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https://issues.apache.org/jira/browse/SYSTEMML-1616?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matthias Boehm resolved SYSTEMML-1616.
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Resolution: Fixed
Assignee: Matthias Boehm
Fix Version/s: SystemML 1.0
> 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 1.0
>
>
> 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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