Hi,
please, use the specific forum of VPL
https://moodle.org/mod/forum/view.php?id=8672
I answer your questions/comments:
Q1) I am facing intermittent web socket connection issues on moderate usage.
A1) This is a symptom of some problem.
Q2) I can see "Ticket Invalid" message during the connection failure in server syslogs.
A2) This means that the task of the corresponding ticket has been cleared. This may happen if the time between the start of the task and the browser connection to the task takes too long (f.e. you have a very slow network and browsers).
Q3) browser developer tools logs are showing "websocket connection to jail server failed: Error during WebSocket handshake, unexpected response.
A3) This is the effect of the Q2 problem on the browser side.
In this case, to spot the problem, will be worth knowing the last part of the URL path.
Q4) is it a known issue?
A4) No this is the first report of this problem.
Q5) is it an issue related to version incompatibilities?
A5) No, you are using the last releases of the software.
Bets regards,
Juan Carlos.
