I think that it's because the session object uses a hashtable to store
you objects and you are trying to store a null reference.
Bye
----- Mensaje Original -----
De: "Robuschi (Delfi)" <[EMAIL PROTECTED]>
Fecha: Jueves, Enero 18, 2001 9:35 am
Asunto: Hashtable error when I don't use it
> Hello everybody!!
>
> I have a strange error:
> in the first page of my application, I make few JSP instructions:
> I use a bean that reads from a text file and I put some session
> variables.I'm sure that I don't use Hash tables in that code.
> When I run it (on Tomcat) the strange error is:
>
> Error: 500
> Location: /wds/index.jsp
> Internal Servlet Error:
>
> javax.servlet.ServletException
> at
> org.apache.jasper.runtime.PageContextImpl.handlePageException
(PageContextImp
> l.java:459)
> at
> _0002findex_0002ejspindex_jsp_1._jspService
(_0002findex_0002ejspindex_jsp_1.
> java:118)
> at
> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
> at
> org.apache.jasper.servlet.JspServlet$JspServletWrapper.service
(JspServlet.ja
> va:177)
> at
> org.apache.jasper.servlet.JspServlet.serviceJspFile
(JspServlet.java:318) at org.apache.jasper.servlet.JspServlet.service
(JspServlet.java:391)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
> at
> org.apache.tomcat.core.ServletWrapper.doService
(ServletWrapper.java:404) at org.apache.tomcat.core.Handler.service
(Handler.java:286)
> at
> org.apache.tomcat.core.ServletWrapper.service
(ServletWrapper.java:372) at
> org.apache.tomcat.core.ContextManager.internalService
(ContextManager.java:79
> 7)
> at
> org.apache.tomcat.core.ContextManager.service
(ContextManager.java:743) at
>
org.apache.tomcat.service.connector.Ajp12ConnectionHandler.processConnec
tion
> (Ajp12ConnectionHandler.java:166)
> at
> org.apache.tomcat.service.TcpWorkerThread.runIt
(PoolTcpEndpoint.java:416)
> at
> org.apache.tomcat.util.ThreadPool$ControlRunnable.run
(ThreadPool.java:498)
> at java.lang.Thread.run(Thread.java:484)
>
> Root cause:
> java.lang.NullPointerException
> at java.util.Hashtable.put(Hashtable.java:380)
> at
> org.apache.tomcat.session.StandardSession.setAttribute
(StandardSession.java:
> 723)
> at
> org.apache.tomcat.session.StandardSession.putValue
(StandardSession.java:629)
> at
> org.apache.tomcat.facade.HttpSessionFacade.putValue
(HttpSessionFacade.java:1
> 47)
> at
> _0002findex_0002ejspindex_jsp_1._jspService
(_0002findex_0002ejspindex_jsp_1.
> java:89)
> at
> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
> at
> org.apache.jasper.servlet.JspServlet$JspServletWrapper.service
(JspServlet.ja
> va:177)
> at
> org.apache.jasper.servlet.JspServlet.serviceJspFile
(JspServlet.java:318) at org.apache.jasper.servlet.JspServlet.service
(JspServlet.java:391)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
> at
> org.apache.tomcat.core.ServletWrapper.doService
(ServletWrapper.java:404) at org.apache.tomcat.core.Handler.service
(Handler.java:286)
> at
> org.apache.tomcat.core.ServletWrapper.service
(ServletWrapper.java:372) at
> org.apache.tomcat.core.ContextManager.internalService
(ContextManager.java:79
> 7)
> at
> org.apache.tomcat.core.ContextManager.service
(ContextManager.java:743) at
>
org.apache.tomcat.service.connector.Ajp12ConnectionHandler.processConnec
tion
> (Ajp12ConnectionHandler.java:166)
> at
> org.apache.tomcat.service.TcpWorkerThread.runIt
(PoolTcpEndpoint.java:416)
> at
> org.apache.tomcat.util.ThreadPool$ControlRunnable.run
(ThreadPool.java:498)
> at java.lang.Thread.run(Thread.java:484)
>
> Why I have a NullPointerException on HashTable when I don't use Hash
> Tables??????
> Does anybody has experienced this error??????
> What is it????????
>
> Many thanks in advance to everybody!!!!!!!!!!!!!!!!
>
> Robuschi Roberto -------------------- Delfi srl
> P.za Ravenet 1/b - 43100 PARMA
> Tel. 0521/932474 Fax 0521/989045
> [EMAIL PROTECTED] --- http://www.delfi.it
>
>
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>
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