HTTP Status 500 – Internal Server Error


Type Exception Report

Message An exception occurred processing [categoria.jsp] at line [34]

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

Exception

org.apache.jasper.JasperException: An exception occurred processing [categoria.jsp] at line [34]

31:             <%
32:                 String cat = model.Connexio.value(paragrafs.categoria_actual);
33:                 Pagina p = query.sql_query("select * from categoria(" + cat +")");
34:                 int nf = p.n / 3;
35:                 if (p.n % 3 > 0) nf++;
36:                 int k=0;
37:                 for (int i=0; i<nf; i++) {


Stacktrace:
	org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:599)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:488)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:380)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:328)
	jakarta.servlet.http.HttpServlet.service(HttpServlet.java:814)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)

Root Cause

java.lang.NullPointerException
	org.apache.jsp.categoria_jsp._jspService(categoria_jsp.java:173)
	org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	jakarta.servlet.http.HttpServlet.service(HttpServlet.java:814)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:456)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:380)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:328)
	jakarta.servlet.http.HttpServlet.service(HttpServlet.java:814)
	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/10.1.4