java.lang.reflect.UndeclaredThrowableException at $Proxy0.getStudents(Unknown Source) at sample.web.StudentListAction.getPageIterator(StudentListAction.java:22) at com.jdon.strutsutil.ModelListAction.execute(ModelListAction.java:69) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) at javax.servlet.http.HttpServlet.service(HttpServlet.java:689) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:868) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:663) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) at java.lang.Thread.run(Thread.java:595) Caused by: java.lang.Throwable: java.lang.Throwable: java.lang.Throwable: java.lang.NullPointerException at com.jdon.bussinessproxy.dyncproxy.DynamicProxyWeaving.invoke(DynamicProxyWeaving.java:68) ... 23 more Caused by: java.lang.Throwable: java.lang.Throwable: java.lang.NullPointerException at com.jdon.aop.AopClient.invoke(AopClient.java:100) at com.jdon.bussinessproxy.dyncproxy.DynamicProxyWeaving.invoke(DynamicProxyWeaving.java:62) ... 23 more Caused by: java.lang.Throwable: java.lang.NullPointerException at com.jdon.aop.reflection.ProxyMethodInvocation.methodInvoke(ProxyMethodInvocation.java:112) at com.jdon.aop.reflection.ProxyMethodInvocation.proceed(ProxyMethodInvocation.java:76) at com.jdon.aop.interceptor.SessionContextInterceptor.invoke(SessionContextInterceptor.java:76) at com.jdon.aop.reflection.ProxyMethodInvocation.proceed(ProxyMethodInvocation.java:84) at com.jdon.aop.interceptor.StatefulInterceptor.invoke(StatefulInterceptor.java:82) at com.jdon.aop.reflection.ProxyMethodInvocation.proceed(ProxyMethodInvocation.java:84) at com.jdon.aop.interceptor.PoolInterceptor.invoke(PoolInterceptor.java:91) at com.jdon.aop.reflection.ProxyMethodInvocation.proceed(ProxyMethodInvocation.java:84) at com.jdon.aop.interceptor.CacheInterceptor.invoke(CacheInterceptor.java:58) at com.jdon.aop.reflection.ProxyMethodInvocation.proceed(ProxyMethodInvocation.java:84) at com.jdon.aop.AopClient.invoke(AopClient.java:95) ... 24 more Caused by: java.lang.NullPointerException at com.jdon.aop.reflection.ProxyMethodInvocation.methodInvoke(ProxyMethodInvocation.java:100) ... 34 more