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https://issues.apache.org/jira/browse/MAHOUT-1939?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15862045#comment-15862045
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Dmitriy Lyubimov edited comment on MAHOUT-1939 at 2/11/17 12:16 AM:
--------------------------------------------------------------------
perhaps mahout should include fast-util in a shaded form in mahout-math or
mahout-math-scala.
like this (in mahout-math):
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.0.0</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<relocations>
<relocation>
<pattern>it.unimi.dsi.fastutil</pattern>
<shadedPattern>shaded.it.unimi.dsi.fastutil</shadedPattern>
</relocation>
</relocations>
</configuration>
</execution>
</executions>
</plugin>
was (Author: dlyubimov):
perhaps mahout should include fast-util in a shaded form in mahout-math or
mahout-math-scala.
> fastutil version clash with spark distributions
> -----------------------------------------------
>
> Key: MAHOUT-1939
> URL: https://issues.apache.org/jira/browse/MAHOUT-1939
> Project: Mahout
> Issue Type: Bug
> Reporter: Dmitriy Lyubimov
> Priority: Critical
>
> Version difference in fast util breaks sparse algebra (specifically,
> RandomAccessSparseVector in assign, e.g., vec *= 5).
> observed version in CDH:
>
> file:/opt/cloudera/parcels/CDH-5.9.0-1.cdh5.9.0.p0.21/jars/fastutil-6.3.jar
> mahout uses 7.0.12
> java.lang.UnsupportedOperationException
> at
> it.unimi.dsi.fastutil.ints.AbstractInt2DoubleMap$BasicEntry.setValue(AbstractInt2DoubleMap.java:146)
> at
> org.apache.mahout.math.RandomAccessSparseVector$RandomAccessElement.set(RandomAccessSparseVector.java:235)
> at
> org.apache.mahout.math.VectorView$DecoratorElement.set(VectorView.java:181)
> at
> org.apache.mahout.math.AbstractVector.assign(AbstractVector.java:536)
> at
> org.apache.mahout.math.scalabindings.RLikeVectorOps.$div$eq(RLikeVectorOps.scala:45)
> ...
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