weblogic92应用jar冲突初解决
weblogic版本：WebLogic Server 9.2
author：ifeelcold1999#gmail.com
主要参考资料：http://apache-cxf.group.iteye.com/group/wiki/1315-apache-cxf-in-weblogic-9-2-on-the-problem-of-positioning-and-expediency
Background:应用原来是部署在websphere上的，并且有专门的运维人员负责，新项目组要求部署到weblogic，并且没有运维，只能我自己搞了
1st
将应用打成war包，上传至服务器，在weblogic的console里install完成，选择start后，console提示
异常堆栈就不贴了，有需要可以联系我
主要的是这句
Caused by: java.lang.NoSuchMethodError: getTokenStartColumn
at org.codehaus.groovy.antlr.parser.GroovyLexer.makeToken(GroovyLexer.java:81)
这个makeToken方法会调用tok.setColumn(inputState.getTokenStartColumn());
inputState.getTokenStartColumn()是应用中antlr-2.7.6.jar的内容，考虑是weblogic自己的antlr相关类和antlr-2.7.6.jar中的内容不一样，反编译inputState对应的类antlr.LexerSharedInputState和weblogic.jar中同名的类，发现antlr-2.7.6.jar中的类的部分方法在weblogic.jar中的类里确实没有。
2nd
看到这里，首先想到的是在配置文件中设置prefer-web-inf-classes，使应用的jar加载早于weblogic自己的jar加载
在weblogic.xml中添加如下内容
<container-descriptor> <prefer-web-inf-classes>true</prefer-web-inf-classes> </container-descriptor>
Update然后启动应用，提示错误
这个的错误堆栈贴一下
$$2012-06-27 16:05:36|[ACTIVE] ExecuteThread: '2' for queue: 'weblogic.kernel.Default (self-tuning)'|org.springframework.web.context.ContextLoader|ERROR|org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:215)|Context initialization failed## org.springframework.beans.factory.BeanDefinitionStoreException: Unexpected exception parsing XML document from URL [zip:/app/wls92/bea/user_projects/domains/CxdxDomain/servers/Server7030/tmp/_WL_user/ebw/byb2o9/war/WEB-INF/lib/_wl_cls_gen.jar!/beans/ajax-views.xml]; nested exception is java.lang.LinkageError: Class javax/xml/namespace/QName violates loader constraints at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:420) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:342) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:310) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:143) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:178) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:149) at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:124) at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:92) at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:123) at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:423) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:353) at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:255) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:199) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:45) at weblogic.servlet.internal.EventsManager$FireContextListenerAction.run(EventsManager.java:376) at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321) at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121) at weblogic.servlet.internal.EventsManager.notifyContextCreatedEvent(EventsManager.java:82) at weblogic.servlet.internal.WebAppServletContext.preloadResources(WebAppServletContext.java:1616) at weblogic.servlet.internal.WebAppServletContext.start(WebAppServletContext.java:2761) at weblogic.servlet.internal.WebAppModule.startContexts(WebAppModule.java:889) at weblogic.servlet.internal.WebAppModule.start(WebAppModule.java:333) at weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:204) at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26) at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:60) at weblogic.application.internal.flow.ScopedModuleDriver.start(ScopedModuleDriver.java:200) at weblogic.application.internal.flow.ModuleListenerInvoker.start(ModuleListenerInvoker.java:117) at weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:204) at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26) at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:60) at weblogic.application.internal.flow.StartModulesFlow.activate(StartModulesFlow.java:26) at weblogic.application.internal.BaseDeployment$2.next(BaseDeployment.java:635) at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26) at weblogic.application.internal.BaseDeployment.activate(BaseDeployment.java:212) at weblogic.application.internal.DeploymentStateChecker.activate(DeploymentStateChecker.java:154) at weblogic.deploy.internal.targetserver.AppContainerInvoker.activate(AppContainerInvoker.java:80) at weblogic.deploy.internal.targetserver.operations.AbstractOperation.activate(AbstractOperation.java:566) at weblogic.deploy.internal.targetserver.operations.ActivateOperation.activateDeployment(ActivateOperation.java:136) at weblogic.deploy.internal.targetserver.operations.ActivateOperation.doCommit(ActivateOperation.java:104) at weblogic.deploy.internal.targetserver.operations.StartOperation.doCommit(StartOperation.java:139) at weblogic.deploy.internal.targetserver.operations.AbstractOperation.commit(AbstractOperation.java:320) at weblogic.deploy.internal.targetserver.DeploymentManager.handleDeploymentCommit(DeploymentManager.java:815) at weblogic.deploy.internal.targetserver.DeploymentManager.activateDeploymentList(DeploymentManager.java:1222) at weblogic.deploy.internal.targetserver.DeploymentManager.handleCommit(DeploymentManager.java:433) at weblogic.deploy.internal.targetserver.DeploymentServiceDispatcher.commit(DeploymentServiceDispatcher.java:161) at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.doCommitCallback(DeploymentReceiverCallbackDeliverer.java:181) at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.access$100(DeploymentReceiverCallbackDeliverer.java:12) at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer$2.run(DeploymentReceiverCallbackDeliverer.java:67) at weblogic.work.ServerWorkManagerImpl$WorkAdapterImpl.run(ServerWorkManagerImpl.java:518) at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209) at weblogic.work.ExecuteThread.run(ExecuteThread.java:181) Caused by: java.lang.LinkageError: Class javax/xml/namespace/QName violates loader constraints at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:620) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124) at weblogic.utils.classloaders.GenericClassLoader.defineClass(GenericClassLoader.java:355) at weblogic.utils.classloaders.GenericClassLoader.findLocalClass(GenericClassLoader.java:294) at weblogic.utils.classloaders.GenericClassLoader.findClass(GenericClassLoader.java:262) at weblogic.utils.classloaders.ChangeAwareClassLoader.findClass(ChangeAwareClassLoader.java:54) at weblogic.utils.classloaders.ChangeAwareClassLoader.loadClass(ChangeAwareClassLoader.java:40) at org.apache.xerces.impl.xs.XMLSchemaValidator.reset(Unknown Source) at org.apache.xerces.parsers.XML11Configuration.configurePipeline(Unknown Source) at org.apache.xerces.parsers.XIncludeAwareParserConfiguration.configurePipeline(Unknown Source) at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) at org.apache.xerces.parsers.XMLParser.parse(Unknown Source) at org.apache.xerces.parsers.DOMParser.parse(Unknown Source) at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown Source) at org.springframework.beans.factory.xml.DefaultDocumentLoader.loadDocument(DefaultDocumentLoader.java:75) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:396) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:342) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:310) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:143) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:178) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:149) at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:124) at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:92) at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:123) at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:423) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:353) at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:255)
看参考资料的分析，因为prefer-web-inf-classes的配置，应用中所有jar的加载时间要早于weblogic中jar的加载时间，导致weblogic中部分类的依赖本来指向容器的结果指向了应用中的类，然后由于兼容问题而报错了，这个原因看起来比较高端，详细原因请看参考资料
3rd
最终解决方法是去掉prefer-web-inf-classes ，改为在weblogic的启动脚本中的classpath中添加导致第一个异常的antlr-2.7.6.jar，即只提前加载应用中这一个jar，再次启动，应用可以起来了
CLASSPATH="/home/wls92/foo/bar/antlr-2.7.6.jar:/home/wls92/foo/bar/xxx.jar: /home/wls92/foo/bar/yyy.jar:
最后，按照惯例，福利一枚奉上
