[jboss-jira] [JBoss JIRA] (DROOLS-220) NullPointerException when retracting a fact

[Mario Fusco (JIRA)]

     [ https://issues.jboss.org/browse/DROOLS-220?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mario Fusco resolved DROOLS-220.
--------------------------------

    Resolution: Cannot Reproduce Bug


I couldn't reproduce this bug on master so I am assuming this has been fixed by a previous commit.
                
> NullPointerException when retracting a fact
> -------------------------------------------
>
>                 Key: DROOLS-220
>                 URL: https://issues.jboss.org/browse/DROOLS-220
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 6.0.0.CR1
>            Reporter: Sergey Zh
>            Assignee: Mario Fusco
>         Attachments: drools6-bug.zip
>
>
> {code}
> java.lang.NullPointerException
> 	at org.drools.core.phreak.PhreakFromNode.unlinkCreatedHandles(PhreakFromNode.java:268)
> 	at org.drools.core.phreak.PhreakFromNode.doLeftDeletes(PhreakFromNode.java:258)
> 	at org.drools.core.phreak.PhreakFromNode.doNode(PhreakFromNode.java:41)
> 	at org.drools.core.phreak.RuleNetworkEvaluator.innerEval(RuleNetworkEvaluator.java:303)
> 	at org.drools.core.phreak.RuleNetworkEvaluator.outerEval(RuleNetworkEvaluator.java:161)
> 	at org.drools.core.phreak.RuleNetworkEvaluator.evaluateNetwork(RuleNetworkEvaluator.java:116)
> 	at org.drools.core.phreak.RuleExecutor.reEvaluateNetwork(RuleExecutor.java:205)
> 	at org.drools.core.phreak.RuleExecutor.evaluateNetworkAndFire(RuleExecutor.java:65)
> 	at org.drools.core.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:936)
> 	at org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1183)
> 	at org.drools.core.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:935)
> 	at org.drools.core.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:909)
> 	at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:233)
> 	at org.drools.bug.DroolsTest.test(DroolsTest.java:29)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
> 	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> 	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
> 	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> 	at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
> 	at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:83)
> 	at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
> 	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:231)
> 	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
> 	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
> 	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
> 	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
> 	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
> 	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
> 	at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
> 	at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71)
> 	at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
> 	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:174)
> 	at org.junit.runner.JUnitCore.run(JUnitCore.java:160)
> 	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:76)
> 	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:195)
> 	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:63)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> 	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
> {code}
> If you comment 
> {code}
> $otherInfo: Map($greeting: get("greeting"), $greeting != null) from cache[$alt_id];
> {code}
> in the second rule then everything works without NPE

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