Erro http 500

Bom dia, estou integrando o Hibernate ao Struts2 utilizando o tomcat e estou tendo este erro e pelo que eu descobri esse erro se da devido a especificao JSP e Servlets nao ser compativel com a versao, entao minha pergunta é, como faco para atualizar a especificacao e se eu devo utilizar o jike ou ant para fazer esta integracao.

HTTP Status 500 -

--------------------------------------------------------------------------------

type Exception report

message

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

exception

org.apache.jasper.JasperException: Unable to compile class for JSP:


An error occurred at line: 18 in the generated java file
The return type is incompatible with JspSourceDependent.getDependants()

Stacktrace:
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:93)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:451)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:319)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:298)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:286)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:564)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:302)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)

javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:414)
org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:414)
org.apache.struts2.dispatcher.ActionContextCleanUp.doFilter(ActionContextCleanUp.java:99)


note The full stack trace of the root cause is available in the Apache Tomcat/5.5.28 logs.


--------------------------------------------------------------------------------