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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