Hi
To debug a JSP you have to search for the servlet file which your Application
server has generated.In Websphere it is alled as an xjsp file.I dont know
which server which you are using but it should have the same name as your JSP.
then open that file and go to the Line number as given n the error message
when you are trying to deploy your jsp
This will gve you the exact line where the error has occred
Hope This helps
Girish
>===== Original Message From A mailing list about Java Server Pages
specification and reference <[EMAIL PROTECTED]> =====
>hi
> does anyone have ideas to debug jsp error.
> i am confused.
>
>
> i got error message like following. and donot know
> where the error occurred in my jsp file?
>
>
>thanks alot
>
>Error: 500
>Location: /usertable/userlist.jsp
>Internal Servlet Error:
>
>org.apache.jasper.JasperException: Unable to compile class for JSP
> at
org.apache.jasper.servlet.JspServlet.doLoadJSP(JspServlet.java:476)
> at
>org.apache.jasper.servlet.JasperLoader12.loadJSP(JasperLoader12.java:146)
> at org.apache.jasper.servlet.JspServlet.loadJSP(JspServlet.java:433)
> at
>org.apache.jasper.servlet.JspServlet$JspServletWrapper.loadIfNecessary(JspSe
>rvlet.java:152)
> at
>org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.ja
>va:164)
> 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.http.HttpConnectionHandler.processConnection(HttpC
>onnectionHandler.java:210)
> at
>org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416)
> at
>org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:498)
> at java.lang.Thread.run(Thread.java:484)
>
>Root cause:
>java.lang.NullPointerException
> at
>org.apache.jasper.compiler.TagBeginGenerator.generateSetters(TagBeginGenerat
>or.java:196)
> at
>org.apache.jasper.compiler.TagBeginGenerator.generateServiceMethodStatements
>(TagBeginGenerator.java:291)
> at
>org.apache.jasper.compiler.TagBeginGenerator.generate(TagBeginGenerator.java
>:360)
> at
>org.apache.jasper.compiler.JspParseEventListener$GeneratorWrapper.generate(J
>spParseEventListener.java:773)
> at
>org.apache.jasper.compiler.JspParseEventListener.generateAll(JspParseEventLi
>stener.java:220)
> at
>org.apache.jasper.compiler.JspParseEventListener.endPageProcessing(JspParseE
>ventListener.java:175)
> at org.apache.jasper.compiler.Compiler.compile(Compiler.java:183)
> at
org.apache.jasper.servlet.JspServlet.doLoadJSP(JspServlet.java:462)
> at
>org.apache.jasper.servlet.JasperLoader12.loadJSP(JasperLoader12.java:146)
> at org.apache.jasper.servlet.JspServlet.loadJSP(JspServlet.java:433)
> at
>org.apache.jasper.servlet.JspServlet$JspServletWrapper.loadIfNecessary(JspSe
>rvlet.java:152)
> at
>org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.ja
>va:164)
> 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.http.HttpConnectionHandler.processConnection(HttpC
>onnectionHandler.java:210)
> 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)
>
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