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Searching in: Trouble Reports
ID: TR05R09690
Added on: 2020-05-15
Last update: 2020-05-15
Affects: 6
Due to be solved in:  6.x
Platform: All Linux Platforms
Product: NoMachine Server
Severity: Serious
Status: Open
NoMachine virtual desktops are suddenly disconnected under specific conditions

This problem has been reported affecting a Linux multi-node environment v. 6.8.1 but it can affect also v. 6.9.2 and 6.10.12 and standalone NoMachine servers on Linux.

In case of abnormal disconnections (e.g. the user disconnect his laptop from the network without closing the NoMachine session before), it has been observed that the session is suddenly terminated.

No workaround is available.

 

The session log reports:

Session: Display failure detected on display 'nx/nx,...
...
nxagentSetupRandrInfo: ERROR! Can't get resource info.

 

The backtrace of the nxnode.bin program reports:

 Thread 1 (Thread 0x7fab2ffff700 (LWP 28437)):
#0  0x00007fab3dca52e0 in XextFindDisplay () from /usr/NX/lib/libnxdiex.so
#1  0x00007fab3dca489d in ?? () from /usr/NX/lib/libnxdiex.so
#2  0x00007fab3dca5162 in XextAddDisplay () from /usr/NX/lib/libnxdiex.so
#3  0x00007fab3dcb683e in XRRQueryExtension () from /usr/NX/lib/libnxdiex.so
#4  0x00007fab410972ae in nxagentSetupRandrInfo () from /usr/NX/lib/libnxdiag.so
#5  0x00007fab410f59cd in nxagentOpenScreen () from /usr/NX/lib/libnxdiag.so
#6  0x00007fab410f5d09 in nxagentReconnectScreen () from /usr/NX/lib/libnxdiag.so
#7  0x00007fab410deb89 in nxagentReconnectSession () from /usr/NX/lib/libnxdiag.so
#8  0x00007fab410dfb83 in nxagentHandleConnectionStates () from /usr/NX/lib/libnxdiag.so
#9  0x00007fab410d0b5d in nxagentWakeupHandler () from /usr/NX/lib/libnxdiag.so
#10 0x00007fab3ea3cbca in WakeupHandler () from /usr/NX/lib/libnxdifb.so
#11 0x00007fab3eaa3863 in WaitForSomething () from /usr/NX/lib/libnxdifb.so
#12 0x00007fab3ea383b7 in Dispatch () from /usr/NX/lib/libnxdifb.so
#13 0x00007fab3ea2585b in _NXDisplayMain () from /usr/NX/lib/libnxdifb.so
#14 0x00007fab3fb16d34 in ?? () from /usr/NX/lib/libnxc.so
#15 0x00007fab409176ba in start_thread (arg=0x7fab2ffff700) at pthread_create.c:333
#16 0x00007fab4064d41d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109


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