[jboss-jira] [JBoss JIRA] (JBRULES-3718) java.lang.NullPointerException at org.mvel2.ast.IntSub.getReducedValueAccelerated

[Michiel Vermandel (JIRA)]

Michiel Vermandel created JBRULES-3718:
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             Summary: java.lang.NullPointerException at org.mvel2.ast.IntSub.getReducedValueAccelerated
                 Key: JBRULES-3718
                 URL: https://issues.jboss.org/browse/JBRULES-3718
             Project: JBRULES
          Issue Type: Bug
      Security Level: Public (Everyone can see)
          Components: drools-core
    Affects Versions: 5.5.0.Final
         Environment: Windows 7 64bit -  Java 1.7.0 
Drools-planner 5.5.0.Final
 -> Drools-core 5.5.0.Final 
 -> mvel2 2.1.3.Final
            Reporter: Michiel Vermandel
            Assignee: Mark Proctor


When I run my planning I get now and then the stacktrace as mentioned below.
It happens about 1 in 5 times during running a JUnit test on small amount of planning entities and problem facts.

It started after adding my last rule:

rule "tasksInSameCommunityMustBeChained"
    when
        $lead : Task(this==lead, period!=null, communityId!= null, $communityId : communityId)
        not ( Task(this==lead, communityId == $communityId, id != $lead.id, ($lead.startPeriodId-1) <= endPeriodId && ($lead.endPeriodId+1) >= startPeriodId ) )
    then
        insertLogical(new IntConstraintOccurrence("tasksInSameCommunityMustBeChained", ConstraintType.NEGATIVE_HARD, Importance.chainedPeriod, $communityId, $lead, $lead.getStartPeriodId()));
end 

Stack trace: 

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)

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