java - 在 Weblogic 9.2 上运行 Spring 应用程序时出现 ClassCastException

Question

我正在尝试将 Spring 3 应用程序部署到 Weblogic 9.2。 JDK 是 JRockit 1.5。我正在使用 jaxb 2.1 并将这些 jar 包含在 war 中。

我尝试将其添加到 weblogic.xml 中，认为我所包含的内容与运行它的环境之间存在冲突。

<wls:container-descriptor>
  <wls:prefer-web-inf-classes>true</wls:prefer-web-inf-classes>
</wls:container-descriptor>

还是没有运气。我是否在做一些被禁止的事情，或者只是缺少一个关键的配置？

如果我遗漏了一些相关内容，请询问。提前致谢。

错误如下:

 [wldeploy] java.lang.ClassCastException: weblogic.xml.jaxp.RegistryDocumentBuilderFactory
 [wldeploy]   at javax.xml.parsers.DocumentBuilderFactory.newInstance(Unknown Source)
 [wldeploy]   at org.springframework.beans.factory.xml.DefaultDocumentLoader.createDocumentBuilderFactory(DefaultDocumentLoader.java:87)
 [wldeploy]   at org.springframework.beans.factory.xml.DefaultDocumentLoader.loadDocument(DefaultDocumentLoader.java:68)
 [wldeploy]   at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:361)
 [wldeploy]   at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:313)
 [wldeploy]   at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:290)
 [wldeploy]   at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:131)
 [wldeploy]   at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:147)
 [wldeploy]   at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:124)
 [wldeploy]   at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:92)
 [wldeploy]   at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:101)
 [wldeploy]   at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:394)
 [wldeploy]   at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:324)
 [wldeploy]   at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:246)
 [wldeploy]   at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:189)
 [wldeploy]   at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:49)
 [wldeploy]   at weblogic.servlet.internal.EventsManager$FireContextListenerAction.run(EventsManager.java:376)
 [wldeploy]   at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
 [wldeploy]   at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
 [wldeploy]   at weblogic.servlet.internal.EventsManager.notifyContextCreatedEvent(EventsManager.java:82)
 [wldeploy]   at weblogic.servlet.internal.WebAppServletContext.preloadResources(WebAppServletContext.java:1608)
 [wldeploy]   at weblogic.servlet.internal.WebAppServletContext.start(WebAppServletContext.java:2750)
 [wldeploy]   at weblogic.servlet.internal.WebAppModule.startContexts(WebAppModule.java:889)
 [wldeploy]   at weblogic.servlet.internal.WebAppModule.start(WebAppModule.java:333)
 [wldeploy]   at weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:204)
 [wldeploy]   at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26)
 [wldeploy]   at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:60)
 [wldeploy]   at weblogic.application.internal.flow.ScopedModuleDriver.start(ScopedModuleDriver.java:200)
 [wldeploy]   at weblogic.application.internal.flow.ModuleListenerInvoker.start(ModuleListenerInvoker.java:117)
 [wldeploy]   at weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:204)
 [wldeploy]   at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26)
 [wldeploy]   at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:60)
 [wldeploy]   at weblogic.application.internal.flow.StartModulesFlow.activate(StartModulesFlow.java:26)
 [wldeploy]   at weblogic.application.internal.BaseDeployment$2.next(BaseDeployment.java:635)
 [wldeploy]   at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26)
 [wldeploy]   at weblogic.application.internal.BaseDeployment.activate(BaseDeployment.java:212)
 [wldeploy]   at weblogic.application.internal.DeploymentStateChecker.activate(DeploymentStateChecker.java:154)
 [wldeploy]   at weblogic.deploy.internal.targetserver.AppContainerInvoker.activate(AppContainerInvoker.java:80)
 [wldeploy]   at weblogic.deploy.internal.targetserver.operations.AbstractOperation.activate(AbstractOperation.java:566)
 [wldeploy]   at weblogic.deploy.internal.targetserver.operations.ActivateOperation.activateDeployment(ActivateOperation.java:136)
 [wldeploy]   at weblogic.deploy.internal.targetserver.operations.ActivateOperation.doCommit(ActivateOperation.java:104)
 [wldeploy]   at weblogic.deploy.internal.targetserver.operations.AbstractOperation.commit(AbstractOperation.java:320)
 [wldeploy]   at weblogic.deploy.internal.targetserver.DeploymentManager.handleDeploymentCommit(DeploymentManager.java:815)
 [wldeploy]   at weblogic.deploy.internal.targetserver.DeploymentManager.activateDeploymentList(DeploymentManager.java:1222)
 [wldeploy]   at weblogic.deploy.internal.targetserver.DeploymentManager.handleCommit(DeploymentManager.java:433)
 [wldeploy]   at weblogic.deploy.internal.targetserver.DeploymentServiceDispatcher.commit(DeploymentServiceDispatcher.java:161)
 [wldeploy]   at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.doCommitCallback(DeploymentReceiverCallbackDeliverer.java:181)
 [wldeploy]   at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.access$100(DeploymentReceiverCallbackDeliverer.java:12)
 [wldeploy]   at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer$2.run(DeploymentReceiverCallbackDeliverer.java:67)
 [wldeploy]   at weblogic.work.ExecuteRequestAdapter.execute(ExecuteRequestAdapter.java:21)
 [wldeploy]   at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:145)
 [wldeploy]   at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:117)

Answer 1

看起来这个 ClassCastException 是类加载冲突的结果。

您说您正在将一些 JAR 文件与您的 Web 应用程序捆绑在一起(我猜是在 WEB-INF/lib 中)；我怀疑所发生的情况是，weblogic.xml.jaxp.RegistryDocumentBuilderFactory(WebLogic 的 DocumentBuilderFactory 实现)是由与加载其接口(interface)之一不同的类加载器加载的(或其父类(super class)，即 JAXP 的 DocumentBuilderFactory)。

让我们知道您在 WEB-INF/lib 中打包了哪些 JAR 文件；我很确定罪魁祸首就在那里。