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https://issues.apache.org/jira/browse/GUACAMOLE-2118?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18066180#comment-18066180
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Jason Keltz commented on GUACAMOLE-2118:
----------------------------------------
Nope.
The patch didn't solve this problem.
Only several hours later, and I'm already seeing in dmesg:
[Mon Mar 16 12:28:29 2026] guacd[846696]: segfault at 8 ip 00007f6eb43fb550 sp
00007f6e9d7f9c40 error 4 in libfreerdp-client2.so.2.11.7[7f6eb43dc000+6d000]
[Mon Mar 16 12:28:29 2026] Code: 05 00 00 ba 04 00 00 00 31 f6 31 c0 41 be 4f
05 00 00 e8 23 d2 fe ff 5f 41 58 e9 e3 fe ff ff 0f 1f 00 4c 8b 6d a0 48 8b 7b
60 <49> 8b 45 08 48 89 c2 49 2b 55 00 49 39 55 10 0f 84 c2 00 00 00 44
[Mon Mar 16 12:29:07 2026] guacd[846828]: segfault at 8 ip 00007f6e9c5a5550 sp
00007f6e9d7f9c40 error 4 in libfreerdp-client2.so.2.11.7[7f6e9c586000+6d000]
[Mon Mar 16 12:29:07 2026] Code: 05 00 00 ba 04 00 00 00 31 f6 31 c0 41 be 4f
05 00 00 e8 23 d2 fe ff 5f 41 58 e9 e3 fe ff ff 0f 1f 00 4c 8b 6d a0 48 8b 7b
60 <49> 8b 45 08 48 89 c2 49 2b 55 00 49 39 55 10 0f 84 c2 00 00 00 44
[Mon Mar 16 14:01:14 2026] guacd[859332]: segfault at 8 ip 00007f6e9c5a5550 sp
00007f6d9e7fbc40 error 4 in libfreerdp-client2.so.2.11.7[7f6e9c586000+6d000]
[Mon Mar 16 14:01:14 2026] Code: 05 00 00 ba 04 00 00 00 31 f6 31 c0 41 be 4f
05 00 00 e8 23 d2 fe ff 5f 41 58 e9 e3 fe ff ff 0f 1f 00 4c 8b 6d a0 48 8b 7b
60 <49> 8b 45 08 48 89 c2 49 2b 55 00 49 39 55 10 0f 84 c2 00 00 00 44
[Mon Mar 16 14:07:48 2026] guacd[861514]: segfault at 8 ip 00007f6e9c5a5550 sp
00007f6d9e7fbc40 error 4 in libfreerdp-client2.so.2.11.7[7f6e9c586000+6d000]
[Mon Mar 16 14:07:48 2026] Code: 05 00 00 ba 04 00 00 00 31 f6 31 c0 41 be 4f
05 00 00 e8 23 d2 fe ff 5f 41 58 e9 e3 fe ff ff 0f 1f 00 4c 8b 6d a0 48 8b 7b
60 <49> 8b 45 08 48 89 c2 49 2b 55 00 49 39 55 10 0f 84 c2 00 00 00 44
[Mon Mar 16 14:14:01 2026] traps: guacd[862277] general protection fault
ip:7f6eba7b0609 sp:7f6d9cff8aa8 error:0 in libc-2.28.so[7f6eba78b000+1cd000]
[Mon Mar 16 14:14:21 2026] guacd[862662]: segfault at 8 ip 00007f6e9c5a5550 sp
00007f6d9e7fbc40 error 4 in libfreerdp-client2.so.2.11.7[7f6e9c586000+6d000]
[Mon Mar 16 14:14:21 2026] Code: 05 00 00 ba 04 00 00 00 31 f6 31 c0 41 be 4f
05 00 00 e8 23 d2 fe ff 5f 41 58 e9 e3 fe ff ff 0f 1f 00 4c 8b 6d a0 48 8b 7b
60 <49> 8b 45 08 48 89 c2 49 2b 55 00 49 39 55 10 0f 84 c2 00 00 00 44
[Mon Mar 16 14:16:21 2026] guacd[863049]: segfault at 7f6ea8284498 ip
00007f6ea8284498 sp 00007f6d9cff8cb8 error 15
[Mon Mar 16 14:16:21 2026] Code: 00 00 00 00 00 00 00 00 00 00 d0 9c 38 a8 6e
7f 00 00 88 08 04 20 12 00 00 00 c3 cc 00 00 0a 00 00 00 00 00 40 00 01 00 00
00 <c4> cc 00 00 b0 8a 00 00 40 00 08 00 02 00 01 00 41 00 41 00 54 8a
[Mon Mar 16 14:56:22 2026] guacd[870155]: segfault at 7f69f4ddf2cd ip
00007f6e9c2d5c69 sp 00007f6d9d7f9cc0 error 4 in
libwinpr2.so.2.11.7[7f6e9c259000+108000]
[Mon Mar 16 14:56:22 2026] Code: ff 31 c0 48 8b 4d d8 64 48 33 0c 25 28 00 00
00 75 37 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 66 90 48 8b 00 48 89 df 48 89
c2 <48> 8b 30 ff 50 08 49 8b 7c 24 20 be 01 00 00 00 e8 d2 ce fb ff 48
[Mon Mar 16 15:02:36 2026] guacd[872992]: segfault at 7f6ea8389b00 ip
00007f6ea8389b00 sp 00007f6e9e7fbcb8 error 15
[Mon Mar 16 15:02:36 2026] Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 75 00 00 00 00 00 00
00 <60> 60 00 00 10 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00
[Mon Mar 16 15:02:36 2026] guacd[873001]: segfault at 7f6ea8389b00 ip
00007f6ea8389b00 sp 00007f6c737fdcb8 error 15
[Mon Mar 16 15:02:36 2026] Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 75 00 00 00 00 00 00
00 <60> 60 00 00 10 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00
[Mon Mar 16 15:02:36 2026] guacd[872988]: segfault at 0 ip 00007f6e9c2d5c69 sp
00007f6dbbffecc0 error 4
[Mon Mar 16 15:02:36 2026] guacd[872996]: segfault at 7f6ea8389b00 ip
00007f6ea8389b00 sp 00007f6d9cff8cb8 error 15
[Mon Mar 16 15:02:36 2026] Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 75 00 00 00 00 00 00
00 <60> 60 00 00 10 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00
[Mon Mar 16 15:02:36 2026] in libwinpr2.so.2.11.7[7f6e9c259000+108000]
[Mon Mar 16 15:02:36 2026] Code: ff 31 c0 48 8b 4d d8 64 48 33 0c 25 28 00 00
00 75 37 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 66 90 48 8b 00 48 89 df 48 89
c2 <48> 8b 30 ff 50 08 49 8b 7c 24 20 be 01 00 00 00 e8 d2 ce fb ff 48
[Mon Mar 16 15:02:37 2026] guacd[873068]: segfault at 0 ip 0000000000000000 sp
00007f6d7bffecb8 error 14 in guacd[400000+7000]
[Mon Mar 16 15:02:37 2026] Code: Unable to access opcode bytes at RIP
0xffffffffffffffd6.
[Mon Mar 16 15:03:05 2026] guacd[873297]: segfault at 7f6e017d3 ip
00007f6eb592ad3b sp 00007f6d1b7fdb80 error 4 in
libfreerdp2.so.2.11.7[7f6eb5838000+16c000]
[Mon Mar 16 15:03:05 2026] Code: e9 5b e5 ff ff 66 2e 0f 1f 84 00 00 00 00 00
f3 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41 54 49 89 f4 53 48 81 ec 08 01 00
00 <48> 8b 5e 18 4c 8b 3e 64 48 8b 04 25 28 00 00 00 48 89 45 c8 31 c0
[Mon Mar 16 15:03:48 2026] guacd[873686]: segfault at 25 ip 0000000000000025 sp
00007f6d7bffecb8 error 14 in guacd[400000+7000]
[Mon Mar 16 15:03:48 2026] Code: Unable to access opcode bytes at RIP
0xfffffffffffffffb.
[Mon Mar 16 15:04:40 2026] traps: guacd[874051] general protection fault
ip:7f6eb41248f7 sp:7f6dbbffeb20 error:0 in
libfreerdp2.so.2.11.7[7f6eb4035000+16c000]
[Mon Mar 16 15:07:28 2026] guacd[875634]: segfault at 0 ip 0000000000000000 sp
00007f6e9effccb8 error 14 in guacd[400000+7000]
[Mon Mar 16 15:07:28 2026] Code: Unable to access opcode bytes at RIP
0xffffffffffffffd6.
[Mon Mar 16 15:08:57 2026] guacd[876218]: segfault at 7f6ea8279f58 ip
00007f6ea8279f58 sp 00007f6e9effccb8 error 15
[Mon Mar 16 15:08:57 2026] Code: 00 00 00 00 00 00 00 00 00 00 90 f7 37 a8 6e
7f 00 00 88 08 04 20 12 00 00 00 c3 cc 00 00 0a 00 00 00 00 00 40 00 01 00 00
00 <c4> cc 00 00 f9 57 00 00 40 00 01 00 02 00 01 00 aa 00 aa 00 d5 57
[Mon Mar 16 15:08:57 2026] guacd[876209]: segfault at 7f69f6e0d364 ip
00007f6eb4127d3b sp 00007f6dd37fdb80 error 4 in
libfreerdp2.so.2.11.7[7f6eb4035000+16c000]
[Mon Mar 16 15:08:57 2026] Code: e9 5b e5 ff ff 66 2e 0f 1f 84 00 00 00 00 00
f3 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41 54 49 89 f4 53 48 81 ec 08 01 00
00 <48> 8b 5e 18 4c 8b 3e 64 48 8b 04 25 28 00 00 00 48 89 45 c8 31 c0
I have users complaining about the distorted screen image as per previous
images.
I still have processes consuming > 99% CPU:
863856 99.7 0.1 7202656 59428 ? Sl 14:19 52:39 /xsys/sbin/guacd -f -b
0.0.0.0
The offer still stands.. either [~vnick] or [~mjumper] - I will give you an
account on the system if it would help you debug this issue.
> 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
> Priority: Major
> Fix For: 1.6.1
>
> 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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