Simple question regarding Body Tags

[Mufaddal Khumri]

I am using Tomcat 4.1.29

I have a bodytag called Page

In the constructor of this Tag I do this:

                HttpSession session = null;
                
                try
                {
                        session = pageContext.getSession();
                }
                catch(Exception ex)
                {
                        ex.printStackTrace();
                }
When I use this tag on a JSP page and try to access this jsp page, I  
get the following:

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.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$StandardPipelineValveContext.i 
nvokeNext(StandardPipeline.java:643)
        at  
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java: 
480)
        at  
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
        at  
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValv 
e.java:191)
        at  
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i 
nvokeNext(StandardPipeline.java:643)
        at  
org.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$StandardPipelineValveContext.i 
nvokeNext(StandardPipeline.java:643)
        at  
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherVa 
lve.java:171)
        at  
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i 
nvokeNext(StandardPipeline.java:641)
        at  
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java 
:172)
        at  
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i 
nvokeNext(StandardPipeline.java:641)
        at  
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java: 
577)
        at  
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i 
nvokeNext(StandardPipeline.java:641)
        at  
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java: 
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$StandardPipelineValveContext.i 
nvokeNext(StandardPipeline.java:643)
        at  
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java: 
480)
        at  
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
        at  
org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:193)
        at  
org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:309)
        at  
org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:387)
        at  
org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:673)
        at  
org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java: 
615)
        at  
org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:786)
        at  
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool 
.java:666)
        at java.lang.Thread.run(Thread.java:552)

root cause
javax.servlet.ServletException
        at  
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContex 
tImpl.java:531)
        at org.apache.jsp.Home_jsp._jspService(Home_jsp.java:276)
        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)
        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$StandardPipelineValveContext.i 
nvokeNext(StandardPipeline.java:643)
        at  
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java: 
480)
        at  
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
        at  
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValv 
e.java:191)
        at  
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i 
nvokeNext(StandardPipeline.java:643)
        at  
org.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$StandardPipelineValveContext.i 
nvokeNext(StandardPipeline.java:643)
        at  
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherVa 
lve.java:171)
        at  
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i 
nvokeNext(StandardPipeline.java:641)
        at  
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java 
:172)
        at  
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i 
nvokeNext(StandardPipeline.java:641)
        at  
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java: 
577)
        at  
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i 
nvokeNext(StandardPipeline.java:641)
        at  
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java: 
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$StandardPipelineValveContext.i 
nvokeNext(StandardPipeline.java:643)
        at  
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java: 
480)
        at  
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
        at  
org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:193)
        at  
org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:309)
        at  
org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:387)
        at  
org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:673)
        at  
org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java: 
615)
        at  
org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:786)
        at  
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool 
.java:666)
        at java.lang.Thread.run(Thread.java:552)

If I comment this line: // HttpSession session =  
pageContext.getSession(); in the Page tag constructor everything works  
fine.

How do I get the session in the tags constructor? why am i getting the  
exception? Any Ideas?

Regards