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java.lang.NoClassDefFoundError: org/apache/log4j/Logger

 
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hi ,i m new to log4j and i m implementing it in struts2 ,but this error is creating problem for me.in place of logger, system.out.println is working for me but logger is creating error ,so please guide me solve the problem.my stack trace is

java.lang.NoClassDefFoundError: org/apache/log4j/Logger
at com.action.indexpage.<clinit>(indexpage.java:17)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at java.lang.Class.newInstance0(Class.java:355)
at java.lang.Class.newInstance(Class.java:308)
at com.opensymphony.xwork2.ObjectFactory.buildBean(ObjectFactory.java:130)
at com.opensymphony.xwork2.ObjectFactory.buildBean(ObjectFactory.java:161)
at com.opensymphony.xwork2.ObjectFactory.buildBean(ObjectFactory.java:150)
at com.opensymphony.xwork2.ObjectFactory.buildAction(ObjectFactory.java:120)
at com.opensymphony.xwork2.DefaultActionInvocation.createAction(DefaultActionInvocation.java:299)
at com.opensymphony.xwork2.DefaultActionInvocation.init(DefaultActionInvocation.java:399)
at com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:198)
at org.apache.struts2.impl.StrutsActionProxy.prepare(StrutsActionProxy.java:61)
at org.apache.struts2.impl.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:39)
at com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:58)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:475)
at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1254)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:481)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:516)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:230)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:956)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:411)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:188)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:891)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:247)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:151)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:114)
at org.eclipse.jetty.server.Server.handle(Server.java:353)
at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:598)
at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:1059)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:590)
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:212)
at org.eclipse.jetty.server.HttpConnection.handle(HttpConnection.java:427)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:510)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.access$000(SelectChannelEndPoint.java:34)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:40)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:450)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.ClassNotFoundException: org.apache.log4j.Logger
at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:244)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:230)
at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:417)
at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:370)
... 44 more

Caused by:

java.lang.ClassNotFoundException: org.apache.log4j.Logger
at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:244)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:230)
at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:417)
at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:370)
at com.action.indexpage.<clinit>(indexpage.java:17)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at java.lang.Class.newInstance0(Class.java:355)
at java.lang.Class.newInstance(Class.java:308)
at com.opensymphony.xwork2.ObjectFactory.buildBean(ObjectFactory.java:130)
at com.opensymphony.xwork2.ObjectFactory.buildBean(ObjectFactory.java:161)
at com.opensymphony.xwork2.ObjectFactory.buildBean(ObjectFactory.java:150)
at com.opensymphony.xwork2.ObjectFactory.buildAction(ObjectFactory.java:120)
at com.opensymphony.xwork2.DefaultActionInvocation.createAction(DefaultActionInvocation.java:299)
at com.opensymphony.xwork2.DefaultActionInvocation.init(DefaultActionInvocation.java:399)
at com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:198)
at org.apache.struts2.impl.StrutsActionProxy.prepare(StrutsActionProxy.java:61)
at org.apache.struts2.impl.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:39)
at com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:58)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:475)
at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1254)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:481)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:516)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:230)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:956)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:411)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:188)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:891)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:247)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:151)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:114)
at org.eclipse.jetty.server.Server.handle(Server.java:353)
at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:598)
at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:1059)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:590)
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:212)
at org.eclipse.jetty.server.HttpConnection.handle(HttpConnection.java:427)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:510)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.access$000(SelectChannelEndPoint.java:34)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:40)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:450)
at java.lang.Thread.run(Thread.java:662)

thanks in advance
 
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Do you have the Log4J JAR file in your classpath (WEB-INF/lib)?
 
shekhar john
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yes i putted it on my lib, i m using maven for our project
 
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