This is an NPE in your errordetails.jsp page. 

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Scott Stark
Chief Technology Officer
JBoss Group, LLC
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________________________________

From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Maffeo
Gaetano
Sent: Wednesday, January 28, 2004 8:19 AM
To: [EMAIL PROTECTED]
Subject: [JBoss-user] Sometimes i get the following error:



In the attachement there is the JSP file 
Somebody could help me? 

many thanks in advance 
gaetano 


2004-01-26 09:53:21,010 ERROR [org.jboss.web.localhost.Engine]
ApplicationDispatcher[/protocollo] Servlet.service() for servlet jsp
threw exception

org.apache.jasper.JasperException 
        at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.ja
va: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(ApplicationDispatc
her.java:684) 
        at
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDisp
atcher.java:432) 
        at
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispat
cher.java:356) 
        at
org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:4
30) 
        at
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContex
tImpl.java:501) 
        at org.apache.jsp.logon_jsp._jspService(logon_jsp.java:241) 
        at bsc.jsp.PostBackPageSupport.service(Unknown Source) 
        at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.ja
va: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.ApplicationFilterChain.internalDoFilter(Applica
tionFilterChain.java:247) 
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt
erChain.java:193) 
        at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValv
e.java:256) 
        at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:643) 
        at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:4
80) 
        at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995) 
        at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValv
e.java:191) 
        at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:643) 
        at
org.jboss.web.tomcat.security.JBossSecurityMgrRealm.invoke(JBossSecurity
MgrRealm.java:220) 
        at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:641) 
        at
org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.ja
va:246) 
        at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:641) 
        at
org.jboss.web.tomcat.tc4.statistics.ContainerStatsValve.invoke(Container
StatsValve.java:76) 
        at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:641) 
        at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:4
80) 
        at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995) 
        at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:241
7) 
        at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java
:180) 
        at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:643) 
        at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherVa
lve.java:171) 
        at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:641) 
        at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java
:172) 
        at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:641) 
        at
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAs
sociationValve.java:65) 
        at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:641) 
        at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:577
) 
        at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:641) 
        at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:4
80) 
        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$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:643) 
        at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:4
80) 
        at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995) 
        at
org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:197) 
        at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:78
1) 
        at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processC
onnection(Http11Protocol.java:549) 
        at
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:60
5) 
        at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool
.java:677) 
        at java.lang.Thread.run(Thread.java:534) 
2004-01-26 09:53:21,018 ERROR [org.jboss.web.localhost.Engine] -----
Root Cause ----- 
java.lang.NullPointerException 
        at
org.apache.jsp.errordetails_jsp._jspService(errordetails_jsp.java:263) 
        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.ja
va:210) 
        at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)

        at
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241) 



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