HTTP Status 500 – Internal Server Error


Type Exception Report

Message An exception occurred processing [projectsDummy.jsp] at line [24]

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

Exception

org.apache.jasper.JasperException: An exception occurred processing [projectsDummy.jsp] at line [24]

21:         int offsetBackward=offset-3;
22:         if(offsetBackward<0)offsetBackward=0;
23: 
24:         int totalProjects=Integer.parseInt(new engineers().getNoOfprojects());
25: 
26:         int offsetForward=offset+3;
27:         if(offsetForward>=totalProjects)offsetForward=totalProjects-3;


Stacktrace:
	org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:610)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:499)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:379)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:327)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:764)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)

Root Cause

java.lang.NumberFormatException: For input string: ""
	java.base/java.lang.NumberFormatException.forInputString(NumberFormatException.java:67)
	java.base/java.lang.Integer.parseInt(Integer.java:678)
	java.base/java.lang.Integer.parseInt(Integer.java:784)
	org.apache.jsp.projectsDummy_jsp._jspService(projectsDummy_jsp.java:142)
	org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:764)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:466)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:379)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:327)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:764)
	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/9.0.65