[jira] [Resolved] (SYSTEMML-749) Failed nrow call after spark removeEmpty operation

["Matthias Boehm (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SYSTEMML-749?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Matthias Boehm resolved SYSTEMML-749.
-------------------------------------
       Resolution: Fixed
    Fix Version/s: SystemML 0.11

> Failed nrow call after spark removeEmpty operation
> --------------------------------------------------
>
>                 Key: SYSTEMML-749
>                 URL: https://issues.apache.org/jira/browse/SYSTEMML-749
>             Project: SystemML
>          Issue Type: Bug
>          Components: Runtime
>    Affects Versions: SystemML 0.10
>            Reporter: Matthias Boehm
>            Assignee: Matthias Boehm
>             Fix For: SystemML 0.11
>
>
> In the special case of removeEmpty over a completely empty input matrix, the spark removeEmpty instruction creates an invalid output of dimensions [0 x ncol(in)] or [nrow(in) x 0] which is not supported in SystemML. Accordingly, any subsequent operation would have undefined behavior; in case of meta data operations like nrow or ncol, this actually leads to an explicit error with the following message: "Invalid meta data returned by nrow: 0".



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