我已经编写了一个简单的Web应用程序来使用Apache Deltaspike 0.5，但遇到了问题。该应用程序是一个简单的JavaEE 6应用程序，部署为JBoss EAP 6.1上EAR的一部分。我已经在beans.xml文件中声明了Apache Deltaspike Security模块拦截器，但是在部署应用程序时，我看到了以下异常：
[0m[0m12:41:52,798 INFO [org.apache.deltaspike.core.util.ClassDeactivationUtils] (MSC service thread 1-2) class: org.apache.deltaspike.jsf.impl.config.view.ViewConfigExtension activated=true
[0m[31m12:41:52,806 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-2) MSC000001: Failed to start service jboss.deployment.unit."MyTestApp.ear".WeldStartService: org.jboss.msc.service.StartException in service jboss.deployment.unit."MyTestApp.ear".WeldStartService: Failed to start service
at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1767) [jboss-msc-1.0.4.GA-redhat-1.jar:1.0.4.GA-redhat-1]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) [rt.jar:1.7.0_07]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) [rt.jar:1.7.0_07]
at java.lang.Thread.run(Thread.java:722) [rt.jar:1.7.0_07]
Caused by: org.jboss.weld.exceptions.DefinitionException: Exception List with 1 exceptions:
Exception 0 :
javax.enterprise.event.ObserverException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
at java.lang.Class.newInstance0(Class.java:372)
at java.lang.Class.newInstance(Class.java:325)
at org.jboss.weld.util.reflection.SecureReflections$16.work(SecureReflections.java:344)
at org.jboss.weld.util.reflection.SecureReflectionAccess.run(SecureReflectionAccess.java:52)
at org.jboss.weld.util.reflection.SecureReflectionAccess.runAsInstantiation(SecureReflectionAccess.java:173)
at org.jboss.weld.util.reflection.SecureReflections.newInstance(SecureReflections.java:341)
at org.jboss.weld.injection.Exceptions.rethrowException(Exceptions.java:33)
at org.jboss.weld.injection.Exceptions.rethrowException(Exceptions.java:73)
at org.jboss.weld.injection.MethodInjectionPoint.invokeOnInstanceWithSpecialValue(MethodInjectionPoint.java:162)
at org.jboss.weld.event.ObserverMethodImpl.sendEvent(ObserverMethodImpl.java:245)
at org.jboss.weld.event.ObserverMethodImpl.sendEvent(ObserverMethodImpl.java:233)
at org.jboss.weld.event.ObserverMethodImpl.notify(ObserverMethodImpl.java:213)
at org.jboss.weld.bootstrap.events.AbstractContainerEvent.fire(AbstractContainerEvent.java:75)
at org.jboss.weld.bootstrap.events.AbstractDefinitionContainerEvent.fire(AbstractDefinitionContainerEvent.java:46)
at org.jboss.weld.bootstrap.events.BeforeBeanDiscoveryImpl.fire(BeforeBeanDiscoveryImpl.java:46)
at org.jboss.weld.bootstrap.WeldBootstrap.startInitialization(WeldBootstrap.java:335)
at org.jboss.as.weld.WeldStartService.start(WeldStartService.java:62)
at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811)
at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
Caused by: java.util.ServiceConfigurationError: org.apache.deltaspike.core.spi.config.ConfigSourceProvider: Provider org.apache.deltaspike.core.impl.config.DefaultConfigSourceProvider could not be instantiated: java.lang.ClassCastException: Cannot cast org.apache.deltaspike.core.impl.config.DefaultConfigSourceProvider to org.apache.deltaspike.core.spi.config.ConfigSourceProvider
at java.util.ServiceLoader.fail(ServiceLoader.java:224)
at java.util.ServiceLoader.access$100(ServiceLoader.java:181)
at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:370)
at java.util.ServiceLoader$1.next(ServiceLoader.java:438)
at org.apache.deltaspike.core.util.ServiceUtils.loadServiceImplementations(ServiceUtils.java:53)
at org.apache.deltaspike.core.api.config.ConfigResolver.resolveConfigSources(ConfigResolver.java:374)
at org.apache.deltaspike.core.api.config.ConfigResolver.getConfigSources(ConfigResolver.java:353)
at org.apache.deltaspike.core.api.config.ConfigResolver.getAllPropertyValues(ConfigResolver.java:306)
at org.apache.deltaspike.core.util.ClassDeactivationUtils.initConfiguredClassDeactivators(ClassDeactivationUtils.java:152)
at org.apache.deltaspike.core.util.ClassDeactivationUtils.getClassDeactivators(ClassDeactivationUtils.java:143)
at org.apache.deltaspike.core.util.ClassDeactivationUtils.initDeactivatableCacheFor(ClassDeactivationUtils.java:88)
at org.apache.deltaspike.core.util.ClassDeactivationUtils.isActivated(ClassDeactivationUtils.java:73)
at org.apache.deltaspike.core.impl.config.ConfigurationExtension.init(ConfigurationExtension.java:55)
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:601)
at org.jboss.weld.util.reflection.SecureReflections$13.work(SecureReflections.java:267)
at org.jboss.weld.util.reflection.SecureReflectionAccess.run(SecureReflectionAccess.java:52)
at org.jboss.weld.util.reflection.SecureReflectionAccess.runAsInvocation(SecureReflectionAccess.java:137)
at org.jboss.weld.util.reflection.SecureReflections.invoke(SecureReflections.java:263)
at org.jboss.weld.introspector.jlr.WeldMethodImpl.invokeOnInstance(WeldMethodImpl.java:170)
at org.jboss.weld.introspector.ForwardingWeldMethod.invokeOnInstance(ForwardingWeldMethod.java:51)
at org.jboss.weld.injection.MethodInjectionPoint.invokeOnInstanceWithSpecialValue(MethodInjectionPoint.java:154)
... 13 more
Caused by: java.lang.ClassCastException: Cannot cast org.apache.deltaspike.core.impl.config.DefaultConfigSourceProvider to org.apache.deltaspike.core.spi.config.ConfigSourceProvider
at java.lang.Class.cast(Class.java:3005)
at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:362)
... 34 more
at org.jboss.weld.bootstrap.events.AbstractDefinitionContainerEvent.fire(AbstractDefinitionContainerEvent.java:48)
at org.jboss.weld.bootstrap.events.BeforeBeanDiscoveryImpl.fire(BeforeBeanDiscoveryImpl.java:46)
at org.jboss.weld.bootstrap.WeldBootstrap.startInitialization(WeldBootstrap.java:335)
at org.jboss.as.weld.WeldStartService.start(WeldStartService.java:62)
at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811) [jboss-msc-1.0.4.GA-redhat-1.jar:1.0.4.GA-redhat-1]
at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746) [jboss-msc-1.0.4.GA-redhat-1.jar:1.0.4.GA-redhat-1]
... 3 more
[0m[0m12:41:52,817 INFO [org.jboss.as.controller] (DeploymentScanner-threads - 2) JBAS014774: Service status report
JBAS014777: Services which failed to start: service jboss.deployment.unit."MyTestApp.ear".WeldStartService: org.jboss.msc.service.StartException in service jboss.deployment.unit."MyTestApp.ear".WeldStartService: Failed to start service
我已经在Google周围搜索，但找不到任何提及类似错误的信息。该应用程序本身是基于我在PicketLink 2.5.1发行版中找到的一个简单示例应用程序，因此，它似乎并没有做任何非常复杂的事情。知道是什么原因造成的，或者我从哪里开始寻找答案？
最佳答案
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这是课本类加载器错误。您可能在类路径中不止一次拥有同一个jar，或者您的应用程序至少以某种方式具有两个类加载器，并且每个都加载了这些类的不同副本