Jsp failed to execute in Netbeans

Hi all!!!

i am facing this execution problem in jsp. i am using netbeans for development. I am getting the following 500 status error.

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: java.lang.ClassCastException: org.apache.catalina.util.DefaultAnnotationProcessor cannot be cast to org.apache.AnnotationProcessor
org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:156)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:329)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)

root cause

java.lang.ClassCastException: org.apache.catalina.util.DefaultAnnotationProcessor cannot be cast to org.apache.AnnotationProcessor
org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:146)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:329)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)

please help me with this..

thanks in advance

What is your application flow? What are the content of the JSP you are trying to access? Please TellTheDetails.

i am writing just simple jsp code using expressions and scriptlets. i am beginning with jsp and didn't had this JasperException in servlets. I do think that this problem is related to apache tomcat but don't know to configure it..

please help..

If you are a novice to JSP you should not be dealing with scriptlets at all. They are a poor practice that have been discredited for almost ten years now.

You should be spending your time learning proper techniques with the JSTL and EL.

well i am also learning EL currently but my problem is not with the coding. i do think it is related to configuration of APACHE TOMCAT or may be with the deployment descriptor web.xml

I am using NetBeans 6.5 and apache tomcat 6.0.18

please help me regarding this..

As you are using Netbeans, I have moved this to the IDEs forum.

What do you have in the JSP? And do you have any additional jar files in your WEB-INF/jar directory?

i am having all required jar files in Libraries which include all from the tomcat/lib folder and some commons.jar. None of them is having a broken reference.
One basic thing i didn't understand is that what is this org.apache.jasper.JasperException all about and how to rectify the line below

java.lang.ClassCastException:
org.apache.catalina.util.DefaultAnnotationProcessor cannot be cast to org.apache.AnnotationProcessor

@Ank rai, you are probably correct. I think the problem is in the configuration of the server.
Things you could check for:

1. There is no other instance of Apache Tomcat Server running
2. Your Environment/System variables are set correctly depending upon your OS.

Best of luck

Welcome to CodeRanch, Ashish Kataria!

i am having all required jar files in Libraries which include all from the tomcat/lib folder and some commons.jar.

What I meant was what do you have inside your application lib folder (<Appcontext>/WEB-INF/lib), not the Tomcat lib? This may have something to do with Catalina.jar, but it's just a guess.

I have only displaytag.tld and web.xml in the WEB-INF. In NetBeans there is separate folder named lib within the project in which all the jar files are kept. Until now when i was coding servlets in NetBeans i used to keep all jar files in the lib folder and everything worked fine. Following are the jar files in lib:

annotations-api
catalina
catalina-ant
catalina-ha
catalina-tribes
el-api
jasper
jasper-el
jasper-jdt
jsp-api
servlet-api
tomcat-coyote
tomcat-dbcp
tomcat-i18n-es
tomcat-i18n-fr
tomcat-i18n-ja
commons-beanutils
commons-beanutils-1.7.0
commons-collections-3.1
commons-digester
commons-fileupload-1.0
commons-fileupload-1.1.1
commons-fileupload-1.2.2
commons-io-1.3.2
commons-lang-2.3
commons-logging
commons-validator
displaytag-1.2
displaytag-export-poi-1.2
displaytag-portlet-1.2
itext-1.3
jakarta-oro
javaee
jstl
log4j-1.2.13
mysql-connector-java-5.0.7-bin
saxpath
servlet
standard
standard-1.1.2
uploadbean
xalan
xercesImpl
xml-apis

I'm not sure about the Netbean's configuration for server here that how it uses these jar files. But inside your project folder you shouldn't be keeping jar files which are used by the server like catalina.jar, tomcat-coyote.jar etc... Have you checked how these being used by the Netbeans or the Tomcat instance it runs?

Hi all!!!

My Jsp code is now working and executing. I uninstalled jdk and NetBeans and installed jdk 7 and NetBeans 7. Now its working perfectly.But I still don't understand what was that JasperException all about.

A lot of thanks to all java ranchers for helping through this..

I wish i could've helped you out earlier, but now that the problem is resolved, i would advice you not to get into the details of the problem now.
But if you are still curious, whatever i could figure out from all your given information.. the problem must be compatibility between jdk and netbeans. It is advised that you download and install the jdk+netbeans+apache pack from http://netbeans.org/downloads/
Another reason could be that jdk was already installed on your system and you installed netbeans+jdk pack.