catalina-ha.jar (High availability package).catalina-ant.jar (Tomcat Catalina Ant tasks).catalina.jar (Tomcat Catalina implementation).annotations-api.jar (Annotations package).

Here's the complete list from the release notes: For Servlet 4.0 APIs, pages using wildcard import syntax with the new classes added to Servlet API may conflict with ones in web apps.

There is now support for Servlet 4.0, Java Server Pages 2.3, Java Unified Expression Language 3.0, and Java API for WebSocket 1.0. When it comes to the specification APIs, Tomcat 9 includes upgrades to the servlet, JSP, EL, and WebSocket versioning. When Tomcat 9 was released, there were several notable upgrades and requirements (like Java 8) that merited a whole new version numbering. Like many open source producers, Tomcat provides major branch upgrades as well as new features that are incorporated into the package. Notable Changes and Additions in Tomcat 9 Java 8 is required, but you can certainly use newer versions of Java to help future-proof your Tomcat environment. Tomcat insists that you start fresh with the new configuration file and adjust accordingly. One of the biggest things to consider when upgrading to a newer branch of Tomcat is that you cannot copy over configuration files from the previous version. The average lifetime for a Tomcat release is about 10 years, but this is always subject to change and nothing is written in stone yet for Tomcat 9.x. The current version available is 9.0.65, which was released on July 20, 2022. Release DateĪpache Tomcat 9.0.1 was released on October 4, 2017. Migration Considerations for Tomcat 8, 9, and 10Īlthough Tomcat 9 is not the most recent major release - Tomcat 10 became available in July of 2022 - it's still supported by the Tomcat community and is not yet end of life.

Notable Changes and Additions in Tomcat 9.

In this blog, we'll look at how Tomcat 9 differs from both earlier and later Tomcat releases and what to consider before migrating. Tomcat is a popular alternative to proprietary software among Java teams because it's developer-friendly and lightweight, and can be deployed for basically anything that is user-facing. First introduced in 1999, Apache Tomcat is a web server and Java servlet container that many enterprises rely on as a critical infrastructure tool.

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