Here is the backtrace from the server crash corefile of nxnode.bin
(gdb) bt
#0 0x00007fa28ddee612 in nxagentSynchronizationStop ()
from /usr/NX/lib/libnxdiag.so
#1 0x00007fa28df354e0 in ?? () from /usr/NX/lib/libnxdiag.so
#2 0x00007fa28df22cc0 in ?? () from /usr/NX/lib/libnxdiag.so
#3 0x00007fa282ffcc00 in ?? ()
#4 0x00007fa264ca39c0 in ?? ()
#5 0x00007fa2740150b0 in ?? ()
#6 0x0000000000000007 in ?? ()
#7 0x00007fa28e283c3f in ?? () from /usr/NX/lib/libnxc.so
#8 0x00007fa28d8d9e9a in start_thread ()
from /lib/x86_64-linux-gnu/libpthread.so.0
#9 0x00007fa28f4bb3fd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#10 0x0000000000000000 in ?? ()