Tomcat 5.0.29 was released on October 6th, 2004. Work on the 5.0 branch is primarily
for maintenance and bug fixes. It is still considered the best branch for production use, but
Tomcat 5.5 is rapidly nearing a stable release.
Tomcat 5.5 has several major goals. They are discussed in the tomcat-dev
mailing list's "5.next" thread:
The status of some of these items is detailed below. This branch has yet to have a stable
release, but stability is improving and a stable release is expected soon.
Tomcat 4.0.x is relatively old, and not actively maintained or supported.
It is strongly recommended that users of these releases upgrade to the latest
stable Tomcat 5.0 release or at least the latest stable Tomcat 4.1 release.
Tomcat 4.1.x is no longer actively developed. It is maintained to address
only showstopper, security, and Servlet Specification compliance issues. Maintenance
for Tomcat 4.1.x will likely cease once a stable release or two of Tomcat 5.1 are out.
Users of Tomcat 4.1.x are strongly encouraged to upgrade to the latest stable Tomcat
Tomcat 3.3.x is in roughly the same maintenance mode as Tomcat 4.1.x.
Tomcat 3.2 and earlier are in roughly the same support state as Tomcat 4.0.x.
Users should upgrade to Tomcat 3.3.x or the latest stable Tomcat 5.0.x.