I encountered this problem trying to run a STRUTS-EXAMPLE application on Windows 
2000(SP4) - Tomcat 5.0.17, Linux(RedHat 9) - Tomcat 4.1.27-LE, Tomcat 5.0.25, 
Tomcat 5.0.27, FreeBSD 5.2.1 - Tomcat 5.0.17.

Stack trace :

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: 6 in the jsp file: /index.jsp
Generated servlet error:
/usr/local/app/jakarta-tomcat-5.0.
27/work/Catalina/localhost/struts-example/org/apache/jsp/index_jsp.java:110: 
_jspx_meth_bean_message_0(javax.servlet.jsp.tagext.JspTag,javax.servlet.jsp.
PageContext) in org.apache.jsp.index_jsp cannot be applied to (org.apache.
struts.taglib.html.HtmlTag,javax.servlet.jsp.PageContext)
        if (_jspx_meth_bean_message_0(_jspx_th_html_html_0, _jspx_page_context))
            ^


An error occurred at line: 6 in the jsp file: /index.jsp
Generated servlet error:
/usr/local/app/jakarta-tomcat-5.0.
27/work/Catalina/localhost/struts-example/org/apache/jsp/index_jsp.java:113: 
_jspx_meth_html_base_0(javax.servlet.jsp.tagext.JspTag,javax.servlet.jsp.
PageContext) in org.apache.jsp.index_jsp cannot be applied to (org.apache.
struts.taglib.html.HtmlTag,javax.servlet.jsp.PageContext)
        if (_jspx_meth_html_base_0(_jspx_th_html_html_0, _jspx_page_context))
            ^


An error occurred at line: 6 in the jsp file: /index.jsp
Generated servlet error:
/usr/local/app/jakarta-tomcat-5.0.
27/work/Catalina/localhost/struts-example/org/apache/jsp/index_jsp.java:119: 
_jspx_meth_logic_notPresent_0(javax.servlet.jsp.tagext.JspTag,javax.servlet.jsp.
PageContext) in org.apache.jsp.index_jsp cannot be applied to (org.apache.
struts.taglib.html.HtmlTag,javax.servlet.jsp.PageContext)
        if (_jspx_meth_logic_notPresent_0(_jspx_th_html_html_0, 
_jspx_page_context))
            ^


An error occurred at line: 6 in the jsp file: /index.jsp
Generated servlet error:
/usr/local/app/jakarta-tomcat-5.0.
27/work/Catalina/localhost/struts-example/org/apache/jsp/index_jsp.java:123: 
_jspx_meth_logic_notPresent_1(javax.servlet.jsp.tagext.JspTag,javax.servlet.jsp.
PageContext) in org.apache.jsp.index_jsp cannot be applied to (org.apache.
struts.taglib.html.HtmlTag,javax.servlet.jsp.PageContext)
        if (_jspx_meth_logic_notPresent_1(_jspx_th_html_html_0, 
_jspx_page_context))
            ^


An error occurred at line: 6 in the jsp file: /index.jsp
Generated servlet error:
/usr/local/app/jakarta-tomcat-5.0.
27/work/Catalina/localhost/struts-example/org/apache/jsp/index_jsp.java:128: 
_jspx_meth_bean_message_1(javax.servlet.jsp.tagext.JspTag,javax.servlet.jsp.
PageContext) in org.apache.jsp.index_jsp cannot be applied to (org.apache.
struts.taglib.html.HtmlTag,javax.servlet.jsp.PageContext)
        if (_jspx_meth_bean_message_1(_jspx_th_html_html_0, _jspx_page_context))
            ^


An error occurred at line: 6 in the jsp file: /index.jsp
Generated servlet error:
/usr/local/app/jakarta-tomcat-5.0.
27/work/Catalina/localhost/struts-example/org/apache/jsp/index_jsp.java:133: 
_jspx_meth_html_link_0(javax.servlet.jsp.tagext.JspTag,javax.servlet.jsp.
PageContext) in org.apache.jsp.index_jsp cannot be applied to (org.apache.
struts.taglib.html.HtmlTag,javax.servlet.jsp.PageContext)
        if (_jspx_meth_html_link_0(_jspx_th_html_html_0, _jspx_page_context))
            ^


An error occurred at line: 6 in the jsp file: /index.jsp
Generated servlet error:
/usr/local/app/jakarta-tomcat-5.0.
27/work/Catalina/localhost/struts-example/org/apache/jsp/index_jsp.java:137: 
_jspx_meth_html_link_1(javax.servlet.jsp.tagext.JspTag,javax.servlet.jsp.
PageContext) in org.apache.jsp.index_jsp cannot be applied to (org.apache.
struts.taglib.html.HtmlTag,javax.servlet.jsp.PageContext)
        if (_jspx_meth_html_link_1(_jspx_th_html_html_0, _jspx_page_context))
            ^


An error occurred at line: 6 in the jsp file: /index.jsp
Generated servlet error:
/usr/local/app/jakarta-tomcat-5.0.
27/work/Catalina/localhost/struts-example/org/apache/jsp/index_jsp.java:143: 
_jspx_meth_html_link_2(javax.servlet.jsp.tagext.JspTag,javax.servlet.jsp.
PageContext) in org.apache.jsp.index_jsp cannot be applied to (org.apache.
struts.taglib.html.HtmlTag,javax.servlet.jsp.PageContext)
        if (_jspx_meth_html_link_2(_jspx_th_html_html_0, _jspx_page_context))
            ^


An error occurred at line: 6 in the jsp file: /index.jsp
Generated servlet error:
/usr/local/app/jakarta-tomcat-5.0.
27/work/Catalina/localhost/struts-example/org/apache/jsp/index_jsp.java:148: 
_jspx_meth_html_img_0(javax.servlet.jsp.tagext.JspTag,javax.servlet.jsp.
PageContext) in org.apache.jsp.index_jsp cannot be applied to (org.apache.
struts.taglib.html.HtmlTag,javax.servlet.jsp.PageContext)
        if (_jspx_meth_html_img_0(_jspx_th_html_html_0, _jspx_page_context))
            ^


An error occurred at line: 30 in the jsp file: /index.jsp
Generated servlet error:
/usr/local/app/jakarta-tomcat-5.0.
27/work/Catalina/localhost/struts-example/org/apache/jsp/index_jsp.java:287: 
_jspx_meth_bean_message_2(javax.servlet.jsp.tagext.JspTag,javax.servlet.jsp.
PageContext) in org.apache.jsp.index_jsp cannot be applied to (org.apache.
struts.taglib.html.LinkTag,javax.servlet.jsp.PageContext)
        if (_jspx_meth_bean_message_2(_jspx_th_html_link_0, _jspx_page_context))
            ^


An error occurred at line: 31 in the jsp file: /index.jsp
Generated servlet error:
/usr/local/app/jakarta-tomcat-5.0.
27/work/Catalina/localhost/struts-example/org/apache/jsp/index_jsp.java:335: 
_jspx_meth_bean_message_3(javax.servlet.jsp.tagext.JspTag,javax.servlet.jsp.
PageContext) in org.apache.jsp.index_jsp cannot be applied to (org.apache.
struts.taglib.html.LinkTag,javax.servlet.jsp.PageContext)
        if (_jspx_meth_bean_message_3(_jspx_th_html_link_1, _jspx_page_context))
            ^


An error occurred at line: 35 in the jsp file: /index.jsp
Generated servlet error:
/usr/local/app/jakarta-tomcat-5.0.
27/work/Catalina/localhost/struts-example/org/apache/jsp/index_jsp.java:385: 
_jspx_meth_bean_message_4(javax.servlet.jsp.tagext.JspTag,javax.servlet.jsp.
PageContext) in org.apache.jsp.index_jsp cannot be applied to (org.apache.
struts.taglib.html.LinkTag,javax.servlet.jsp.PageContext)
        if (_jspx_meth_bean_message_4(_jspx_th_html_link_2, _jspx_page_context))
            ^
12 errors



org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.
java:84)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:332)
org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:412)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:472)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.
java:25)
java.lang.reflect.Method.invoke(Method.java:324)
org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:239)
java.security.AccessController.doPrivileged(Native Method)
javax.security.auth.Subject.doAsPrivileged(Subject.java:499)
org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:266)
org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:157)

note The full stack trace of the root cause is available in the Apache Tomcat/5.
0.27 logs.
Apache Tomcat/5.0.27