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https://issues.apache.org/jira/browse/MAHOUT-1934?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15850887#comment-15850887
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ASF GitHub Bot commented on MAHOUT-1934:
----------------------------------------

GitHub user andrewpalumbo opened a pull request:

    https://github.com/apache/mahout/pull/273

    MAHOUT-1934: OpenMP jars aren't being picked up 

    add in dependency-reduced.jar to put javacpp jars on executor classpath. 
Hack for now. use simple wildcard as well.

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/andrewpalumbo/mahout MAHOUT-1934b

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/mahout/pull/273.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #273
    
----
commit 892f570b879ccdedd59ad03eb6690da661b90f2c
Author: Andrew Palumbo <apalu...@apache.org>
Date:   2017-02-03T01:29:15Z

    MAHOUT-1934: OpenMP jars aren't being picked up add in 
dependency-reduced.jar to put javacpp jars on executor classpath. Hack for now.

----


> OpenMP jars aren't being picked up in distributed Spark
> -------------------------------------------------------
>
>                 Key: MAHOUT-1934
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1934
>             Project: Mahout
>          Issue Type: Improvement
>    Affects Versions: 0.13.0
>            Reporter: Trevor Grant
>            Assignee: Andrew Palumbo
>            Priority: Blocker
>             Fix For: 0.13.0
>
>
> When executing the following:
> ```
> import org.apache.mahout.math.decompositions._
> drmX.checkpoint() 
> val (U, V, s) = dspca(drmX, k = 30, q = 1)
> ```
> I see the following:
> ```
> import org.apache.mahout.math.decompositions._
> res1: org.apache.mahout.math.drm.CheckpointedDrm[Int] = 
> org.apache.mahout.sparkbindings.drm.CheckpointedDrmSpark@2e8dd198
> [INFO] Creating org.apache.mahout.viennacl.opencl.GPUMMul solver
> [WARN] Unable to create class GPUMMul: attempting OpenMP version
> [INFO] Creating org.apache.mahout.viennacl.openmp.OMPMMul solver
> org.apache.mahout.viennacl.openmp.OMPMMul$
> [INFO] Unable to create class OMPMMul: falling back to java version
> drmReduxX: org.apache.mahout.math.drm.DrmLike[Int] = 
> OpMapBlock(OpTimesRightMatrix(org.apache.mahout.s...
> ```
> The code executes fine, but it seems the OpenMP is not getting picked up.
> To be clear I build these jars with -Pviennacl-omp
> I the issue persists through other operations as well.  I am running on a 3 
> node Yarn cluster/ spark 1.6.3



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