Tomcat Struts ClassCastException - looks like a Tomcat bug

[Stewart]

Using Struts 1.2.7 with the latest Tomcat 5.5.9 I get the following in
localhost.<date>.log when I first try to access my web application:

17-Aug-2005 11:02:02 org.apache.catalina.core.StandardHostValve custom
SEVERE: Exception Processing
ErrorPage[exceptionType=java.lang.Exception, location=/error.jsp]
org.apache.jasper.JasperException: Failed to load or instantiate
TagExtraInfo class: org.apache.struts.taglib.html.MessagesTei

And in stdout_<date>.log I get:

ERRORrg.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:704)
Servlet.service() for servlet jsp threw exception
java.lang.ClassCastException: org.apache.struts.taglib.html.MessagesTei

Through trial and error I have found that this does not happen with
Tomcat 5.0.28, with all other factors (struts, my application, etc)
kept the same.

Thought you all might like to know.

Stewart

 

[jan V]

You already started this thread a few days ago. Why do you post it again?
Please don't do that, it kinda undermines the thread-based nature of
newsgroups.

 

[jan V]

You already started this thread a few days ago. Why do you post it again?

Please don't do that, it kinda undermines the thread-based nature of

newsgroups.

Please ignore this post. Cheers. My mistake (apparently)

 

[Stewart]

OK. After help from some colleagues (who refered me to:
http://www.systemmobile.com/wp/?p=152) and the struts users mailing
list, and some experimenting of my own...

I had a copy of jsp-api.jar in my app (/WEB-INF/lib/jsp-api.jar)
and BOTH Tomcat 5.0.28 and 5.5.9 have a copy
($CATALINA_HOME/common/lib/jsp-api.jar)

This is a problem for Tomcat 5.5.9 but not for 5.0.28.
By removing my copy of jsp-api.jar (no loss because Tomcat has it
anyway) my app runs just fine with Tomcat 5.5.9.

Problem solved, but it does leave the mystery of why it's a problem for
5.5.9 and not for 5.0.28...