Hi, I have just upgraded to Drools 5.2.0.Final and am getting a weird error when running unit tests. java.lang.NullPointerException at org.aspectj.weaver.loadtime.ClassLoaderWeavingAdaptor.parseDefinitions( ClassLoaderWeavingAdaptor.java:251) at org.aspectj.weaver.loadtime.DefaultWeavingContext.getDefinitions( DefaultWeavingContext.java:130) at org.aspectj.weaver.loadtime.ClassLoaderWeavingAdaptor.initialize( ClassLoaderWeavingAdaptor.java:161) at org.aspectj.weaver.loadtime.Aj$ExplicitlyInitializedClassLoaderWeavingAdaptor.initialize( Aj.java:271) at org.aspectj.weaver.loadtime.Aj$ExplicitlyInitializedClassLoaderWeavingAdaptor.getWeavingAdaptor( Aj.java:276) at org.aspectj.weaver.loadtime.Aj$WeaverContainer.getWeaver(Aj.java:254) at org.aspectj.weaver.loadtime.Aj.preProcess(Aj.java:90) at org.aspectj.weaver.loadtime.ClassPreProcessorAgentAdapter.transform( ClassPreProcessorAgentAdapter.java:54) at sun.instrument.TransformerManager.transform(TransformerManager.java:169 ) at sun.instrument.InstrumentationImpl.transform( InstrumentationImpl.java:365) at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632) at java.lang.ClassLoader.defineClass(ClassLoader.java:616) at org.drools.rule.JavaDialectRuntimeData$PackageClassLoader.fastFindClass( JavaDialectRuntimeData.java:570) at org.drools.util.CompositeClassLoader$CachingLoader.load( CompositeClassLoader.java:258) at org.drools.util.CompositeClassLoader$CachingLoader.load( CompositeClassLoader.java:241) at org.drools.util.CompositeClassLoader.loadClass( CompositeClassLoader.java:88) at java.lang.ClassLoader.loadClass(ClassLoader.java:248) at org.drools.rule.JavaDialectRuntimeData.wire( JavaDialectRuntimeData.java:405) at org.drools.rule.JavaDialectRuntimeData.wire( JavaDialectRuntimeData.java:396) at org.drools.rule.JavaDialectRuntimeData.onBeforeExecute( JavaDialectRuntimeData.java:237) at org.drools.rule.DialectRuntimeRegistry.onBeforeExecute( DialectRuntimeRegistry.java:132) at org.drools.compiler.PackageBuilder.reloadAll(PackageBuilder.java:796) at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:751) at org.drools.compiler.PackageBuilder.addPackageFromDrl( PackageBuilder.java:360) at org.drools.compiler.PackageBuilder.addKnowledgeResource( PackageBuilder.java:538) at org.drools.builder.impl.KnowledgeBuilderImpl.add( KnowledgeBuilderImpl.java:28) at au.com.promedicus.rules.KnowledgeBaseBuilder.addPackagesFromList( KnowledgeBaseBuilder.java:108) at au.com.promedicus.rules.KnowledgeBaseBuilder.build( KnowledgeBaseBuilder.java:69) at au.com.promedicus.rules.KnowledgeBaseBuilder.build( KnowledgeBaseBuilder.java:54) I have traced the problem to org.drools.rule. JavaDialectRuntimeData$PackageClassLoader.getResources. This returns null whereas AspectJ expects it to at least return an empty enumeration - hence the NPE. Interestingly the problem does not occur when running our server, however we can't upgrade unless our unit tests pass and we can't easily turn off aspectj for these. regards Steve

We got exactly the same issue, but I think it could just return empty enumeration rather than null? Cited from the javadoc *Enumberation<URL> getResources(String name)* /An enumeration of URL objects for the resource. If no resources could be found, the enumeration will be empty. Resources that the class loader doesn't have access to will not be in the enumeration./ stevearoonie wrote: > > Clarification to this - it does also happen when we run our server. So > this > is preventing us from upgrading to 5.2 > > My guess is that getResources should return getParent().getResources() > rather than null. > > regards > Steve > > -- View this message in context: http://drools.46999.n3.nabble.com/rules-users-Classloading-error-with-Asp... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users