HTTP Status 500 – Internal Server Error


Type Exception Report

Message Unable to compile class for JSP:

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

Exception

org.apache.jasper.JasperException: Unable to compile class for JSP: 

An error occurred at line: [4] in the jsp file: [/sql.jsp]
SQL_URL cannot be resolved to a variable
1: <%@ page import="java.sql.*" %>
2: 
3: <%
4: String     connectionURL = SQL_URL;
5: Connection connection    = null;
6: Statement  sql           = null;
7: ResultSet  rs            = null;


An error occurred at line: [107] in the jsp file: [/overall.jsp]
The type javax.servlet.jsp.JspWriter cannot be resolved. It is indirectly referenced from required type util.DisplayUtil
104: //while(rs.next())
105: //  out.println(rs.getString(1) + " " + rs.getString(3) + " " + rs.getString(4) + "<br>");
106: 
107: DisplayUtil.draw_table(out, rs, page_filename, "cellspacing=1 bgcolor=black border=0", col_sortable, col_class, col_align, col_name, col_desc, col_type);
108: 
109: %>
110: <font size=-2><i>Click a column header to sort the table.</i></font>


An error occurred at line: [107] in the jsp file: [/overall.jsp]
The method draw_table(JspWriter, ResultSet, String, String, boolean[], String[], String[], String[], String[], String[]) from the type DisplayUtil refers to the missing type JspWriter
104: //while(rs.next())
105: //  out.println(rs.getString(1) + " " + rs.getString(3) + " " + rs.getString(4) + "<br>");
106: 
107: DisplayUtil.draw_table(out, rs, page_filename, "cellspacing=1 bgcolor=black border=0", col_sortable, col_class, col_align, col_name, col_desc, col_type);
108: 
109: %>
110: <font size=-2><i>Click a column header to sort the table.</i></font>


Stacktrace:
	org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:102)
	org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:214)
	org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:524)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:402)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:372)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:356)
	org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:603)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:396)
	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:658)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)

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


Apache Tomcat/10.1.20