Connection failed for user

[fiedel]

I was trying to connect to a server (Debian 10 + NoMachine Workstation Subscription v6.8.1) from a local machine (Ubuntu 18.04.6 LTS + NoMachine v6.18.1) through an ssh tunnel. It failed with error when creating a new virtual desktop:

The session negotiation failed.
Error: Session failed, application terminated prematurely.

/usr/NX/var/log/nxserver.log on the server shows:

2022-07-18 08:57:18 879.308 53528 NXSERVER User ‘fiedel’ logged in from ‘192.168.1.31’ using authentication method NX-password.
2022-07-18 08:57:18 881.413 53528 NXSERVER WARNING! User rich doesn’t exist in system.
2022-07-18 08:57:18 881.532 53528 NXSERVER WARNING! NXLogin: Cannot retrieve absolute username for user: rich.
2022-07-18 08:57:21 805.163 53559 NXNODE ERROR! Application terminated too early.
2022-07-18 08:57:21 816.552 53559 NXNODE WARNING! NXClientMonitor: NXClientMonitor: NXClient –monitor could not be started. Can’t send’NX> 990 MONITOR ON type=noDesktop ‘.
2022-07-18 08:57:21 835.150 53528 NXSERVER ERROR! Received error message from node ‘localhost:4000’, ‘Session failed, application terminated prematurely.’.

Why is nxserver looking for user ‘rich’? Any suggestions for this error?

Thanks.

 

[fiedel]

OK, I saw another user connected successfully, and the log for his session also shows “User rich doesn’t exist”. So the real problem is with the latter three lines:

2022-07-18 08:57:21 805.163 53559 NXNODE ERROR! Application terminated too early.
2022-07-18 08:57:21 816.552 53559 NXNODE WARNING! NXClientMonitor: NXClientMonitor: NXClient –monitor could not be started. Can’t send’NX> 990 MONITOR ON type=noDesktop ‘.
2022-07-18 08:57:21 835.150 53528 NXSERVER ERROR! Received error message from node ‘localhost:4000’, ‘Session failed, application terminated prematurely.’.

[Britgirl]

why is nxserver looking for user ‘rich’? Any suggestions for this error?

It’s a warning and not an error. You can remove user rich from the usersDB.
sudo /etc/NX/nxserver --userdel rich

Logs are required from the server side in order to understand what is causing the session to fail. Please follow the instructions here https://kb.nomachine.com/DT11R00182 and then send them to forum[at]nomachine[dot]com.

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