some question about jsp resultset?(100分)

I use resultset.absolute(int row)
and resultset.relative(int rows)
but there is some error message:
Error: 500
Location: /examples/jsp/zhouhe/movetoaryrow/showone.jsp
Internal Servlet Error:
java.lang.IllegalStateException: Response has already been committed at org.apache.tomcat.core.HttpServletResponseFacade.sendError(HttpServletResponseFacade.java:157)
at org.apache.jasper.runtime.JspServlet.unknownException(JspServlet.java:299)
at org.apache.jasper.runtime.JspServlet.service(JspServlet.java, Compiled Code)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.tomcat.core.ServletWrapper.handleRequest(ServletWrapper.java, Compiled Code)
at org.apache.tomcat.core.ContextManager.service(ContextManager.java:559)
at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:160)
at org.apache.tomcat.service.TcpConnectionThread.run(SimpleTcpEndpoint.java:338)
at java.lang.Thread.run(Thread.java:479)

what is it mean?? help me please!!

我的也是。运行那个HI.JSP 出现 error:500 Unable to compile class for jsp.
但查看它的类子以可以。 不知点解。

JDBCdo
not support resultset.move function:-(
I think maybe work if use M$'s JDK, JDBC-ODBC connector.

接受答案了.