帶有 Tomcat 和 MyFaces 的 NoClassDefFoundError（消化器）

Question

我很好地使用 Tomcat 和 Eclipse。 現在我無法啟動服務器。 嘗試啟動時出現以下異常。 事情進展順利。 我不知道有什么改變，但顯然有些改變。

Apr 7, 2012 12:28:29 PM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Exception sending context initialized event to listener instance of class org.apache.myfaces.webapp.StartupServletContextListener
java.lang.NoClassDefFoundError: org/apache/commons/digester/Digester
    at org.apache.myfaces.config.impl.digester.DigesterFacesConfigUnmarshallerImpl.<init>(DigesterFacesConfigUnmarshallerImpl.java:42)
    at org.apache.myfaces.config.FacesConfigurator.getUnmarshaller(FacesConfigurator.java:262)
    at org.apache.myfaces.config.FacesConfigurator.feedStandardConfig(FacesConfigurator.java:566)
    at org.apache.myfaces.config.FacesConfigurator.configure(FacesConfigurator.java:487)
    at org.apache.myfaces.webapp.AbstractFacesInitializer.buildConfiguration(AbstractFacesInitializer.java:296)
    at org.apache.myfaces.webapp.Jsp21FacesInitializer.initContainerIntegration(Jsp21FacesInitializer.java:73)
    at org.apache.myfaces.webapp.AbstractFacesInitializer.initFaces(AbstractFacesInitializer.java:118)
    at org.apache.myfaces.webapp.StartupServletContextListener.contextInitialized(StartupServletContextListener.java:111)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4779)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5273)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1566)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1556)
    at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.digester.Digester
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1711)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1556)
    ... 18 more
Apr 7, 2012 12:28:29 PM org.apache.catalina.core.StandardContext startInternal
SEVERE: Error listenerStart
Apr 7, 2012 12:28:29 PM org.apache.catalina.core.StandardContext startInternal
SEVERE: Context [/webApp_appNameT] startup failed due to previous errors
Apr 7, 2012 12:28:29 PM org.apache.catalina.core.StandardContext listenerStop
SEVERE: Exception sending context destroyed event to listener instance of class org.apache.myfaces.webapp.StartupServletContextListener
java.lang.IllegalStateException: No Factories configured for this Application. This happens if the faces-initialization does not work at all - make sure that you properly include all configuration settings necessary for a basic faces application and that all the necessary libs are included. Also check the logging output of your web application and your container for any exceptions!
If you did that and find nothing, the mistake might be due to the fact that you use some special web-containers which do not support registering context-listeners via TLD files and a context listener is not setup in your web.xml.
A typical config looks like this;
<listener>
  <listener-class>org.apache.myfaces.webapp.StartupServletContextListener</listener-class>
</listener>

    at javax.faces.FactoryFinder.getFactory(FactoryFinder.java:172)
    at org.apache.myfaces.context.servlet.FacesContextImplBase.getApplication(FacesContextImplBase.java:131)
    at org.apache.myfaces.webapp.AbstractFacesInitializer._dispatchApplicationEvent(AbstractFacesInitializer.java:239)
    at org.apache.myfaces.webapp.AbstractFacesInitializer.destroyFaces(AbstractFacesInitializer.java:273)
    at org.apache.myfaces.webapp.StartupServletContextListener.contextDestroyed(StartupServletContextListener.java:153)
    at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:4819)
    at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5466)
    at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:160)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1566)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1556)
    at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Apr 7, 2012 12:28:29 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/webApp_appNameT] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@1d98a]) and a value of type [org.apache.myfaces.config.RuntimeConfig] (value [org.apache.myfaces.config.RuntimeConfig@1712651]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
Apr 7, 2012 12:28:29 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/webApp_appNameT] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@18aab40]) and a value of type [org.apache.myfaces.context.servlet.StartupFacesContextImpl] (value [org.apache.myfaces.context.servlet.StartupFacesContextImpl@f102d3]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
Apr 7, 2012 12:28:29 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/webApp_appNameT] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@f07355]) and a value of type [org.apache.myfaces.context.servlet.StartupFacesContextImpl] (value [org.apache.myfaces.context.servlet.StartupFacesContextImpl@23f1bb]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
Apr 7, 2012 12:28:29 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-8080"]
Apr 7, 2012 12:28:29 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-bio-8009"]
Apr 7, 2012 12:28:29 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 1756 ms

Answer 1

我有同樣的問題。 Eclipse 中的 Webapp 和 Tomcat 運行良好，然后 eclipse 凍結； 我不得不用 TaskManager 殺死它。 但是，當我重新啟動 tomcat 時，出現了上述錯誤 java.lang.NoClassDefFoundError: org/apache/commons/digester/Digester。

這沒有意義，因為 webapp 之前運行得很好。 我通過清理 eclipse tomcat webapp 目錄解決了這個問題。

1. Go 到服務器選項卡 -> 右鍵單擊您的 webapp -> 清理模塊目錄。
2. Go 到服務器選項卡 -> 右鍵單擊已使用的 Tomcat 實例 -> 清理...

之后錯誤消失了，webapp 又像以前一樣運行了。

Answer 2

Caused by: java.lang.ClassNotFoundException: org.apache.commons.digester.Digester

這只是告訴您運行時類路徑中缺少提到的 class。 正如 package 名稱所暗示的那樣，它是 Apache Commons Digester，可在http://commons.apache.org/digester 獲得。 如果您下載 JAR 文件並將其放入 webapp 的運行時類路徑所涵蓋的路徑之一，例如/WEB-INF/lib ，那么這個問題應該會消失。