Fails to conect to Linux nxserver

[Maverick]

My attempts to connect from NoMachine client on MacOS 6.8.2 to nxserver on Ubuntu 18.04.3 that is running version 6.8.1 started failing with a message “Oops The session negotiation failed” after I updated to the specified Ubuntu version.

The nxserver log on the Ubuntu server has the following messages:

2019-11-21 18:13:32 294.587  6312 NXSERVER User ‘username’ logged in from ‘ip.ad.dr.ess’ using authentication method NX-password.
2019-11-21 18:13:35 748.976  6312 NXSERVER ERROR! Cannot read limit from the file ‘/usr/NX/var/db/limits/connections.localhost%%3a4000’.

Can someone please let me know how to fix the problem?

Thanks!

[Maverick]

I was able to address the issue by deleting all the files in /usr/NX/var/db/limits/ and restarting the nxserver. I am now able to connect. I see all the files I deleted have been recreated and are no longer empty.

If anyone knows that the above is a bad hack and there is a better recommended way to handle this problem, please let me know.

Thanks!

[Maverick]

I also see the following error in /usr/NX/var/log/nxserver.log

2019-11-22 10:05:04 060.853  1253 NXSERVER WARNING! Process ‘/usr/NX/bin/nxexec /usr/NX/scripts/restricted/nxupdate.sh nx background check’ with pid ‘15351/15351’ finished with exit code 255 after 1,545 seconds.

Not sure if it is somehow related or can provide any additional information to provide suggestions for me.

Thanks!

[kroy]

From which version are you updatingNoMachine on Ubuntu? We cannot reproduce the problem. What rights have /usr/NX/var/db/limits file? It should have nx:root.

To check permissions use command: sudo ls -ltr /usr/NX/var/db/limits. To change owner execute: sudo chown nx:root /usr/NX/var/db/limits. After changes restart nxserver (sudo /usr/NX/bin/nxserver --restart).

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