spark 1.0.0.
> I've made a gist with the relevant pieces of my app:
> The app was created as detailed in the quick start guide.
> When I run it I get an error that says the method to multiply a dense matrix
> by a dense matrix does not exist:
> 14/06/09 04:49:09 WARN scheduler.TaskSetManager: Lost TID 90 (task 0.0:13)
> 14/06/09 04:49:09 INFO scheduler.TaskSetManager: Loss was due to
> java.lang.NoSuchMethodError:
> breeze.linalg.DenseMatrix$.implOpMulMatrix_DMD_DMD_eq_DMD()Lbreeze/linalg/operators/DenseMatrixMultiplyStuff$implOpMulMatrix_DMD_DMD_eq_DMD$;
> [duplicate 46]
> I've tried a bunch of different things, including playing with the CLASSPATH
> and ADD_JARS environment variables, the --jars option on spark-submit, the
> version of breeze and scala, etc...
> I've also tried it in the spark-shell. It works there, so I don't really
> know what's going on. Any thoughts?
> --
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