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From go canal <>
Subject Re: Exception in thread "main" java.lang.IllegalArgumentException: Unable to read output from "mahout -spark classpath"
Date Wed, 07 Oct 2015 04:12:42 GMT
thank you Pat. I was having that issue when I was trying to do something like that. 
Just curious, how should I prepare the data so that it can satisfy drmDfsRead (path) ? DRM
format and how to create the DRM file ? thanks, canal 

     On Wednesday, October 7, 2015 4:09 AM, Pat Ferrel <> wrote:

 Linear algebra stuff is what Mahout Samsara is all about. For these docs in-core means in-memory
and out of core means distributed

On Oct 4, 2015, at 7:27 PM, go canal <> wrote:

Thank you very much for the help. I will try Spark 1.4. 
I would like to try distributed matrix multiplication. not sure if there are sample codes
available. I am very new to this stack. thanks, canal 

    On Monday, October 5, 2015 12:23 AM, Pat Ferrel <> wrote:

Mahout 0.11.0 is built on Spark 1.4 and so 1.5.1 is a bit unknown. I think the Mahout Shell
does not run on 1.5.1.

That may not be the error below, which is caused when Mahout tries to create a set of jars
to use in the Spark executors. The code runs `mahout -spark classpath` to get these. So something
is missing in your env in Eclipse. Does `mahout -spark classpath` run in a shell, if so check
to see if you env matches in Eclipse.

Also what are you trying to do? I have some example Spark Context creation code if you are
using Mahout as a Library.

On Oct 3, 2015, at 2:14 AM, go canal <> wrote:

Hello,I am running a very simple Mahout application in Eclipse, but got this error:
Exception in thread "main" java.lang.IllegalArgumentException: Unable to read output from
"mahout -spark classpath". Is SPARK_HOME defined?
I have SPARK_HOME defined in Eclipse as an environment variable with value of /usr/local/spark-1.5.1.
What else I need to include/set ?

thanks, canal

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