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https://issues.apache.org/jira/browse/MAHOUT-1563?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14383150#comment-14383150
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Suneel Marthi commented on MAHOUT-1563:
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Andrew, this can be definitely fixed for 0.10.0
> Clean up WARNINGs during build
> ------------------------------
>
> Key: MAHOUT-1563
> URL: https://issues.apache.org/jira/browse/MAHOUT-1563
> Project: Mahout
> Issue Type: Bug
> Components: build
> Affects Versions: 0.9
> Reporter: Andrew Musselman
> Assignee: Andrew Musselman
> Priority: Minor
> Labels: DSL, scala
> Fix For: 0.10.0
>
>
> We need to clean up warnings in the maven logs. They seem to have piled up
> recently; some are about scala lib version conflicts, some are about
> deprecated APIs, some are about code style.
> Some may be fine for now but extra warnings in build logs feels like bad
> hygiene to me.
> Some examples:
> [WARNING] Expected all dependencies to require Scala version: 2.10.3
> [WARNING] com.twitter:chill_2.10:0.3.1 requires scala version: 2.10.0
> [WARNING] Multiple versions of scala libraries detected!
> [WARNING]
> /home/akm/mahout/spark/src/main/scala/org/apache/mahout/sparkbindings/drm/CheckpointedDrmBase.scala:73:
> warning: a pure expression does nothing in statement position; you may be
> omitting necessary parentheses
> [INFO] this
> [WARNING] Expected all dependencies to require Scala version: 2.10.3
> [WARNING] org.apache.mahout:mahout-math-scala:1.0-SNAPSHOT requires scala
> version: 2.10.3
> [WARNING] org.scalatest:scalatest_2.10:2.0 requires scala version: 2.10.0
> [WARNING] Multiple versions of scala libraries detected!
> [WARNING]
> /home/akm/mahout/math-scala/src/main/scala/org/apache/mahout/math/scalabindings/package.scala:132:
> warning: non-variable type argument Double in type pattern Iterable[Double]
> is unchecked since it is eliminated by erasure
> [INFO] case t: Iterable[Double] => t.toArray
> [WARNING]
> /home/akm/mahout/examples/src/main/java/org/apache/mahout/clustering/syntheticcontrol/kmeans/Job.java:
> Some input files use or override a deprecated API.
> [WARNING]
> /home/akm/mahout/examples/src/main/java/org/apache/mahout/clustering/syntheticcontrol/kmeans/Job.java:
> Recompile with -Xlint:deprecation for details.
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