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https://issues.apache.org/jira/browse/SYSTEMML-774?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Nakul Jindal resolved SYSTEMML-774.
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Resolution: Fixed
Assignee: Nakul Jindal
Fix Version/s: SystemML 0.11
Fixed by [PR 186|https://github.com/apache/incubator-systemml/pull/186]
> No check from LibMatrixDataGen for thread safe SparseBlock
> ----------------------------------------------------------
>
> Key: SYSTEMML-774
> URL: https://issues.apache.org/jira/browse/SYSTEMML-774
> Project: SystemML
> Issue Type: Bug
> Components: Runtime
> Reporter: Nakul Jindal
> Assignee: Nakul Jindal
> Fix For: SystemML 0.11
>
>
> The SparseBlock implementations {{SparseBlockCSR}} and {{SparseBlockCOO}} are
> not thread safe.
> When {{MatrixBlock.DEFAULT_SPARSEBLOCK}} is set to {{SparseBlock.Type.CSR}},
> and a {{rand()}} method from DML is used to create a sparse matrix, like so:
> {{X = rand(rows=200, cols=10000, min=0, max=4, pdf="uniform", sparsity=0.3)}}
> It crashes because {{LibMatrixDatagen.generateRandomMatrix(MatrixBlock,
> RandomMatrixGenerator, long[], Well1024a, long, int )}} does not check if the
> underlying SparseBlock implementation {{isThreadSafe}}.
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