[jira] [Comment Edited] (GUACAMOLE-2118) Unable to upgrade 1.5.5 to 1.6.0 due to sporadic hanging issue

["Mike Jumper (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/GUACAMOLE-2118?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18070493#comment-18070493 ] 

Mike Jumper edited comment on GUACAMOLE-2118 at 4/2/26 5:34 AM:
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Anyone here affected by this:

When possible, please retry against a fresh build of the {{staging/1.6.1}} branch of guacamole-server. A number of changes have been recently merged that fix issues that could manifest as this behavior.

{quote}
The offer still stands. ... I will give you an account on the system if it would help you debug this issue.
{quote}

Thanks, [~kangaroo22]. If things are still reproducible with a build of current {{staging/1.6.1}}, I'd be interested in taking a look.


was (Author: mike.jumper):
Anyone here affected by this:

When possible, please retry against a fresh build of the {{staging/1.6.1}} branch of guacamole-server. A number of changes have been recently merged that fix issues the could manifest as this behavior.

{quote}
The offer still stands. ... I will give you an account on the system if it would help you debug this issue.
{quote}

Thanks, [~kangaroo22]. If things are still reproducible with a build of current {{staging/1.6.1}}, I'd be interested in taking a look.

> Unable to upgrade 1.5.5 to 1.6.0 due to sporadic hanging issue
> --------------------------------------------------------------
>
>                 Key: GUACAMOLE-2118
>                 URL: https://issues.apache.org/jira/browse/GUACAMOLE-2118
>             Project: Guacamole
>          Issue Type: Bug
>    Affects Versions: 1.6.0
>            Reporter: Jason Keltz
>            Assignee: Mike Jumper
>            Priority: Major
>             Fix For: 1.6.1 [staging]
>
>         Attachments: 2026-03-11_14-56.png, backtrace threads, backtrace.log, guacamole-logs.txt, guacd-178388-gdb.txt, guacd-178388-lsof.txt, guacd-240326-gdb.txt, guacd-240326-lsof.txt, guacd-stale-report.sh, image-2025-09-08-15-11-59-435.png, image-blocks.jpg
>
>
> I've been running Guacamole since around 2020, upgrading reasonably quickly each and every time there's been an update.  I update my Tomcat to the latest 9.X release from time to time (currently 9.0.102) , and my JDK to the latest 8.X release from time to time (currently  jdk8u452-b09).  
> Recently, after attempting an upgrade from Guacamole 1.5.5 to 1.6.0, I ran into a problem.  Initially, everything seemed to work just fine.  I can connect to any of the systems I have available.  However, at some point later, I notice in the tomcat logs a lot of "connects" and "disconnects" to hosts.  Users start complaining that "Guacamole isn't working".  What I noticed at this point was that when they would try to return to a connection,  it would connect, and their existing connecting would start to redraw, but it would hang in the middle.  If I restart guacd at this point, it starts to work again, but the problem comes back. Some users would see it.  Other users were fine.  
> I feel like there's a bug hiding, and it may require a lot of user activity to get to it.  I ended up creating a devel system for testing, and I'm running guac 1.6.0 there, and I've enabled full debugging, but I can't seem to make it happen here yet.  Is there any easy way I can force a bunch of connections?  The devel system is running labtest Rocky 8.10 (RHEL8.10) with latest kernel and patches and this matches the production system.  They are both installed with the same kickstart configuration.    
> I'm opening this "bug" even though I don't have concrete information yet.  If I really have to do it, I may have to re-install on the production system to get the debugging information that I need, but I'd rather not do it if not necessary since it causes user inconvenience, and Guacamole is an important part of our educational environment.



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