On Tue, 25 Sep 2001 [EMAIL PROTECTED] wrote:
> Date: Tue, 25 Sep 2001 09:53:26 -0700
> From: [EMAIL PROTECTED]
> Reply-To: [EMAIL PROTECTED]
> To: [EMAIL PROTECTED]
> Subject: Is Tomcat 4.0 Backward Compatible with 3.2.3 App??
>
> How backward compatible is Tomcat 4.0?
>
> I have an application that I developed with tomcat 3.2 and deployed on
> JRun 3.0. Since then I have installed the final 4.0 and now have some
> changes to make to my application and I am getting all kinds of errors
> using the same .WAR file.
>
> I have re-installed 3.2.3 to make sure that I did not screw up a config file
> or something else and it works fine. Is there something that I missed
> where I have to do a conversion on my older apps to use them in Tomcat 4.0?
>
If an application that works on Tomcat 3.2.3 meets the following criteria,
it should run unchanged on Tomcat 4.0:
* Compliant with the Servlet 2.2 and JSP 1.1 specs
* Does not rely on bugs in Tomcat 3.2.3 that have been fixed in 4.0
* Does not rely on non-specification-related behavior that might
have changed in 4.0
Failure to run is a bug in 4.0 if all these criteria are met. By far the
most common problem people have is web.xml files that have elements not
conforming to the DTD requirements (which violates the first requirement
above) -- Tomcat 3.2.3 accepted such web.xml files anyway, but Tomcat 4.0
will not.
> Thanks
>
> Eric Wright, Programmer / Analyst
> Vivid Solutions Inc.
> INTERNET : [EMAIL PROTECTED]
Craig
