Tomcat 4 to 5.5.16 upgrade

Question

hello again! there are some jar files in tomcat 4 which are not in tomcat 5. i found some with direct replacement like the servlet.jar which is servlet-api.jar in the newer version. how about the other jar files from tomcat 4 with no direct replacement? can they simply be copied? thank you.\\
ria_b

Answer 1

I wouldn't try messing around with the default JARs that come with the Tomcat installation. Inventory exactly what external JARs your application needs, and put them in the WEB-INF/lib directory of your web-app.
The only time I've ever found it necessary to change the JAR files in common/lib is when WEB-INF/lib contains JARs which are already in common/lib. In this case, either remove the offending JAR from common/lib, or from WEB-INF/lib.
If you're bound to particular versions of a JAR because of the way your code is written, I'd move the Tomcat JARs out of common/lib and leave your WEB-INF/lib intact. However, that's only a temporary solution; best is to update your application to use the versions of the JARs that Tomcat is installed with. (Mostly it's just the jakarta-commons stuff that's affected, but I'm sure there's others)
Brian