Eu to tendo o seguinte erro, alguém pode me ajudar. 
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HTTP Status 500 - type Exception report message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: org.apache.jasper.compiler.Compiler
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:272)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause
java.lang.InstantiationError: org.apache.jasper.compiler.Compiler
org.apache.jasper.JspCompilationContext.createCompiler(JspCompilationContext.java:234)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:505)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:303)
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:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.17 logs.
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