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Posted to dev@mahout.apache.org by "Andrew Palumbo (JIRA)" <ji...@apache.org> on 2015/03/18 16:18:39 UTC
[jira] [Commented] (MAHOUT-1638) H2O bindings fail at
drmParallelizeWithRowLabels(...)
[ https://issues.apache.org/jira/browse/MAHOUT-1638?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14367288#comment-14367288 ]
Andrew Palumbo commented on MAHOUT-1638:
----------------------------------------
As discussed on @dev yesterday, this seems to be a blocker for H2O. Is not a huge bug but does effect some core DrmLike capabilities.
> H2O bindings fail at drmParallelizeWithRowLabels(...)
> -----------------------------------------------------
>
> Key: MAHOUT-1638
> URL: https://issues.apache.org/jira/browse/MAHOUT-1638
> Project: Mahout
> Issue Type: Bug
> Affects Versions: 0.10.0
> Reporter: Andrew Palumbo
> Priority: Blocker
> Labels: DSL, h2o, scala
> Fix For: 1.0
>
>
> The H2OHelper.drmFromMatrix(...) function fails when trying to write row label String keys to a water.fvec.Vec.:
> {code:java}
> java.lang.IllegalArgumentException: Not a String
> at water.fvec.Chunk.set_impl(Chunk.java:507)
> at water.fvec.Chunk.set0(Chunk.java:469)
> at water.fvec.Chunk.set(Chunk.java:371)
> at water.fvec.Vec$Writer.set(Vec.java:803)
> at org.apache.mahout.h2obindings.H2OHelper.drmFromMatrix(H2OHelper.java:331)
> at org.apache.mahout.h2obindings.H2OEngine$.drmParallelizeWithRowLabels(H2OEngine.scala:83)
> at org.apache.mahout.math.drm.package$.drmParallelizeWithRowLabels(package.scala:67)
> {code}
> This causes an exception when calling drm.drmParallelizeWithRowLabels(...)
> To reproduce, apply [PR#72: Enable Naive Bayes Tests in h2o Module|https://github.com/apache/mahout/pull/72] and run:
> {code} $ mvn test
> {code}
> from the h2o module:
> {code:java}
> - NB Aggregator *** FAILED ***
> java.lang.IllegalArgumentException: Not a String
> at water.fvec.Chunk.set_impl(Chunk.java:507)
> at water.fvec.Chunk.set0(Chunk.java:469)
> at water.fvec.Chunk.set(Chunk.java:371)
> at water.fvec.Vec$Writer.set(Vec.java:803)
> at org.apache.mahout.h2obindings.H2OHelper.drmFromMatrix(H2OHelper.java:331)
> at org.apache.mahout.h2obindings.H2OEngine$.drmParallelizeWithRowLabels(H2OEngine.scala:83)
> at org.apache.mahout.math.drm.package$.drmParallelizeWithRowLabels(package.scala:67)
> at org.apache.mahout.classifier.naivebayes.NBTestBase$$anonfun$2.apply$mcV$sp(NBTestBase.scala:91)
> at org.apache.mahout.classifier.naivebayes.NBTestBase$$anonfun$2.apply(NBTestBase.scala:70)
> at org.apache.mahout.classifier.naivebayes.NBTestBase$$anonfun$2.apply(NBTestBase.scala:70)
> ...
> {code}
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