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: Mark Proctor Priority: Blocker 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@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