Matthias Boehm created SYSTEMML-1616:
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Summary: 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
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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