[jboss-jira] [JBoss JIRA] (DROOLS-78) NullPointerException in windows eviction

[Mario Fusco (JIRA)]

     [ https://issues.jboss.org/browse/DROOLS-78?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mario Fusco resolved DROOLS-78.
-------------------------------

    Fix Version/s: 5.5.1.Final
                   6.0.0.CR2
       Resolution: Done

    
> NullPointerException in windows eviction
> ----------------------------------------
>
>                 Key: DROOLS-78
>                 URL: https://issues.jboss.org/browse/DROOLS-78
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 5.5.0.Final
>            Reporter: Radai Rosenblatt
>            Assignee: Mario Fusco
>            Priority: Blocker
>             Fix For: 5.5.1.Final, 6.0.0.CR2
>
>         Attachments: droolsIssue.zip
>
>
> when writing a (fusion) rule with a length window and inserting more events than the window size drools produces a null pointer exception on the 1st event over the window size.
> the exception produced is:
> java.lang.NullPointerException
> 	at org.drools.core.util.index.RightTupleIndexHashTable.remove(RightTupleIndexHashTable.java:363)
> 	at org.drools.reteoo.AccumulateNode.retractRightTuple(AccumulateNode.java:318)
> 	at org.drools.rule.SlidingLengthWindow.assertFact(SlidingLengthWindow.java:116)
> 	at org.drools.rule.BehaviorManager.assertFact(BehaviorManager.java:94)
> 	at org.drools.reteoo.WindowNode.assertObject(WindowNode.java:167)
> 	at org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:497)
> 	at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:382)
> 	at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:235)
> 	at org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:240)
> 	at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:350)
> 	at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:311)
> 	at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:127)
> 	at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:55)
> a similar exception happens when the rule is re-written to use a time window (and the test updated to overflow that window):
> org.drools.RuntimeDroolsException: Unexpected exception executing action org.drools.rule.SlidingTimeWindow$BehaviorExpireWMAction at 1dc39fc3
> 	at org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:995)
> 	at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:335)
> 	at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:311)
> 	at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:127)
> 	at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:55)
> 	at TestBug2.testBug(TestBug2.java:96)
> 	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:45)
> 	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
> 	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
> 	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
> 	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
> 	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
> 	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
> 	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
> 	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
> 	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
> 	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
> 	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
> 	at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
> 	at org.junit.runner.JUnitCore.run(JUnitCore.java:157)
> 	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:76)
> 	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:195)
> 	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:63)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> 	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
> Caused by: java.lang.NullPointerException
> 	at org.drools.core.util.index.RightTupleIndexHashTable.remove(RightTupleIndexHashTable.java:363)
> 	at org.drools.reteoo.AccumulateNode.retractRightTuple(AccumulateNode.java:318)
> 	at org.drools.rule.SlidingTimeWindow.expireFacts(SlidingTimeWindow.java:189)
> 	at org.drools.rule.SlidingTimeWindow$BehaviorExpireWMAction.execute(SlidingTimeWindow.java:471)
> 	at org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:993)
> 	... 31 more

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