HTTP Status 500 – Internal Server Error


Type Exception Report

Message An exception occurred processing [voorjaarstoernooi/top_10_tabel.jsp] at line [11]

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

org.apache.jasper.JasperException: An exception occurred processing [voorjaarstoernooi/top_10_tabel.jsp] at line [11]

8: <%@ include file="model/Partij.jsp" %>
9: 
10: <%
11: 	int id = Integer.parseInt(request.getParameter("jaar"));
12: 	int aantal = 10;
13: 
14: 	DatabaseConnection database = DatabaseManager.borrowConnection("wf_voorjaarstoernooi");


Stacktrace:
	org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:593)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:482)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:386)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:330)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)

Root Cause

java.lang.NumberFormatException: null
	java.base/java.lang.Integer.parseInt(Integer.java:614)
	java.base/java.lang.Integer.parseInt(Integer.java:770)
	org.apache.jsp.voorjaarstoernooi.top_005f10_005ftabel_jsp._jspService(top_005f10_005ftabel_jsp.java:781)
	org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:444)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:386)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:330)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)

Note The full stack trace of the root cause is available in the server logs.


Apache Tomcat/9.0.6