用老项目weblogic + jsf 启动服务时报错
weblogic.application.ModuleException: java.lang.IllegalStateException: Could not find backup for factory javax.faces.context.FacesContextFactory. at weblogic.application.internal.ExtensibleModuleWrapper.start(ExtensibleModuleWrapper.java:140) at weblogic.application.internal.flow.ModuleListenerInvoker.start(ModuleListenerInvoker.java:124) at weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:216) at weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:211) at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:42) Truncated. see log file for complete stacktrace Caused By: com.sun.faces.config.ConfigurationException: CONFIGURATION FAILED! com.oracle.injection.integration.jsf.WeblogicFacesConfigResourceProvider cannot be cast to com.sun.faces.spi.ConfigurationResourceProvider <启动时没有正确初始化应用程序，无法找到工厂：javax.faces.context.FacesContextFactory. Attempting to find backup.>
根据错误信息知道WeblogicFacesConfigResourceProvider不能转换成ConfigurationResourceProvider
可能是jsf的实现包有问题，jsf-api-2.2.20.jar 和 jsf-impl-2.2.20.jar两个，这两个的版本号必须要一致。有没有多余的不同版本，我是这种情况，有重复的jar包。删除重新引入jar就可以启动成功了
