I am starting out learning Struts. I took example application logon.war from Husted's Struts in Action book and it deployed fine. However, when I run application I get errors. If I submit with input fields filled out I get a LogonSubmit.do page, but it's blank. If I submit without filling in input fields I get the following:
2005-01-13 17:10:41,636 ERROR [org.jboss.web.localhost.Engine] StandardWrapperValve[action]: Servlet.service() for servlet action threw exception
org.apache.jasper.JasperException
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:254)
        at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:684)
        at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:432)
        at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:356)
        at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1056)
        at org.apache.struts.action.RequestProcessor.internalModuleRelativeForward(RequestProcessor.java:994)
        at org.apache.struts.action.RequestProcessor.processValidate(RequestProcessor.java:959)
        at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:206)
        at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1164)
        at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:415)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
        at org.jboss.web.tomcat.security.JBossSecurityMgrRealm.invoke(JBossSecurityMgrRealm.java:220)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
        at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
        at org.jboss.web.tomcat.tc4.statistics.ContainerStatsValve.invoke(ContainerStatsValve.java:76)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
        at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2417)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
        at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
        at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:65)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:577)
 at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
        at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:197)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:781)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:549)
        at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:605)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:677)
        at java.lang.Thread.run(Thread.java:534)
2005-01-13 17:10:41,637 ERROR [org.jboss.web.localhost.Engine] ----- Root Cause -----
javax.servlet.ServletException
        at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:533)
        at org.apache.jsp.Logon_jsp._jspService(Logon_jsp.java:85)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:137)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:210)
        at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:684)
        at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:432)
        at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:356)
        at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1056)
        at org.apache.struts.action.RequestProcessor.internalModuleRelativeForward(RequestProcessor.java:994)
        at org.apache.struts.action.RequestProcessor.processValidate(RequestProcessor.java:959)
        at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:206)
        at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1164)
        at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:415)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
        at org.jboss.web.tomcat.security.JBossSecurityMgrRealm.invoke(JBossSecurityMgrRealm.java:220)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
        at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
        at org.jboss.web.tomcat.tc4.statistics.ContainerStatsValve.invoke(ContainerStatsValve.java:76)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
        at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2417)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
        at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
        at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:65)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:577)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
        at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:197)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:781)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:549)
        at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:605)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:677)
        at java.lang.Thread.run(Thread.java:534)

Sorry if this is too long, but I have no idea what's going on.

thanks a lot,
Alex

This exception stack trace doesn't reveal what's the actual problem is. You have to look in the tomcat log files to further diagnose the problem. Please post the log file stack trace if any

where can I check these logs?

ok, got it. When I submit form without any values in text fields and get an exception, in tomcat log I see:

             192.9.200.230 - - [14/Jan/2005:16:47:22 -0500] "POST /log/QuerySubmit.do HTTP/1.1" 500 10707

When I fill something into the input fields I get:

              192.9.200.230 - - [14/Jan/2005:16:48:17 -0500] "POST /log/QuerySubmit.do HTTP/1.1" 200 -

Alex