Hello All,

I'm using Beginning JSP 2.0 book and tomcat 5.0.7 on Linux. Custom tags are not working for me.

I realized that problem exists trying example from Chapter 4 (page 116). Every time when I access that page, I get error message like this:


----------- start error message ---------------
exception

javax.servlet.ServletException
    org.apache.jasper.runtime.PageContextImpl.handlePa geException(PageContextImpl.java:679)
    org.apache.jsp.index_jsp._jspService(index_jsp.jav a:77)
    org.apache.jasper.runtime.HttpJspBase.service(Http JspBase.java:136)
    javax.servlet.http.HttpServlet.service(HttpServlet .java:856)
    org.apache.jasper.servlet.JspServletWrapper.servic e(JspServletWrapper.java:320)
    org.apache.jasper.servlet.JspServlet.serviceJspFil e(JspServlet.java:293)
    org.apache.jasper.servlet.JspServlet.service(JspSe rvlet.java:240)
    javax.servlet.http.HttpServlet.service(HttpServlet .java:856)

root cause

java.lang.IncompatibleClassChangeError

org.apache.jsp.tag.web.display_tag.doTag(display_t ag.java:97)
    org.apache.jsp.index_jsp._jspx_meth_tags_display_0 (index_jsp.java:94)
    org.apache.jsp.index_jsp._jspService(index_jsp.jav a:64)
    org.apache.jasper.runtime.HttpJspBase.service(Http JspBase.java:136)
    javax.servlet.http.HttpServlet.service(HttpServlet .java:856)
    org.apache.jasper.servlet.JspServletWrapper.servic e(JspServletWrapper.java:320)
    org.apache.jasper.servlet.JspServlet.serviceJspFil e(JspServlet.java:293)
    org.apache.jasper.servlet.JspServlet.service(JspSe rvlet.java:240)
    javax.servlet.http.HttpServlet.service(HttpServlet .java:856)

--------- end error message ----------

I was trying to write my own example using custom tags, and I had the same problem unless I move my example from /webapps to /webapps/jsp-examples subdirectory in Tomcat tree. Be ware that my application is working without custom tags!

Any idea how to solve this?

Kind Regards,

Alex

There is solution for this problem: upgrade to Tomcat 5.0.9!