- On 03/26/2018 03:45 PM, Qianqian Fang wrote:
I run a small cluster for my lab, including about 12 Linux boxes running Ubuntu 14.04 (1x with 16.04). We have been using x2go and ssh as the primary tool to access these computing resources.
Recently (started a month ago), I noticed there were package updates of x2go server (now 4.1.0.0-0-1517), client (now 4.1.1.1-0-1719) and the nx11 libraries, on the other hand, I started having difficulty log on to some of my servers, and this list starts to grow. I am not sure if this was the result of the recent package upgrade, or the reason motivated the package updates, but I started seeing the below two types of messages:
Please make sure that nx-libs 3.5.99.16 is installed on the server side.
For some of the machines, I saw the below message initially:
*The remote proxy closed the connection while negotiating* ** *the session. This may be due to the wrong authentication* ** *credentials passed to the server.*
This sounds like a typical incarnation of the DPMS bug, fixed with nx-libs 3.5.99.15.
for some other servers, I am getting the below message:
*Connection failed.**Failed to start X2Go Agent session with ID account-xxxxxx_stDXFCE_dp24. X2Go Agent terminated unexpectedly. Aborting session startup. *
The 1st message appeared first, after I tried to restart x2goserver or rebooting
the machine, or apply the updates, deleting the ~/.x2go folder, or a reboot, those
machines typically display the 2nd message; none of those were fixed using the
above procedures.
However, this doesn't sound like it. Normally the DPMS bug only manifests after a pretty long time (say, an hour or 1.5h, depending on DPMS settings), but not right away after starting the session. I haven't yet seen such an error message yet. It's possible that it's caused by the session repositioning on non-first displays/nxagent crashing bug as fixed with nx-libs 3.5.99.16, but normally that incarnates differently (i.e., nxagent is being started successfully, but then dies quickly while starting the session without a client-side error message).
Mihai