Nxnode terminates on Fedora 41

[pupu]

After an upgrade to Fedora 41, I can no longer connect to NX. I can see this in my server log:

Info: Handler started with pid 28156 on Thu Jul 31 10:01:32 2025.

Info: Handling connection from 10.11.18.161 port 63151 on Thu Jul 31 10:01:32 2025.

28156 28156 2025-07-31 10:01:33 281.551 NXSERVER Connected from remote machine '10.11.18.161' using protocol 'NX'.

28156 28156 2025-07-31 10:01:33 281.604 NXSERVER Process initialized with arguments '-c /etc/NX/nxserver --login -H 11'.

28156 28156 2025-07-31 10:01:33 701.377 NXSERVER User 'pupu' logged in from '10.11.18.161' using authentication method NX-password.

Info: Connection from 10.11.18.161 port 63151 closed on Thu Jul 31 10:01:36 2025.

Info: Handler with pid 28156 terminated on Thu Jul 31 10:01:36 2025.

27397 27397 10:01:36 982 nxexecPAMCloseSession: Pam transaction must be provided

26809 26809 2025-07-31 10:01:36 985.244 NXSERVER WARNING! Process '/usr/NX/bin/nxexec --node --nopam --user root --priority realtime --mode 0 --pid 50' with pid '27397/27397' finished with exit code 11 after 1511,353 seconds.

26809 26809 2025-07-31 10:01:36 985.385 NXSERVER WARNING! D2BB9C5ACA395A48739E974C379EC502 nxnode died with exit code 11.

28156 28156 2025-07-31 10:01:36 987.527 NXSERVER ERROR! Received error message from node 'localhost:4000', 'Last operation failed.'.

26809 26809 2025-07-31 10:01:37 006.213 NXSERVER WARNING! NXRedis: field ServerStatusDump in command line 'command=hset,service=db,key=running.D2BB9C5ACA395A48739E974C379EC502,field=ServerStatusDump,value=\n' cannot be empty.

26809 26809 2025-07-31 10:01:37 006.321 NXSERVER WARNING! NXRedis: command line 'command=hset,service=db,key=running.D2BB9C5ACA395A48739E974C379EC502\n' cannot set nothing.

26809 26809 2025-07-31 10:01:37 006.370 NXSERVER WARNING! NXRedis: Sending command 'command=hset,service=db,key=running.D2BB9C5ACA395A48739E974C379EC502\n' aborted.

26809 26809 2025-07-31 10:01:37 035.396 NXSERVER WARNING! Session D2BB9C5ACA395A48739E974C379EC502 crashed on display 0.

Info: Handler started with pid 28393 on Thu Jul 31 10:01:37 2025.

Info: Handling connection from 10.11.18.161 port 63165 on Thu Jul 31 10:01:37 2025.

28156 28156 2025-07-31 10:01:37 658.499 NXSERVER ERROR! Status 'Failed' for 'started' session '9FC6E56CE9D7FE33DBEF5CEB06C7D852'.

28156 28156 2025-07-31 10:01:37 673.675 NXSERVER User 'pupu' from '10.11.18.161' logged out.

28156 28156 2025-07-31 10:01:37 674.345 NXSERVER Remote machine '10.11.18.161' disconnected.

Connection failure: Connection refused

pa_context_connect() failed: Connection refused

28372 28372 2025-07-31 10:01:37 729.882 NXNODE WARNING! Process '/bin/pactl info' with pid '28456/28456' finished with exit code 1 after 0,006 seconds.

28372 28372 2025-07-31 10:01:37 729.945 NXNODE   Process initialized with arguments ''.

Connection failure: Connection refused

pa_context_connect() failed: Connection refused

28372 28372 2025-07-31 10:01:37 737.215 NXNODE WARNING! Process '/bin/pactl info' with pid '28457/28457' finished with exit code 1 after 0,006 seconds.

28393 28393 2025-07-31 10:01:38 580.292 NXSERVER Connected from remote machine '10.11.18.161' using protocol 'NX'.

28393 28393 2025-07-31 10:01:38 580.331 NXSERVER Process initialized with arguments '-c /etc/NX/nxserver --login -H 12'.

26809 26809 2025-07-31 10:01:38 609.777 NXSERVER ERROR! Cannot send command the server 2D5CB4387E6C99BCAB2D75AF38189A67: session doesn't exist.

26809 26809 2025-07-31 10:01:38 610.232 NXSERVER ERROR! Cannot send command the server 9FC6E56CE9D7FE33DBEF5CEB06C7D852: session doesn't exist.

28393 28393 2025-07-31 10:01:39 027.538 NXSERVER User 'pupu' logged in from '10.11.18.161' using authentication method NX-password.

Info: Connection from 10.11.18.161 port 63165 closed on Thu Jul 31 10:01:39 2025.

Info: Handler with pid 28393 terminated on Thu Jul 31 10:01:39 2025.

28393 28393 2025-07-31 10:01:39 601.761 NXSERVER Remote machine '10.11.18.161' disconnected.

28393 28393 2025-07-31 10:01:39 602.037 NXSERVER User 'pupu' from '10.11.18.161' logged out.

 

I guess nxexec crashes for some reason, but I don’t know why.

Jul 31 10:01:36 fractal kernel: nxnode.bin[28340]: segfault at 2c ip 00007f2e7a634a6f sp 00007f2e0fffe798 error 4 in libnxdimi.so[34a6f,7f2e7a600000+8a000] likely on CPU 0 (core 0, socket 0

)

Jul 31 10:01:36 fractal kernel: Code: 5b c3 90 0f 1f 84 00 00 00 00 00 8b 87 b0 81 00 00 89 06 8b 87 b4 81 00 00 89 02 48 63 87 9c 59 01 00 48 8b 84 c7 38 56 01 00 <8b> 40 2c 89 01 48 63 87

9c 59 01 00 48 8b 84 c7 38 56 01 00 8b 40

…after turning on abrt processing of unpackaged binaries…

Jul 31 10:16:38 fractal abrt-notification[29462]: Process 28372 (nxnode.bin) crashed in X11Poller::getBits(int*, int*, int*, int*, int*, int*, NXShadowColorspace*)()

Any idea?

Fedora 41, KDE/Plasma desktop

Thanks

P.U.

[Britgirl]

Hi, are you able to send us the server-side logs so we can check them? You can extract them using the instructions here: https://kb.nomachine.com/DT08U00298#1.1, by clicking Take logs in Settings > Server > Security. For the moment, no specific debug level is required.

Send them to forum[at]nomachine[dot]com. Please use the title of this topic as the subject of your email. Thanks!

[pupu]

Hi, OK, sent. I have ssh connection to the box, but no graphics, so some remote debugging is possible. Thanks!

P.U.

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