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https://issues.apache.org/jira/browse/SYSTEMML-1035?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15573393#comment-15573393
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Glenn Weidner edited comment on SYSTEMML-1035 at 10/13/16 10:25 PM:
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The failures in DataFrameVectorScriptTest and 
DataFrameVectorFrameConversionTest occur when calling df.first() at 
FrameRDDConverterUtils.dataFrameToBinaryBlock(FrameRDDConverterUtils.java:352).

The failures in MLContextTest occur when calling tmp.count() at 
RDDConverterUtils.java:290 where tmp is JavaRDD<Row>.


was (Author: gweidner):
The failures in DataFrameVectorScriptTest and 
DataFrameVectorFrameConversionTest occur when calling <code>df.first()</code> 
at 
FrameRDDConverterUtils.dataFrameToBinaryBlock(FrameRDDConverterUtils.java:352).

The failures in MLContextTest occur when calling <code>tmp.count()</code> at 
RDDConverterUtils.java:290 where tmp is JavaRDD<Row>.

> ClassCastException's in unit tests
> ----------------------------------
>
>                 Key: SYSTEMML-1035
>                 URL: https://issues.apache.org/jira/browse/SYSTEMML-1035
>             Project: SystemML
>          Issue Type: Sub-task
>          Components: Runtime, Test
>            Reporter: Glenn Weidner
>
> Failures occurred in DataFrameVectorScriptTest, 
> DataFrameVectorFrameConversionTest, MLContextFrameTest, and MLContextTest due 
> to ClassCastException.
> Common example:
> java.lang.RuntimeException: java.lang.ClassCastException: java.lang.Integer 
> cannot be cast to java.lang.Double
> originating in:
> org.apache.spark.sql.catalyst
> triggered from:
> org.apache.sysml.runtime.instructions.spark.utils.FrameRDDConverterUtils.dataFrameToBinaryBlock(FrameRDDConverterUtils.java:352)
> To reproduce, change pom.xml spark.version to 1.6.2 and run either of the 
> four failing test suites.



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