Incremental update causes NPE in TypeDeclarationFactory when declaring interface as @PropertyReactive event. ------------------------------------------------------------------------------------------------------------ Key: DROOLS-861 URL: https://issues.jboss.org/browse/DROOLS-861 Project: Drools Issue Type: Bug Components: core engine Affects Versions: 6.3.0.Beta2 Environment: Mac OS X 10.10.3, Oracle JDK 1.7.0_79 Reporter: Duncan Doyle Assignee: Mario Fusco When incrementally updating a KieContainer, the TypeDeclarationFactory throws an NPE when an Interface is declared as an @PropertyReactive event in the new rulebase. {code} java.lang.NullPointerException at org.drools.compiler.builder.impl.TypeDeclarationFactory.compareTypeDeclarations(TypeDeclarationFactory.java:214) at org.drools.compiler.builder.impl.TypeDeclarationFactory.checkRedeclaration(TypeDeclarationFactory.java:152) at org.drools.compiler.builder.impl.TypeDeclarationBuilder.createBean(TypeDeclarationBuilder.java:235) at org.drools.compiler.builder.impl.TypeDeclarationBuilder.processTypeDeclarations(TypeDeclarationBuilder.java:128) at org.drools.compiler.builder.impl.CompositeKnowledgeBuilderImpl.buildTypeDeclarations(CompositeKnowledgeBuilderImpl.java:333) at org.drools.compiler.builder.impl.CompositeKnowledgeBuilderImpl.buildPackages(CompositeKnowledgeBuilderImpl.java:117) at org.drools.compiler.builder.impl.CompositeKnowledgeBuilderImpl.build(CompositeKnowledgeBuilderImpl.java:105) at org.drools.compiler.kie.builder.impl.KieContainerImpl.rebuildAll(KieContainerImpl.java:369) at org.drools.compiler.kie.builder.impl.KieContainerImpl.update(KieContainerImpl.java:207) at org.drools.compiler.kie.builder.impl.KieContainerImpl.updateToVersion(KieContainerImpl.java:128) at org.jboss.ddoyle.drools.IncrementalUpdateTest.test(IncrementalUpdateTest.java:48) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) 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.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70) 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$2.evaluate(ParentRunner.java:229) at org.junit.runners.ParentRunner.run(ParentRunner.java:309) at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252) at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141) at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189) at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165) at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85) at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115) at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75){code} See reproducer here: https://github.com/DuncanDoyle/drools-declare-interface-incremental-updat... Simply run {{mvn clean test}}