Between statment I have a strange error (error 500)

Question

Hi all,
This is my problem : I made a "between query" to a oracle database which contains dates values as long. My query is working fine when I put an space like 1 months (ie : between the 06/01/2001 and the 07/01/2001), i recieved around 500 records. But if I stretch the space (as for ie one year) I received an internal error 500 with a root cause nullpointerexception.
I'll put th returned error message. I'm really disappointed and I can't see how to fix this problem (for the moment).
Hope that someone can help me
Thanks in advance
STF
Here is the code
Error: 500
Location: /examples/jsp/Rmdy/CountTab.jsp
Internal Servlet Error:
Root cause:
java.lang.NullPointerException
at jsp.Rmdy._0002fjsp_0002fRmdy_0002fCountTab_0002ejspCountTab_jsp_0._jspService(_0002fjsp_0002fRmdy_0002fCountTab_0002ejspCountTab_jsp_0.java:268)
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$JspServletWrapper.service(JspServlet.java:177)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:318)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:391)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:404)
at org.apache.tomcat.core.Handler.service(Handler.java:286)
at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:797)
at org.apache.tomcat.core.ContextManager.service(ContextManager.java:743)
at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:210)
at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416)
at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:498)
at java.lang.Thread.run(Thread.java:484)a:484)

Answer 1

Hi There
I'm not sure from your description what the problem is, but you should be able to find out what is causing the NullPointerException very easily by finding the compiled JSP's (for example, in Tomcat they are stored under <tomcat>/work/<app-name>).
Then find the exact source file (given in the stack trace). Bear in mind if there are two versions of a file with the same name, they will have version numbers added onto the filename - make sure you edit the latest version.
Now edit the file, go to the line number given in the stack trace, and you'll hopefully see what is giving you the null pointer.
My guess is probably the ResultSet is coming back as null, and you're not doing a test for null before doing rs.next() for example.
Hope this helps
Richard