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From "Matthias Boehm (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (SYSTEMML-2369) Incorrect nnz runtime propagation on codegen spark cell ops w/o agg
Date Sun, 17 Jun 2018 00:44:00 GMT

     [ https://issues.apache.org/jira/browse/SYSTEMML-2369?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Matthias Boehm closed SYSTEMML-2369.
------------------------------------
       Resolution: Fixed
         Assignee: Matthias Boehm
    Fix Version/s: SystemML 1.2

> Incorrect nnz runtime propagation on codegen spark cell ops w/o agg
> -------------------------------------------------------------------
>
>                 Key: SYSTEMML-2369
>                 URL: https://issues.apache.org/jira/browse/SYSTEMML-2369
>             Project: SystemML
>          Issue Type: Bug
>            Reporter: Matthias Boehm
>            Assignee: Matthias Boehm
>            Priority: Major
>             Fix For: SystemML 1.2
>
>
> The recent codegen compiler modification in SYSTEMML-2134 revealed a hidden issue where
spark codegen cell operations without aggregation wrongly propagated the number of non-zeros
of the main input into the output. This can lead to incorrect results if the main input is
empty but the cell operation is sparse-unsafe.



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