Urgent:Error while accessing deployed application in JBoss4.

[ushashi]

Our application got successfully deployed in JBoss4.0.3SP1 in linux environment
ANT version 1.7.0
JDK version 1.5.0.06
Ant and JAVA path are mentioned in profile and
version of ant and java are echoed correctly when we give ant -version and java -version.

Error Description:

While accesing the application we get the following error,

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

exception

javax.servlet.ServletException: org/apache/tools/ant/Main
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:272)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)

root cause

java.lang.NoClassDefFoundError: org/apache/tools/ant/Main
org.apache.tools.ant.Project.initProperties(Project.java:308)
org.apache.tools.ant.Project.init(Project.java:295)
org.apache.jasper.compiler.AntCompiler.getProject(AntCompiler.java:74)
org.apache.jasper.compiler.AntCompiler.generateClass(AntCompiler.java:129)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:288)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:267)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:255)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:556)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:293)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)

note The full stack trace of the root cause is available in the Apache Tomcat/5.5 logs.


Kindly let us know the solution if anyone has encountered and solved this problem. very urgent.

Thanks

[jwenting]

Your JSP page is calling ANT?
Sounds like a very strange configuration you have there, and hardly surprising it fails, especially if you didn't take care to have ANT available in the lib directory of the web application.

[ushashi]

Thanks for the reply. but ant.jar is present in the lib.
Please give us an idea on what kind of configuration problem could be causing this problem.

[jwenting]

"in the lib" doesn't mean anything really.
What "lib" for example? If that "lib" on the classpath for the servlet?
And even if it is, that doesn't mean the required classes are as ANT has of dependencies of its own.

You'd best read the ANT documentation on how to integrate ANT tasks into your application.