Unable to create a new web application in netbeans- AbstractMethodError

Question

I am trying to create a new web application in Netbeans. When I am deploying , I am getting the below exception. I have not created or added any library. There is just index.jsp saying Hello World. I am using JDK 1.6 and Tomcat 7.

exception

javax.servlet.ServletException: java.lang.AbstractMethodError: javax.servlet.jsp.JspFactory.getJspApplicationContext(Ljavax/servlet/ServletContext;)Ljavax/servlet/jsp/JspApplicationContext; org.apache.jasper.servlet.JspServlet.service(JspServlet.java:343) javax.servlet.http.HttpServlet.service(HttpServlet.java:722) org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)

root cause

java.lang.AbstractMethodError: javax.servlet.jsp.JspFactory.getJspApplicationContext(Ljavax/servlet/ServletContext;)Ljavax/servlet/jsp/JspApplicationContext; org.apache.jsp.index_jsp._jspInit(index_jsp.java:31) org.apache.jasper.runtime.HttpJspBase.init(HttpJspBase.java:49) org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:180) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334) javax.servlet.http.HttpServlet.service(HttpServlet.java:722) org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)

As far as web.xml is concerned, its content is

< ?xml version="1.0" encoding="UTF-8"?>

< web-app xmlns="http://java.sun.com/xml/ns/javaee"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0" >

    < session-config>
        < session-timeout>
            30
        < /session-timeout>
    < /session-config>
< /web-app>

I have searched through a lot. Most of the solution to this error is related to .jar in lib folder I don't have any jars added.

Whats going wrong?

Answer 1

AbstractMethodError is generally thrown at runtime when the definition of some class has incompatibly changed since the currently executing method was last compiled.It is also generally caught by the compiler. The .jar file containing the class javax.servlet.jsp.JspFactory is creating this exception. Check jsp-api.jar in your tomcat lib folder and verify the correct one is in the classpath. Ensure that there is no other version of .jar file having the same class is causing this issue.