Here are the stack traces of the locked threads (copied from Eclipse's debugger, after suspending them): ------------------------ Thread 1 ---------------- Thread [TotalRecordings Thread] (Suspended) ClassLoader.findBootstrapClass(String) line: not available [native method] Launcher$ExtClassLoader(ClassLoader).findBootstrapClass0(String) line: 891 Launcher$ExtClassLoader(ClassLoader).loadClass(String, boolean) line: 301 Launcher$AppClassLoader(ClassLoader).loadClass(String, boolean) line: 299 Launcher$AppClassLoader.loadClass(String, boolean) line: 268 Launcher$AppClassLoader(ClassLoader).loadClass(String) line: 251 Launcher$AppClassLoader(ClassLoader).loadClassInternal(String) line: 319 ClassLoader.defineClass1(String, byte[], int, int, ProtectionDomain, String) line: not available [native method] Launcher$AppClassLoader(ClassLoader).defineClass(String, byte[], int, int, ProtectionDomain) line: 620 Launcher$AppClassLoader(SecureClassLoader).defineClass(String, byte[], int, int, CodeSource) line: 124 Launcher$AppClassLoader(URLClassLoader).defineClass(String, Resource) line: 260 URLClassLoader.access$100(URLClassLoader, String, Resource) line: 56 URLClassLoader$1.run() line: 195 AccessController.doPrivileged(PrivilegedExceptionAction, AccessControlContext) line: not available [native method] Launcher$AppClassLoader(URLClassLoader).findClass(String) line: 188 Launcher$AppClassLoader(ClassLoader).loadClass(String, boolean) line: 306 Launcher$AppClassLoader.loadClass(String, boolean) line: 268 Launcher$AppClassLoader(ClassLoader).loadClass(String) line: 251 Launcher$AppClassLoader(ClassLoader).loadClassInternal(String) line: 319 CommonObjectUtil.(boolean) line: 34 CommonObjectUtil.() line: 41 JsonSerializer(AbstractSerializer).() line: 20 JsonSerializer.() line: 27 ObjectToJsonSerializer.() line: 10 TotalRecordingsMessageHandler.onMessage(Object) line: 42 TotalRecordings.run() line: 86 Thread.run() line: 595 ------------------- Thread 2 ----------------------------- Thread [ShopModule Thread] (Suspended) ClassicWeavingStrategy.translate(AspectManager, String, ClassLoader, byte[]) line: 69 AspectManager.translate(String, ClassLoader, byte[]) line: 887 AspectManager.transform(ClassLoader, String, Class, ProtectionDomain, byte[]) line: 830 AOPTransformer.aspectTransform(String, ClassLoader, Class<?>, ProtectionDomain, byte[]) line: 88 AOPTransformer.transform(ClassLoader, String, Class<?>, ProtectionDomain, byte[]) line: 75 TransformerManager.transform(ClassLoader, String, Class, ProtectionDomain, byte[]) line: 122 InstrumentationImpl.transform(ClassLoader, String, Class, ProtectionDomain, byte[]) line: 155 Proxy.defineClass0(ClassLoader, String, byte[], int, int) line: not available [native method] Proxy.getProxyClass(ClassLoader, Class<?>...) line: 487 Proxy.newProxyInstance(ClassLoader, Class<?>[], InvocationHandler) line: 564 AnnotationParser.annotationForMap(Class, Map<String,Object>) line: 223 AnnotationParser.parseAnnotation(ByteBuffer, ConstantPool, Class) line: 213 AnnotationParser.parseAnnotations2(byte[], ConstantPool, Class) line: 69 AnnotationParser.parseAnnotations(byte[], ConstantPool, Class) line: 52 Class.initAnnotationsIfNecessary() line: 2998 Class.getAnnotation(Class) line: 2958 AnnotationType.(Class<?>) line: 104 AnnotationType.getInstance(Class) line: 64 AnnotationParser.parseAnnotation(ByteBuffer, ConstantPool, Class) line: 186 AnnotationParser.parseAnnotations2(byte[], ConstantPool, Class) line: 69 AnnotationParser.parseAnnotations(byte[], ConstantPool, Class) line: 52 Class.initAnnotationsIfNecessary() line: 2998 Class.getAnnotation(Class) line: 2958 AnnotationElement.getVisibleAnnotation(Class, Class) line: 88 PortableAnnotationElement.getAnyAnnotation(Class, Class) line: 402 AdvisorMatcherStrategy(MatcherStrategy).subtypeOf(Class, ClassExpression, Advisor) line: 63 Util.subtypeOf(Class, ClassExpression, Advisor) line: 413 Util.matchesClassExpr(ClassExpression, Class, Advisor) line: 124 InterfaceIntroduction.matches(Advisor, Class) line: 234 AspectManager.applyInterfaceIntroductions(Advisor, Class) line: 1580 ClassAdvisor$1.run() line: 289 AccessController.doPrivileged(PrivilegedExceptionAction) line: not available [native method] ClassAdvisor.attachClass(Class) line: 272 AspectManager.initialiseClassAdvisor(Class, ClassAdvisor) line: 600 AspectManager.getAdvisor(Class) line: 587 Product.() line: 20 ShopModule.run() line: 34 Thread.run() line: 595 -------------------------------------------------- I'm not sure how feasible it'd be for me to deploy the application on a JBoss application server. It's not a J2EE (or even a web) application, and I have a feeling that trying to deploy it can potentially make me bounce into some tricky problems because of the use of native libraries and some components which may behave differently under an application server (e.g. a JMS broker). Perhaps there is a way to use JBoss's ClassLoader without deploying on the server? Other than that, if the ClassLoader is related, it worth mentioning that we're using Sun's j2sdk-1.5.0_05. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3991299#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...