"admin" page not found, "admin/event-service" page not found, "admin/users" page not found

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santo...@gmail.com

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Apr 19, 2023, 12:10:50 PM4/19/23
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Can someone help me, it appears

"admin" page not found, "admin/event-service" page not found, "admin/users" page not found

Glen Tomkowiak

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Apr 30, 2023, 12:37:47 PM4/30/23
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Experiencing this same issue but only after running do-release-upgrade on Ubuntu 20.04 LTS to Ubuntu 22.04 LTS

Rick Herrick

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May 1, 2023, 10:00:49 AM5/1/23
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There are many possible causes for this kind of error. We can’t even begin to guess at the cause without more info:
  • XNAT version
  • Any installed plugins and the version of those plugins
  • OS
  • Java version
  • Tomcat version
  • Any info from the XNAT and Tomcat logs that might be relevant
Rick Herrick
Senior Software Developer


------ Original Message ------
From "Glen Tomkowiak" <gtom...@gmail.com>
To "xnat_discussion" <xnat_di...@googlegroups.com>
Date 4/29/2023 4:12:11 PM
Subject [XNAT Discussion] Re: "admin" page not found, "admin/event-service" page not found, "admin/users" page not found

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Glen Tomkowiak

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May 1, 2023, 10:17:12 AM5/1/23
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I unfortunately reverted the server to our Ubuntu 20.04 image.
But we are running the following:
XNAT version 1.8.7.1, build: 30
Ubuntu 20.04 LTS
Tomcat9 (from ubuntu repo)
OpenJDK8 (from ubuntu repo)

The closest I could get to a useful error message is a crash in Catalina.out whenever I hit certain pages, notable the admin page.

29-Apr-2023 22:00:14.653 SEVERE [http-nio-8080-exec-11] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() forservlet [dispatcher] in context with path [] threw exception [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] with root cause
        java.lang.UnsupportedClassVersionError: org/eclipse/jdt/internal/compiler/env/INameEnvironment has been compiled by a morerecent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versionsup to 52.0

My best guess is the Tomcat9 version on Ubuntu 22.04 LTS is built with a newer version of Java perhaps?  Then this causes issues with XNAT being built with Java8?  I only think this because all advice for this error message is to move to Java 11.

Either way the best option for me was to rollback my server VM to Ubuntu 20.04 LTS, since the database / file storage is separate and this was possible without major issues.

John Flavin

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May 1, 2023, 10:26:30 AM5/1/23
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It looks like a problem with Ubuntu 22.04 LTS



John Flavin
Backend Team Lead
He/Him



Brad Zoltick

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May 1, 2023, 10:53:21 AM5/1/23
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This solved my issue with running XNAT version 1.8.7.1 on Ubuntu 22.04.2

image.png
Brad Zoltick


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Ekaterina Zilonova

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Sep 13, 2023, 8:59:35 AM9/13/23
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Hi all, 

I am getting the same issue (admin page not found), and screenshot above did not help. It sometimes works and sometimes "admin page not found". I cannot figure out what changes or what does it depend on, any ideas? Because it does not feel stable. 

Versions: xnat 1.8.9.1;  Ubuntu 22.04.3 LTS; openjdk version "1.8.0_382"; Apache Tomcat/9.0.80

Best regards, Katja

Rick Herrick

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Sep 13, 2023, 10:49:44 AM9/13/23
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Are you seeing any messages in the XNAT or Tomcat logs when these pages fail to display?

Rick Herrick
Senior Software Developer


------ Original Message ------
From "Ekaterina Zilonova" <zilonova...@gmail.com>
To "xnat_discussion" <xnat_di...@googlegroups.com>
Date 9/13/23, 6:05:41 AM
Subject Re: [XNAT Discussion] Re: "admin" page not found, "admin/event-service" page not found, "admin/users" page not found

Ekaterina Zilonova

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Sep 13, 2023, 1:12:18 PM9/13/23
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Hey  Rick, 

There were the following things around time it was not working. Is it some improper closing? How can it be prevented?

WARNING [main] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [xnat] appears to have started a thread named [DefaultQuartzScheduler_QuartzSchedulerThread] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
java.lang.Object.wait(Native Method)
 org.quartz.core.QuartzSchedulerThread.run(QuartzSchedulerThread.java:253)
 SEVERE [main] org.apache.catalina.loader.WebappClassLoaderBase.checkThreadLocalMapForLeaks The web application [xnat] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal) and a value of type [org.restlet.Context] (value [org.restlet.Context]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
SEVERE [main] org.apache.catalina.loader.WebappClassLoaderBase.checkThreadLocalMapForLeaks The web application [xnat] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal]) and a value of type [org.restlet.data.Response] (value [org.restlet.data.Response]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.

Thanks in advance!
Best regards, Katja

Rick Herrick

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Sep 13, 2023, 3:02:41 PM9/13/23
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These messages show pretty reliably on Tomcat shutdown, so I don’t think they’re related to your problem. Could you try the following:
  1. Shut down Tomcat
  2. Clear your XNAT and Tomcat log folders (e.g. move all the files in there currently to a temp folder somewhere or just delete them if you don’t need them)
  3. Restart Tomcat
  4. Try to go to your admin pages
  5. Presuming the error occurs, copy all the non-empty logs without shutting Tomcat down
Depending on where you have the logs stored, you could do something like this:

find /data/xnat/home/logs /var/log/tomcat9 -type f -size +0 | tar -T - -czf logs.tgz

Once you have those captured, look through those to see if there’s anything interesting showing up.

Rick Herrick
Senior Software Developer
He/him/his/hey you




------ Original Message ------
From "Ekaterina Zilonova" <zilonova...@gmail.com>
To "xnat_discussion" <xnat_di...@googlegroups.com>
Date 9/13/23, 10:45:25 AM
Subject Re: Re[2]: [XNAT Discussion] Re: "admin" page not found, "admin/event-service" page not found, "admin/users" page not found

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