Re: JSP/MySQL debugging issue

I just posted what I hope is some helpful tips over on 
comp.lang.java.programmer.

Damon Getsman wrote:
> More information in this post...  Looks like the MySQL bit was fooling
> me; that's a nonfatal error that likely has been there since before I
> modified anything in this code.
> 
> Is there anything in this snippet of error log that can help me locate
> my error?  Like what line # in timesheet.jsp or index.jsp it's dying
> on here?  Or maybe even something subtle that I'm missing like follow
> around one of the myBean.intBean objects to locate the error in one of
> these files?
> 
> I really dislike the way tomcat re****ts errors.
> 
> -Damon
> 
> PS I am posting this new information to the newsgroup you recommended
> as well if it is, indeed, more appropriate there.
> 
> Sep 17, 2008 1:49:02 PM org.apache.catalina.core.ApplicationDispatcher
> invoke
> SEVERE: Servlet.service() for servlet jsp threw exception
> java.lang.NumberFormatException: null
> 	at java.lang.Integer.parseInt(Integer.java:415)
> 	at java.lang.Integer.parseInt(Integer.java:497)
> 	at org.apache.jsp.timesheet_jsp._jspService(timesheet_jsp.java:862)
> 	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
> 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
> 	at
>
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:
> 374)
> 	at
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:
> 337)
> 	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
> 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
> 	at
>
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:
> 290)
> 	at
>
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:
> 206)
> 	at
>
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:
> 630)
> 	at
>
org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:
> 535)
> 	at
>
org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:
> 472)
> 	at
>
org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:
> 968)
> 	at
>
org.apache.jsp.index_jsp._jspx_meth_c_005fotherwise_005f0(index_jsp.java:
> 1521)
> 	at
> org.apache.jsp.index_jsp._jspx_meth_c_005fchoose_005f0(index_jsp.java:
> 1423)
> 	at org.apache.jsp.index_jsp._jspService(index_jsp.java:145)
> 	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
> 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
> 	at
>
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:
> 374)
> 	at
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:
> 337)
> 	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
> 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
> 	at
>
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:
> 290)
> 	at
>
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:
> 206)
> 	at
>
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:
> 233)
> 	at
>
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:
> 175)
> 	at
>
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:
> 128)
> 	at
>
org.apache.catalina.valves.ErrorRe****tValve.invoke(ErrorRe****tValve.java:
> 102)
> 	at
>
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:
> 109)
> 	at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:
> 286)
> 	at
> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:
> 844)
> 	at org.apache.coyote.http11.Http11Protocol
> $Http11ConnectionHandler.process(Http11Protocol.java:583)
> 	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:
> 447)
> 	at java.lang.Thread.run(Thread.java:619)