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From "Glenn Weidner (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SYSTEMML-1616) Multi-threaded JMLC failures due to side effects of constant folding
Date Sat, 09 Sep 2017 01:17:00 GMT

     [ https://issues.apache.org/jira/browse/SYSTEMML-1616?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Glenn Weidner updated SYSTEMML-1616:
------------------------------------
    Fix Version/s:     (was: SystemML 1.0)
                   SystemML 0.15

> Multi-threaded JMLC failures due to side effects of constant folding
> --------------------------------------------------------------------
>
>                 Key: SYSTEMML-1616
>                 URL: https://issues.apache.org/jira/browse/SYSTEMML-1616
>             Project: SystemML
>          Issue Type: Bug
>            Reporter: Matthias Boehm
>            Assignee: Matthias Boehm
>             Fix For: SystemML 0.15
>
>
> In scenarios with multiple concurrently running JMLC connections and prepared scripts
per JVM process (e.g., in spark executors, or multi-threaded containers), there are potential
side effects between scripts which ultimately can lead to compilation and runtime errors.
> The root cause are static reuse objects (for program block and execution context) in
the constant folding rewrite. Accordingly, folded constants might leak from one script compilation
into another script compilation which can cause all sorts of incomprehensible errors.



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