Op 16-01-13 14:10, Michiel Vermandel schreef:
Hi,

I will.
Should I file it again under https://issues.jboss.org/browse/JBRULES in component drools-planner ?
Component drools-core (or something more applicable even).
Mario Fusco is our mvel expert.
Hopefully he can understand the problem by looking at the stacktrace and rule, otherwise you'll need to look at reproducing the issue with a unit test (with no planner code).

Regards,

Michiel

 
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From: Geoffrey De Smet <ge0ffrey.spam@gmail.com>
To: Rules Users List <rules-users@lists.jboss.org>
Sent: Wednesday, January 16, 2013 10:51 AM
Subject: Re: [rules-users] NullPointerException at org.mvel2.ast.IntSub.getReducedValueAccelerated

The DRL uses mvel under the covers.

Looks like a bug in mvel, possibly in the JIT compilation (which could explain the 1 out of 5 runs behaviour).
File an issue in our jira: include the stacktrace, versions of drools-core and the mvel jar
and - if possible - the rule to which it applies.

Op 16-01-13 09:59, Michiel Vermandel schreef:
Hi,

When starting the planning solver I sometimes get the error as listed beneath.
I think it happens about 1 out of 5 runs.
It doesn't seem to have much influence on the solving process as everything continues normally (I think).
I do not use any mvel expressions to my knowledge.

Anyway, it would be nice to understand why this happens and how to get this resolved.

Exception in thread "Thread-1" java.lang.NullPointerException
    at org.mvel2.ast.IntSub.getReducedValueAccelerated(IntSub.java:17)
    at org.mvel2.compiler.ExecutableAccessor.getValue(ExecutableAccessor.java:38)
    at org.mvel2.ast.Substatement.getReducedValueAccelerated(Substatement.java:44)
    at org.mvel2.ast.BinaryOperation.getReducedValueAccelerated(BinaryOperation.java:108)
    at org.mvel2.ast.And.getReducedValueAccelerated(And.java:34)
    at org.mvel2.MVELRuntime.execute(MVELRuntime.java:85)
    at org.mvel2.compiler.CompiledExpression.getDirectValue(CompiledExpression.java:123)
    at org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:119)
    at org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:113)
    at org.mvel2.MVEL.executeExpression(MVEL.java:930)
    at org.drools.rule.constraint.MvelConditionEvaluator.evaluate(MvelConditionEvaluator.java:70)
    at org.drools.rule.constraint.MvelConditionEvaluator.ensureBranchEvaluation(MvelConditionEvaluator.java:117)
    at org.drools.rule.constraint.MvelConditionEvaluator.ensureCompleteEvaluation(MvelConditionEvaluator.java:102)
    at org.drools.rule.constraint.MvelConditionEvaluator.ensureCompleteEvaluation(MvelConditionEvaluator.java:90)
    at org.drools.rule.constraint.MvelConditionEvaluator.getAnalyzedCondition(MvelConditionEvaluator.java:82)
    at org.drools.rule.constraint.MvelConstraint.executeJitting(MvelConstraint.java:270)
    at org.drools.rule.constraint.MvelConstraint.access$200(MvelConstraint.java:51)
    at org.drools.rule.constraint.MvelConstraint$ConditionJitter.run(MvelConstraint.java:250)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
 
Thanks,

Michiel
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