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https://issues.apache.org/jira/browse/SPARK-15922?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15327884#comment-15327884
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Dongjoon Hyun commented on SPARK-15922:
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Hi, [~chaz2505].
This is due to `toIndexedRowMatrix` bug.
I'll make a PR for this.
> BlockMatrix to IndexedRowMatrix throws an error
> -----------------------------------------------
>
> Key: SPARK-15922
> URL: https://issues.apache.org/jira/browse/SPARK-15922
> Project: Spark
> Issue Type: Bug
> Components: MLlib
> Affects Versions: 2.0.0
> Reporter: Charlie Evans
>
> {code}
> import org.apache.spark.mllib.linalg.distributed._
> import org.apache.spark.mllib.linalg._
> val rows = IndexedRow(0L, new DenseVector(Array(1,2,3))) :: IndexedRow(1L,
> new DenseVector(Array(1,2,3))):: IndexedRow(2L, new
> DenseVector(Array(1,2,3))):: Nil
> val rdd = sc.parallelize(rows)
> val matrix = new IndexedRowMatrix(rdd, 3, 3)
> val bmat = matrix.toBlockMatrix
> val imat = bmat.toIndexedRowMatrix
> imat.rows.collect // this throws an error - Caused by:
> java.lang.IllegalArgumentException: requirement failed: Vectors must be the
> same length!
> {code}
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