This question already has an answer here:
When I try to browse "localhost:8080" on myeclipse, I get the following error:
type Exception report
message java.lang.NoClassDefFoundError: Could not initialize class org.apache.jasper.el.ELContextImpl
description The server encountered an internal error that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: java.lang.NoClassDefFoundError: Could not initialize class org.apache.jasper.el.ELContextImpl
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:343)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
root cause
java.lang.NoClassDefFoundError: Could not initialize class org.apache.jasper.el.ELContextImpl
org.apache.jasper.compiler.Validator$ValidateVisitor.prepareExpression(Validator.java:1568)
org.apache.jasper.compiler.Validator$ValidateVisitor.visit(Validator.java:747)
org.apache.jasper.compiler.Node$ELExpression.accept(Node.java:954)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2376)
org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2428)
org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2434)
org.apache.jasper.compiler.Node$Root.accept(Node.java:475)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2376)
org.apache.jasper.compiler.Validator.validateExDirectives(Validator.java:1795)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:217)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:373)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:353)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:340)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:646)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)
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:728)
Are you trying to run a Web app on Jetty server? The error NoClassDefFoundError means you do not have the jar file required to run that code.
Here is the stackoverflow question on the same issue.
org.apache.jasper.el.ELContextImpl cannot be cast to org.apache.jasper.runtime.ELContextImpl
If you are using the Eclipse IDE, I recommend you to download the Eclipse Jetty plugin
https://code.google.com/p/run-jetty-run/
or in your eclipse under help -> Market place -> enter 'jetty' or 'jetty plugin' then download run-jetty-run plugin
In eclipse when there is a HTTP Status 500 - java.lang.NoClassDefFoundError in developing web application whether tomcat or jetty etc make sure to put the needed .jar files in the lib folder under the WEB-INF folder (/WEB-INF/lib) to solve the error
I had the similar issue while trying to access
localhost:8080
. This is happening because tomcat is able to detect more than 1 copy of jasper.jar jsp-api,jasper-el.The issue is due to conflicting jars.
Please remove the above jars from
java/jdk(version)/jre/lib/ext
Restart the tomcat and it will work fine.