[jboss-jira] [JBoss JIRA] (DROOLS-1751) NullPointerException on org.mvel2.MVEL.executeExpression()

[Toshiya Kobayashi (JIRA)]

Toshiya Kobayashi created DROOLS-1751:
-----------------------------------------

             Summary: NullPointerException on org.mvel2.MVEL.executeExpression()
                 Key: DROOLS-1751
                 URL: https://issues.jboss.org/browse/DROOLS-1751
             Project: Drools
          Issue Type: Bug
          Components: core engine
    Affects Versions: 7.3.0.Final
            Reporter: Toshiya Kobayashi
            Assignee: Mario Fusco


Under the conditions:

- 2 KiePackages with the same package name but different rules
- Those packages are used by a kbase so "inUse = true"
- Create another kbase and call kbase.addPackages() for those packages

MVELDialectRuntimeData has a problem in merging mvelReaders so later rule execution fails with NullPointerException.

{noformat}
java.lang.NullPointerException: null
	at org.mvel2.MVEL.executeExpression(MVEL.java:953)
	at org.drools.core.util.MVELSafeHelper$RawMVELEvaluator.executeExpression(MVELSafeHelper.java:506)
	at org.drools.core.base.extractors.MVELObjectClassFieldReader.getValue(MVELObjectClassFieldReader.java:140)
	at org.drools.core.rule.Declaration.getValue(Declaration.java:222)
	at org.drools.core.base.mvel.MVELCompilationUnit.updateFactory(MVELCompilationUnit.java:386)
	at org.drools.core.base.mvel.MVELCompilationUnit.getFactory(MVELCompilationUnit.java:320)
	at org.drools.core.base.dataproviders.MVELDataProvider.evaluate(MVELDataProvider.java:137)
	at org.drools.core.base.dataproviders.MVELDataProvider.getResults(MVELDataProvider.java:133)
	at org.drools.core.phreak.PhreakFromNode.doLeftInserts(PhreakFromNode.java:106)
	at org.drools.core.phreak.PhreakFromNode.doNode(PhreakFromNode.java:68)
	at org.drools.core.phreak.RuleNetworkEvaluator.evalNode(RuleNetworkEvaluator.java:387)
	at org.drools.core.phreak.RuleNetworkEvaluator.innerEval(RuleNetworkEvaluator.java:333)
	at org.drools.core.phreak.RuleNetworkEvaluator.outerEval(RuleNetworkEvaluator.java:169)
	at org.drools.core.phreak.RuleNetworkEvaluator.evaluateNetwork(RuleNetworkEvaluator.java:127)
	at org.drools.core.phreak.RuleExecutor.reEvaluateNetwork(RuleExecutor.java:212)
	at org.drools.core.phreak.RuleExecutor.evaluateNetworkAndFire(RuleExecutor.java:87)
	at org.drools.core.concurrent.AbstractRuleEvaluator.internalEvaluateAndFire(AbstractRuleEvaluator.java:34)
	at org.drools.core.concurrent.SequentialRuleEvaluator.evaluateAndFire(SequentialRuleEvaluator.java:43)
	at org.drools.core.common.DefaultAgenda.fireLoop(DefaultAgenda.java:1067)
	at org.drools.core.common.DefaultAgenda.internalFireAllRules(DefaultAgenda.java:1014)
	at org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1006)
	at org.drools.core.impl.StatefulKnowledgeSessionImpl.internalFireAllRules(StatefulKnowledgeSessionImpl.java:1320)
	at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1311)
	at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1295)
	at org.drools.compiler.integrationtests.Misc2Test.testMergeMVELDialect(Misc2Test.java:9109)
{noformat}



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