What should I do for this NoClassDefFoundError?

Question

INFO: validateJarFile(C:\Users\smart\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\ konzernauto1\WEB-INF\lib\servlet-api.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class
Feb 10, 2014 12:40:20 PM org.apache.catalina.core.StandardContext filterStart
SEVERE: Exception starting filter struts2
java.lang.NoClassDefFoundError: com/opensymphony/xwork2/config/FileManagerProvider
    at org.apache.struts2.dispatcher.Dispatcher.init_FileManager(Dispatcher.java:352)
    at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:481)
    at org.apache.struts2.dispatcher.FilterDispatcher.init(FilterDispatcher.java:193)
    at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:281)
    at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:262)
    at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:107)
    at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4746)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5399)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: com.opensymphony.xwork2.config.FileManagerProvider
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1714)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
    ... 15 more

Seems like a required class is missing .. "FileManagerProvider". — user2864740, Feb 10 '14 at 07:17
jar files are missing make sure you have included all the jar fiels of proper version — Rookie007, Feb 10 '14 at 07:48
i ve added all the required jar files. Changed their versions and checked. Still the same error — jaseem, Feb 10 '14 at 08:14
You are missing a dependency, just like the error states. Also, you must not deploy your own servlet api jar. — Dave Newton, Feb 10 '14 at 10:15
possible duplicate of [Error: Servlet Jar not Loaded... Offending class: javax/servlet/Servlet.class](http://stackoverflow.com/questions/1993493/error-servlet-jar-not-loaded-offending-class-javax-servlet-servlet-class) — Raedwald, Feb 13 '15 at 13:12

score 0 · Answer 1 · answered Feb 10 '14 at 10:11

The INFO message simple tells you that Tomcat did not load the Servlet API from your app because it exists twice or its not the correct version. The SEVERE message tells you that you are missing a class in your classpath (NoClassDefFoundError). The class is called FileManagerProvider an is included in "xwork-core.jar".

What should I do for this NoClassDefFoundError?

1 Answers1