Problem loading XNAT after upgrading Ubuntu 22.04 ( jammy )

[Ruba]

Hi,

I cannot load XNAT (version 1.7.6) after upgrading Ubuntu from 18.04 (Bionic) to 22.04 (Jammy). Tomcat server log is showing this message: "GET /app/template/Login.vm HTTP/1.0" 404 -.

My old XNAT instance was running using Ubuntu 18.04, openjdk-8-jdk, and tomcat 7. Should I upgrade the tomcat version (9) to make it compatible with 22.04?

Can anyone please give me some suggestions to solve this problem?

Thank you in advance.

Best regards,

Ruba

[Richard Cole]

Have you followed the necessary changes in your config?

https://wiki.xnat.org/documentation/getting-started-with-xnat/xnat-installation-guide/prerequisites-for-installing-xnat/running-xnat-on-tomcat-8-5-and-later

On Wed, Jul 12, 2023 at 4:49 AM Ruba <rubaida...@gmail.com> wrote:

Hi,

I cannot load XNAT (version 1.7.6) after upgrading Ubuntu from 18.04 (Bionic) to 22.04 (Jammy). Tomcat server log is showing this message: "GET /app/template/Login.vm HTTP/1.0" 404 -.

Can anyone please give me some suggestions to solve this problem?

Thank you in advance.

Best regards,

Ruba

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[Rick Herrick]

In addition to the changes below, Ubuntu 22.04 has a number of issues that can make it difficult to run XNAT. The primary problem is that the Tomcat build on the standard Ubuntu deb repository includes a library that was built with Java 11. That means you have to run Tomcat with Java 11 or later, but XNAT is not currently compatible with Java 11. This is a known issue (as described here) with no fix likely.

So if you’re trying to run XNAT with Tomcat 9 and OpenJDK 8 and you see this message (and you will):

Message java.lang.UnsupportedClassVersionError: org/eclipse/jdt/internal/compiler/env/INameEnvironment has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0

The only work-around for that is manually installing Tomcat 9.

Rick Herrick

Senior Software Developer

rickh...@flywheel.io

------ Original Message ------

From "Richard Cole" <richie...@gmail.com>

To xnat_di...@googlegroups.com

Date 7/12/23, 6:35:06 AM

Subject Re: [XNAT Discussion] Problem loading XNAT after upgrading Ubuntu 22.04 ( jammy )

To view this discussion on the web visit https://groups.google.com/d/msgid/xnat_discussion/CAMJTqOeQTH%3D%2BvvfTGeWwWPpQMR9iB5Hoiqo_OS0jkG2XwHQJCA%40mail.gmail.com.

[Ruba]

Hi,

Thanks for the link and suggestions.

I am still using XNAT version 1.7.6 and do not want to upgrade now.

The link suggested running XNAT (1.8.1 and earlier) with Tomcat 9, but is it possible to continue using older versions (Tomcat 7 and OpenJDK 8) in Ubuntu 22.04? How can I resolve the XNAT loading issue if I keep the older versions?

Thanks again.

Best regards,

Ruba