Mark Bittmann created SPARK-5656:
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Summary: NegativeArraySizeException in
EigenValueDecomposition.symmetricEigs for large n and/or large k
Key: SPARK-5656
URL: https://issues.apache.org/jira/browse/SPARK-5656
Project: Spark
Issue Type: Bug
Components: MLlib
Reporter: Mark Bittmann
Priority: Minor
Large values of n or k in EigenValueDecomposition.symmetricEigs will fail with
a NegativeArraySizeException. Specifically, this occurs when 2*n*k >
Integer.MAX_VALUE. These values are currently unchecked and allow for the array
to be initialized to a value greater than Integer.MAX_VALUE. I have written the
below 'require' to fail this condition gracefully. I will submit a pull
request.
require(ncv * n < Integer.MAX_VALUE, "Product of 2*k*n must be smaller than " +
s"Integer.MAX_VALUE. Found required eigenvalues k = $k and matrix
dimension n = $n")
Here is the exception that occurs from computeSVD with large k and/or n:
Exception in thread "main" java.lang.NegativeArraySizeException
at
org.apache.spark.mllib.linalg.EigenValueDecomposition$.symmetricEigs(EigenValueDecomposition.scala:85)
at
org.apache.spark.mllib.linalg.distributed.RowMatrix.computeSVD(RowMatrix.scala:258)
at
org.apache.spark.mllib.linalg.distributed.RowMatrix.computeSVD(RowMatrix.scala:190)
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