Thanks Chris. That does make sense. that's why I stated to review change logs prior to upgrades.
-* "You take people as far as they will go, not as far as you would like them to go." — Jeanette Rankin *- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Jon McAlexander Sent from Proton Mail for Android. -------- Original Message -------- On Monday, 06/01/26 at 08:52 Christopher Schultz <[email protected]> wrote: Jon, Also: https://tomcat.apache.org/upgrading.html Specifically, the portions covering "minor upgrades". If you use a reverse-proxy along with the AJP protocol, I believe there will be a breaking change in there for you that will require a small change to your configuration. But, generally speaking, I would upgrade your Tomcat 9 installation in a test environment and proceed directly to testing. If your application works right away under the updated version, the whole thing will probably work. -chris On 5/29/26 3:35 AM, Jon McAlexander wrote: > Hi Tyler, > > In my experience rarely do you see issues with applications after upgrading > unless you are using internal Tomcat methods or internal api calls that may > have been deprecated. It's usually best to check through the Change Logs for > each release since the one you are upgrading from. > > Each release is inclusive of all the updates prior to them, so in my opinion > you should upgrade to the latest 9.0.x release available. > > Another suggestion would be to use the Alternative Setup method as described > in the Running.txt file with regards to Setting the Environment Variables and > using CATALINA_HOME and CATALINA_BASE to reference different locations on the > file system. So your binaries would be in CATALINA_HOME and your Instance/JVM > Configuration would be in CATALINA_BASE. The way I do it is to set a Symbolic > Link to my CATALINA_HOME location and then just update the link when I > install a new release. (If needed). This way you don't have to muck with your > configuration files and just need a restart for the new release to take > affect. > > Hope this all helps, > > -* "You take people as far as they will go, not as far as you would like them > to go." — Jeanette Rankin *- > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > Jon McAlexander > > Sent with [Proton Mail](https://proton.me/mail/home) secure email. > > On Thursday, May 28th, 2026 at 15:29, Brian Proffitt <[email protected]> wrote: > >> Forwarded from [email protected]. If you chose to respond, please respond to >> the original sender. >> >> BKP >> >> ---------- Forwarded message --------- >> From: Tyler Swartz <[email protected]> >> Date: Thu, May 28, 2026 at 3:35 PM >> Subject: Questions regarding updating Apache Tomcat on a server. >> To: [email protected] <[email protected]> >> >> Hello, >> I am looking to patch vulnerabilities within >> Apache Tomcat Tomcat9_102_NODE03 9.0.102 >> Apache Tomcat Tomcat9_104_NODE01 9.0.104 >> Apache Tomcat Tomcat9_34_NODE01 9.0.3 >> Apache Tomcat Tomcat9_34_NODE01 9.0.34 >> But before I do this I wanted to clarify if updating them or patching this >> is known to cause any issues with applications? >> Thanks. >> >> 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