Kabir Khan [http://community.jboss.org/people/kabir.khan%40jboss.com] replied to the discussion "JBoss Reflect Performance Javassist vs Introspection" To view the discussion, visit: http://community.jboss.org/message/538809#538809 -------------------------------------------------------------- I modified JavassistTypeInfoFactoryImpl to give some extra output. When a class can not be found it ends up in this method:    private TypeInfo delegateToIntrospectionImplementation(ClassLoader cl, String name) throws ClassNotFoundException    {       System.out.println("======> " + name + " " + cl);         //Extra code just for debugging       ClassPool pool = poolFactory.getPoolForLoader(cl);       try       {          CtClass ct = pool.get(name);       }       catch(Exception alreadyHandled)       {          System.out.println("---> Not found in " + pool);       }         Class<?> clazz = cl.loadClass(name);       System.out.println("---> Loaded real class from " + clazz.getClassLoader());         try       {          CtClass ct = pool.get(name);       }       catch(Exception alreadyHandled)       {          System.out.println("---> Not found again in " + pool);       }         pool = poolFactory.getPoolForLoader(clazz.getClassLoader());       try       {          CtClass ct = pool.get(name);          System.out.println("---> Found in actual pool " + pool);       }       catch(Exception alreadyHandled)       {          System.out.println("---> Not found in actual pool " + pool);       }           //Extra code - END         IntrospectionTypeInfoFactory factory = new IntrospectionTypeInfoFactory();       return factory.getTypeInfo(name, cl);    } Here is the output, this is during installing the beans from conf/bootstrap 17:16:06,954 INFO  [JMXKernel] Legacy JMX core initialized 17:16:07,009 INFO  [STDOUT] ======> org.jboss.aop.deployers.AspectManagerJMXRegistrar BaseClassLoader@47ac1adf{jmx-classloader:0.0.0$MODULE} 17:16:08,927 INFO  [STDOUT] ---> Not found in [org.jboss.classpool.plugins.jbosscl.JBossClDelegatingClassPool@2002512083 [class path: BaseClassLoader@47ac1adf{jmx-classloader:0.0.0$MODULE}:] - dcl:BaseClassLoader@47ac1adf{jmx-classloader:0.0.0$MODULE} domain: [org.jboss.classpool.plugins.jbosscl.JBossClClassPoolDomain@101ebf5c name:DefaultDomain]] 17:16:08,930 INFO  [STDOUT] ---> Loaded real class from BaseClassLoader@8a85268{aop-classloader:0.0.0$MODULE} 17:16:08,931 INFO  [STDOUT] ---> Not found again in [org.jboss.classpool.plugins.jbosscl.JBossClDelegatingClassPool@2002512083 [class path: BaseClassLoader@47ac1adf{jmx-classloader:0.0.0$MODULE}:] - dcl:BaseClassLoader@47ac1adf{jmx-classloader:0.0.0$MODULE} domain: [org.jboss.classpool.plugins.jbosscl.JBossClClassPoolDomain@101ebf5c name:DefaultDomain]] 17:16:08,931 INFO  [STDOUT] ---> Found in actual pool org.jboss.classpool.spi.AbstractClassPool@697579067 [class path: BaseClassLoader@8a85268{aop-classloader:0.0.0$MODULE}:] - dcl:BaseClassLoader@8a85268{aop-classloader:0.0.0$MODULE} 17:16:09,563 INFO  [STDOUT] ======> org.jboss.aop.asintegration.jboss5.AOPAnnotationMetaDataParserDeployer BaseClassLoader@280bca{deployers-classloader:0.0.0$MODULE} 17:16:10,283 INFO  [STDOUT] ---> Not found in [org.jboss.classpool.plugins.jbosscl.JBossClDelegatingClassPool@404225673 [class path: BaseClassLoader@280bca{deployers-classloader:0.0.0$MODULE}:] - dcl:BaseClassLoader@280bca{deployers-classloader:0.0.0$MODULE} domain: [org.jboss.classpool.plugins.jbosscl.JBossClClassPoolDomain@101ebf5c name:DefaultDomain]] 17:16:10,287 INFO  [STDOUT] ---> Loaded real class from BaseClassLoader@8a85268{aop-classloader:0.0.0$MODULE} 17:16:10,289 INFO  [STDOUT] ---> Not found again in [org.jboss.classpool.plugins.jbosscl.JBossClDelegatingClassPool@404225673 [class path: BaseClassLoader@280bca{deployers-classloader:0.0.0$MODULE}:] - dcl:BaseClassLoader@280bca{deployers-classloader:0.0.0$MODULE} domain: [org.jboss.classpool.plugins.jbosscl.JBossClClassPoolDomain@101ebf5c name:DefaultDomain]] 17:16:10,289 INFO  [STDOUT] ---> Found in actual pool org.jboss.classpool.spi.AbstractClassPool@697579067 [class path: BaseClassLoader@8a85268{aop-classloader:0.0.0$MODULE}:] - dcl:BaseClassLoader@8a85268{aop-classloader:0.0.0$MODULE} As you can see AspectManagerJMXRegistrar is loaded from the classloader used to install jmx.xml, and AOPAnnotationMetaDataParserDeployer from deployers.xml's classloader. If I use the pools for those loaders directly I get a NotFoundException. If I try to load the class from the loader directly it works, and in both cases the classes returned are loaded from the classloader used for aop.xml  (AspectManagerJMXRegistrar comes from jboss-aop-asintegration-core.jar, and AOPAnnotationMetaDataParserDeployer comes from jboss-aop-deployers.jar). Next I get an error that brings everything to a halt (with some extra debug information compared to the error message that is in svn): 17:16:13,036 ERROR [AbstractKernelController] Error installing to PreInstall: name=AOPClassLoaderDeployer state=Real: java.lang.NoClassDefFoundError: Unable to find class org.jboss.aop.asintegration.jboss5.AOPClassLoaderDeployer from org.jboss.osgi.integration.jbossas.AOPClassLoaderDeployerJBAS7909 in pool [org.jboss.classpool.plugins.jbosscl.JBossClDelegatingClassPool@404225673 [class path: BaseClassLoader@280bca{deployers-classloader:0.0.0$MODULE}:] - dcl:BaseClassLoader@280bca{deployers-classloader:0.0.0$MODULE} domain: [org.jboss.classpool.plugins.jbosscl.JBossClClassPoolDomain@101ebf5c name:DefaultDomain]]      at org.jboss.reflect.plugins.javassist.JavassistTypeInfoFactoryImpl.raiseClassNotFound(JavassistTypeInfoFactoryImpl.java:104) [jboss-reflect.jar:2.2.0-SNAPSHOT]      at org.jboss.reflect.plugins.javassist.JavassistTypeInfo.getSuperclass(JavassistTypeInfo.java:235) [jboss-reflect.jar:2.2.0-SNAPSHOT]      at org.jboss.beans.info.plugins.AbstractBeanInfoFactory.getMethods(AbstractBeanInfoFactory.java:262) [jboss-reflect.jar:2.2.0-SNAPSHOT]      at org.jboss.beans.info.plugins.AbstractBeanInfoFactory.getBeanInfo(AbstractBeanInfoFactory.java:152) [jboss-reflect.jar:2.2.0-SNAPSHOT]      at org.jboss.config.plugins.AbstractConfiguration.getBeanInfo(AbstractConfiguration.java:87) [jboss-reflect.jar:2.2.0-SNAPSHOT]      at org.jboss.kernel.plugins.config.AbstractKernelConfig.getBeanInfo(AbstractKernelConfig.java:80) [jboss-kernel.jar:2.2.0.Alpha9]      at org.jboss.kernel.plugins.config.AbstractKernelConfigurator.getBeanInfo(AbstractKernelConfigurator.java:78) [jboss-kernel.jar:2.2.0.Alpha9]      at org.jboss.kernel.plugins.config.AbstractKernelConfigurator.getBeanInfo(AbstractKernelConfigurator.java:97) [jboss-kernel.jar:2.2.0.Alpha9]      at org.jboss.kernel.plugins.dependency.PreInstallAction.installActionInternal(PreInstallAction.java:88) [jboss-kernel.jar:2.2.0.Alpha9]      at org.jboss.kernel.plugins.dependency.InstallsAwareAction.installAction(InstallsAwareAction.java:54) [jboss-kernel.jar:2.2.0.Alpha9]      at org.jboss.kernel.plugins.dependency.InstallsAwareAction.installAction(InstallsAwareAction.java:42) [jboss-kernel.jar:2.2.0.Alpha9]      at org.jboss.dependency.plugins.action.SimpleControllerContextAction.simpleInstallAction(SimpleControllerContextAction.java:62) [jboss-dependency.jar:2.2.0.Alpha9]      at org.jboss.dependency.plugins.action.AccessControllerContextAction.install(AccessControllerContextAction.java:71) [jboss-dependency.jar:2.2.0.Alpha9]      at org.jboss.dependency.plugins.AbstractControllerContextActions.install(AbstractControllerContextActions.java:51) [jboss-dependency.jar:2.2.0.Alpha9]      at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:377) [jboss-dependency.jar:2.2.0.Alpha9]      at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:2042) [jboss-dependency.jar:2.2.0.Alpha9]      at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:1081) [jboss-dependency.jar:2.2.0.Alpha9]      at org.jboss.dependency.plugins.AbstractController.executeOrIncrementStateDirectly(AbstractController.java:1320) [jboss-dependency.jar:2.2.0.Alpha9]      at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1244) [jboss-dependency.jar:2.2.0.Alpha9]      at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1137) [jboss-dependency.jar:2.2.0.Alpha9]      at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:892) [jboss-dependency.jar:2.2.0.Alpha9]      at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:639) [jboss-dependency.jar:2.2.0.Alpha9]      at org.jboss.kernel.plugins.deployment.AbstractKernelDeployer.deployBean(AbstractKernelDeployer.java:319) [jboss-kernel.jar:2.2.0.Alpha9]      at org.jboss.kernel.plugins.deployment.AbstractKernelDeployer.deployBeans(AbstractKernelDeployer.java:297) [jboss-kernel.jar:2.2.0.Alpha9]      at org.jboss.kernel.plugins.deployment.AbstractKernelDeployer.deploy(AbstractKernelDeployer.java:130) [jboss-kernel.jar:2.2.0.Alpha9]      at org.jboss.kernel.plugins.deployment.BasicKernelDeployer.deploy(BasicKernelDeployer.java:76) [jboss-kernel.jar:2.2.0.Alpha9]      at org.jboss.bootstrap.impl.mc.deployer.TempBasicXMLDeployer.deploy(TempBasicXMLDeployer.java:92) [jboss-bootstrap-impl-mc.jar:2.1.0-SNAPSHOT]      at org.jboss.bootstrap.impl.mc.deployer.TempBasicXMLDeployer.deploy(TempBasicXMLDeployer.java:193) [jboss-bootstrap-impl-mc.jar:2.1.0-SNAPSHOT]      at org.jboss.bootstrap.impl.mc.server.AbstractMCServerBase.bootstrapMcAndDescriptors(AbstractMCServerBase.java:318) [jboss-bootstrap-impl-mc.jar:2.1.0-SNAPSHOT]      at org.jboss.bootstrap.impl.mc.server.AbstractMCServerBase.doStart(AbstractMCServerBase.java:265) [jboss-bootstrap-impl-mc.jar:2.1.0-SNAPSHOT]      at org.jboss.bootstrap.impl.as.server.AbstractJBossASServerBase.doStart(AbstractJBossASServerBase.java:381) [jboss-bootstrap-impl-as.jar:2.1.0-SNAPSHOT]      at org.jboss.bootstrap.impl.base.server.AbstractServer$StartServerTask.run(AbstractServer.java:413) [jboss-bootstrap-impl-base.jar:2.1.0-SNAPSHOT]      at java.lang.Thread.run(Thread.java:637) [:1.6.0_17] This is caused by a call to CtClass.getSuperClass() for org.jboss.osgi.integration.jbossas.AOPClassLoaderDeployerJBAS7909 which has the deployers.xml classpool, but the superclass lives in the aop.xml classpool. So something is going wrong during bootstrap, and it looks like the classpools can't see classes from the other pools within the domain, while the classloaders can see classes from the other loaders in the domain. What is weird is that from bootstrap.xml it looks like the RegisterModuleCallback (from aop.xml) should be deployed before jmx.xml and deployers.xml, but could there be anything else missing at this stage? <bootstrap xmlns="urn:jboss:bootstrap:1.0">    <url>bootstrap/vfs.xml</url>    <url>bootstrap/classloader.xml</url>    <url>bootstrap/stdio.xml</url>    <url>bootstrap/kernel.xml</url>    <url>bootstrap/aop.xml</url>    <url>bootstrap/jmx.xml</url>    <url>bootstrap/deployers.xml</url>    <url>bootstrap/profile.xml</url> </bootstrap> -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/538809#538809] Start a new discussion in JBoss Microcontainer Development at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]