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https://issues.apache.org/jira/browse/SPARK-16372?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xusen Yin updated SPARK-16372:
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Summary: Retag RDD to tallSkinnyQR of RowMatrix (was: RowMatrix
constructor should use retag for Java compatibility)
> Retag RDD to tallSkinnyQR of RowMatrix
> --------------------------------------
>
> Key: SPARK-16372
> URL: https://issues.apache.org/jira/browse/SPARK-16372
> Project: Spark
> Issue Type: Bug
> Components: MLlib
> Reporter: Xusen Yin
> Priority: Minor
>
> The following Java code because of type erasing:
> {code}
> JavaRDD<Vector> rows = jsc.parallelize(...);
> RowMatrix mat = new RowMatrix(rows.rdd());
> QRDecomposition<RowMatrix, Matrix> result = mat.tallSkinnyQR(true);
> {code}
> We should use retag to restore the type to prevent the following exception:
> {code}
> java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to
> [Lorg.apache.spark.mllib.linalg.Vector;
> {code}
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