Nobody from the "core team" acknowledged this as justified - it looks
reasonable to me.
-W
---------- Forwarded message ----------
From: Steven Williams <stevearoonie(a)gmail.com>
Date: 2011/7/6
Subject: Re: [rules-users] Classloading error with AspectJ and Drools
5.2.0.Final
To: Rules Users List <rules-users(a)lists.jboss.org>
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
On Wed, Jul 6, 2011 at 1:42 PM, Steven Williams <stevearoonie(a)gmail.com>wrote:
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
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