[jboss-jira] [JBoss JIRA] (DROOLS-20) Compilation exception gets eaten by MVEL

[Geoffrey De Smet (JIRA)]

Geoffrey De Smet created DROOLS-20:
--------------------------------------

             Summary: Compilation exception gets eaten by MVEL
                 Key: DROOLS-20
                 URL: https://issues.jboss.org/browse/DROOLS-20
             Project: Drools
          Issue Type: Feature Request
      Security Level: Public (Everyone can see)
            Reporter: Geoffrey De Smet
            Assignee: Mario Fusco
            Priority: Critical


To reproduce:
- open planner, run the CloudBalancingApp, load a dataset and click button solve. This will work.
- Now open drools-planner-examples/src/main/resources/org/drools/planner/examples/cloudbalancing/solver/cloudBalancingScoreRules.drl
- At line 114, change 
{code}
IntConstraintOccurrence(constraintType = ...
{code}
into
{code}
IntConstraintOccurrence(ConstraintType = ...
{code}
(so change only the case of the first letter of constraintType
- Run the CloudBalancingApp, load a dataset and click button solve. It will fail with this exception (which is not the real exception):

{code}
org.kie.runtime.rule.ConsequenceException: Exception executing consequence for rule "computerCost" in org.drools.planner.examples.cloudbalancing.solver: java.lang.NullPointerException
	at org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39) ~[drools-core-6.0.0-SNAPSHOT.jar:6.0.0-SNAPSHOT]
...
Caused by: java.lang.NullPointerException: null
	at java.lang.String.<init>(String.java:168) ~[na:1.7.0_09]
	at org.mvel2.util.ErrorUtil.rewriteIfNeeded(ErrorUtil.java:12) ~[mvel2-2.1.3.Final.jar:na]
	at org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:302) ~[mvel2-2.1.3.Final.jar:na]
	at org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:62) ~[mvel2-2.1.3.Final.jar:na]
	at org.mvel2.MVEL.compileExpression(MVEL.java:810) ~[mvel2-2.1.3.Final.jar:na]
	at org.drools.base.mvel.MVELCompilationUnit.compile(MVELCompilationUnit.java:435) ~[drools-core-6.0.0-SNAPSHOT.jar:6.0.0-SNAPSHOT]
	at org.drools.base.mvel.MVELCompilationUnit.getCompiledExpression(MVELCompilationUnit.java:238) ~[drools-core-6.0.0-SNAPSHOT.jar:6.0.0-SNAPSHOT]
	at org.drools.rule.constraint.MvelConstraint.createMvelConditionEvaluator(MvelConstraint.java:205) ~[drools-core-6.0.0-SNAPSHOT.jar:6.0.0-SNAPSHOT]
	at org.drools.rule.constraint.MvelConstraint.evaluate(MvelConstraint.java:189) ~[drools-core-6.0.0-SNAPSHOT.jar:6.0.0-SNAPSHOT]
	at org.drools.rule.constraint.MvelConstraint.isAllowed(MvelConstraint.java:156) ~[drools-core-6.0.0-SNAPSHOT.jar:6.0.0-SNAPSHOT]
	at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:143) ~[drools-core-6.0.0-SNAPSHOT.jar:6.0.0-SNAPSHOT]
	at org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:498) ~[drools-core-6.0.0-SNAPSHOT.jar:6.0.0-SNAPSHOT]
	at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:383) ~[drools-core-6.0.0-SNAPSHOT.jar:6.0.0-SNAPSHOT]
	at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:232) ~[drools-core-6.0.0-SNAPSHOT.jar:6.0.0-SNAPSHOT]
	at org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:244) ~[drools-core-6.0.0-SNAPSHOT.jar:6.0.0-SNAPSHOT]
	at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:352) ~[drools-core-6.0.0-SNAPSHOT.jar:6.0.0-SNAPSHOT]
	at org.drools.beliefsystem.simple.SimpleBeliefSystem.insert(SimpleBeliefSystem.java:49) ~[drools-core-6.0.0-SNAPSHOT.jar:6.0.0-SNAPSHOT]
	at org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:150) ~[drools-core-6.0.0-SNAPSHOT.jar:6.0.0-SNAPSHOT]
	at org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:121) ~[drools-core-6.0.0-SNAPSHOT.jar:6.0.0-SNAPSHOT]
	at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:227) ~[drools-core-6.0.0-SNAPSHOT.jar:6.0.0-SNAPSHOT]
	at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:822) ~[drools-core-6.0.0-SNAPSHOT.jar:6.0.0-SNAPSHOT]
	at org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:255) ~[drools-core-6.0.0-SNAPSHOT.jar:6.0.0-SNAPSHOT]
	at org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:220) ~[drools-core-6.0.0-SNAPSHOT.jar:6.0.0-SNAPSHOT]
	at org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:215) ~[drools-core-6.0.0-SNAPSHOT.jar:6.0.0-SNAPSHOT]
	at org.drools.planner.examples.cloudbalancing.solver.Rule_computerCost_eb2dbb0704b64ca3a554fbda80ff54ab.defaultConsequence(Rule_computerCost_eb2dbb0704b64ca3a554fbda80ff54ab.java:7) ~[na:na]
	at org.drools.planner.examples.cloudbalancing.solver.Rule_computerCost_eb2dbb0704b64ca3a554fbda80ff54abDefaultConsequenceInvokerGenerated.evaluate(Unknown Source) ~[na:na]
	at org.drools.planner.examples.cloudbalancing.solver.Rule_computerCost_eb2dbb0704b64ca3a554fbda80ff54abDefaultConsequenceInvoker.evaluate(Unknown Source) ~[na:na]
	at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1421) ~[drools-core-6.0.0-SNAPSHOT.jar:6.0.0-SNAPSHOT]
	... 21 common frames omitted

{code}

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira